HyQuest Solutions iRIS 270, User Manual

Page 1: ...iRIS 270 User Manual...

Page 2: ...xternal Charger Power Supply 13 2 3 2 Analogue I O 14 2 3 3 Digital I O 16 2 3 4 Serial Sensor Interface SSI 19 2 4 Telemetry Module 20 2 4 1 Cellular 20 2 4 2 Serial 22 2 4 3 WIP Ethernet 24 2 5 Tele...

Page 3: ...82 3 8 Upgrading Firmware 85 3 8 1 iRIS Executive Firmware File Naming Conventions 85 3 8 2 Active verse Pending Firmware 86 3 8 3 iRIS Automated Upgrade Procedure Firmware 86 3 8 4 iRIS Manual Upgra...

Page 4: ...al 120 4 7 5 Check Count 120 4 8 Real time Diagnostics 121 4 9 Analogue Input Scaling 123 4 9 1 Example A 4 20mA Water Level Sensor 123 Part V Repair 125 Part VI Technical Data 126 Part VII Obligation...

Page 5: ...rmation provided in this manual was deemed accurate as of the publication date However updates to this information may have occurred This manual does not include all of the details of design productio...

Page 6: ...und before starting to work as well as for defects found while working Do not use the HyQuest Solutions iRIS 270 in areas where there is a danger of explosion The present user manual specifies environ...

Page 7: ...ble devices General Characteristics The iRIS 270 is supplied in an environmentally sealed IP67 enclosure constructed from a special corrosion resistant aluminium alloy that is finished in a hard anodi...

Page 8: ...throughout this manual in all references to the iRIS 270 1 2 Key Features This chapter contains the following subsections Telemetry and SDI 12 Diagnostics Power Management Data Logging Logged Data Ar...

Page 9: ...ed Data Array Identification Each sensor s logged data is identified by an array ID number For the primary logged data the ID is the sensor number itself For the optional supplementary data min max de...

Page 10: ...arm on any sensor in the device is active This is used to trigger a call in or data transfer to the designated host As well as the call in this flag can also control the digital outputs 1 2 6 Real Tim...

Page 11: ...rtant that the four screws retaining the lid are tightened firmly after installation to maintain the IP67 rating of the enclosure 2 2 Opening Closing the Housing The front of the iRIS enclosure is sec...

Page 12: ...mm 0 2 pitch screw terminals provided on a 12 way and 10 way pluggable connector The I O connectors are positioned externally on each side of the iRIS enclosure to allow easy unplugging of the iRIS Th...

Page 13: ...um Power Point Tracking MPPT for maximum efficiency The external power supply is protected against over voltage by ultra fast acting protection devices and a self resetting semiconductor fuse See sect...

Page 14: ...ation Figure 4 Shows examples of the correct and incorrect methods of connecting the iRIS to power source and an external battery 2 3 2 Analogue I O This chapter contains the following subsections Ana...

Page 15: ...ink resistor 100 is enabled by an internal user settable link In this mode the measured voltage range is 0 2V for a 0 20mA input and the scaling factor should take this into account As the analogue in...

Page 16: ...four digital I O channels which can each be configured as either an input or output When set as an output the channel can either supply switched 12V or else act as a pull down switch for loads with a...

Page 17: ...input This sets the input to electronic switching mode even if the actual pulse source is a clean contact reed switch or similar The debounce jumpers are located in the centre of the PCB and can be a...

Page 18: ...a radio based gateway Typically an output is configured to follow a schedule for use in powering loads There is a similar mode termed Schedule Plus In Schedule Plus mode the relevant output s will be...

Page 19: ...485 STX RS232 transmit RS485 T SRX RS232 receive RS485 T GND Signal GND N A Table 1 SSI terminal definition Selecting Serial Mode 2 3 4 1 Selecting Serial Mode The choice of RS 232 or RS 485 modes mu...

Page 20: ...igure 13 detail depiction of RS 232 RS 485 jumper positions 2 4 Telemetry Module The iRIS the can be fitted with any combination of the modules in this section Cellular Serial WIP Ethernet 2 4 1 Cellu...

Page 21: ...SIM card as the carrier is fragile Open the front cover as described above Using a finger nail or small screwdriver inserted into one of the two oval holes on the sliding holder gently lower the slid...

Page 22: ...of the DB9 connector is connected to the ground of the iRIS Serial DB I O Connector 2 4 2 1 Serial DB I O Connector In situations where the supplied pigtail is unwanted for example direct serial conne...

Page 23: ...Data RXD RXD Output Transmit Data TXD DTR Output Data Terminal Ready DTR 0V 0V Signal Ground DSR Input Data Set Ready DSR RTS Output Ready to Send RTS CTS Input Clear to Send CTS RI Input Ring Indicat...

Page 24: ...n the base of the enclosure for cable passage will not allow the RJ45 connector to pass so the cable must be feed thought the gland and then terminated to the connector It is recommended that 8 core t...

Page 25: ...3 White Green 3 4 Blue 4 5 White Blue 5 6 Green 6 7 White Brown 7 8 Brown 8 Table 5 Ethernet RJ45 T568B standard wiring example 2 4 3 2 Crossover Wiring The crossover wiring between a pair of RJ45 con...

Page 26: ...ional type antenna will suffice In areas of more marginal coverage the antenna should an external high gain type such as a Yagi via appropriate low loss high frequency coaxial cable and male SMA conne...

Page 27: ...G MA GPS Satellite None TBD Unused TBA Satellite Serial TBD MB Serial TBA Cellular Satellite TBA Unused TBA Cellular Ethernet 3G MA GPS Ethernet MB 3G MA Cellular 4G MA Cellular 4G MA DIV 4G MA Cellul...

Page 28: ...ase where the iRIS is fitted with two communications modules that require more than one gland it will have two glands mounted on the bottom of the base of the enclosure Figure 17 Communications port c...

Page 29: ...modem fitted to the iRIS can be determined by reading the label on the modem Open the iRIS and locate the communications module Module A is in the top half Module B is located in the bottom half of t...

Page 30: ...ssword with iLink Desktop software via Wi Fi Windows 10 Configuration Menus SDI 12 Command Mode Using iLink s Sensor Configuration Tool Modbus Protocol Upgrading Firmware 3 1 Connecting to the iRIS 27...

Page 31: ...ablish a connection with the iRIS 3 2 Turn off Wi Fi Access Point The Wi Fi access point will turn itself off after a predetermined time see section Wi Fi or it can be turned off on demand via SMS com...

Page 32: ...d Otherwise it will not be possible to connect to the iRIS again through the Wi Fi interface once the default password is changed From the overview screen click the shortcut button General on the righ...

Page 33: ...ting to the iRIS 270 with iLink Desktop software via Wi Fi to reconnect to the iRIS this time using the new password 3 4 Configuration Menus All the configuration can be done by connecting the device...

Page 34: ...s field Date Separator This option is used to select the date format as displayed throughout the iRIS LCD screens configuration menus and FTP file exports Date Format This setting is used to select th...

Page 35: ...nch see ch System Charger Source Enter the power source for the charger DC power supply or SOLAR This selects the battery charging profile the iRIS will use Only select SOLAR if the iRIS charger is be...

Page 36: ...is defined by the Span setting as a percentage of full scale 5V or 20mA Mode When the output is controlled by a sensor this sets the actual value to use This is either the current value which will be...

Page 37: ...face OR the power mode is set to RS232 Telemetry and an alarm requiring transmission to a base station is pending the output will be on Alarm The output is on if any sensor alarm is active Turns off w...

Page 38: ...and be electrically on when the output is logically off If the polarity setting is Pull Down the output will short the output terminal to GND A maximum of 100mA can be sunk in this mode from an extern...

Page 39: ...4 1 Wi Fi Wi Fi Password Allows you to change the password for accessing the Wi Fi access point on the iRIS A change in password will not take effect until the Wi Fi session has be reinitialized Wi Fi...

Page 40: ...ations interface Base Address Address of the base station to use when calling back using the RS232 telemetry mode The base address is normally set to zero If the unit will be expected to call back to...

Page 41: ...ne Even and Odd The default is None Stop Bits This option configures the number of stop bits in each serial frame possible options are 1 and 2 The default is 1 Protocol This is the protocol to be used...

Page 42: ...ot require any login credentials in which case this and the password parameter below should be empty Password Enter the password required by your network provider Note Many providers do not require an...

Page 43: ...SMS messages This is a power saving feature Please see section SMS Numbers for more information Allow Changes to Unsafe Values The APN Username and Password are marked as unsafe values which may caus...

Page 44: ...eing established or an SMS message being sent when the time is in the off period i e before the start time or after the end time This setting will normally be 0 no activity but this option allows a di...

Page 45: ...nclude Header If checked a header is place on the first row or line of the file generated on the server see section 0 Sample Time Stamps in UTC If checked the sample in the file generated on the serve...

Page 46: ...ct to as its primary base host server Primary Base Port Enter a non zero port number to use for the IP socket Secondary Base IP Enter the optional secondary base remote IP address that you will connec...

Page 47: ...e possible options are None and Hardware The Hardware option uses RTS and CTS has hardware flow control lines The default is None Protocol This is the protocol used by the iRIS via the given serial da...

Page 48: ...en a gateway to the internet The iRIS uses this address to forward packets to IP addresses that are not within the network it is within The address is an IPV4 format Internet Protocol version 4 static...

Page 49: ...for this setting The HyQuest protocol is used in conjunction with HyQuest or Kisters software packages The Modbus protocol is the open industrial protocol see section Modbus Protocol for more informa...

Page 50: ...ished when the time is in the off period i e before the start time or after the end time This setting will normally be 0 no activity but this option allows a different connection rate to be configured...

Page 51: ...he Automatic Device addition method see section 0 To be able to configure successfully the device s SDI 12 address the appropriate measurement command and number of variables the device returns for th...

Page 52: ...ffect First Command at This is the time that the first custom command will be issued relative to iRIS local time Allowing the custom command issuing interval to be offset If this setting and Command I...

Page 53: ...user The devices found on the bus will be displayed in the list at the bottom of the scan window Select the devices to be added to the iRIS configuration by checking the SELECT box and clicking the FI...

Page 54: ...options are DBA DaughterBoard A DBB DaughterBoard B and SSI Authority Role This is the Modbus Authority when set to Master the iRIS will interrogate the devices When set to Slave the iRIS responds to...

Page 55: ...sters in the device A datatype can be chosen with the dropdown box and then click Add button to add to the list To change an item s in the list simply check the incorrect item s select a new data type...

Page 56: ...the format configuration allows for then the text on the LCD will be inverted and truncated For example when the format is configured as 0 000 and the value to be displayed is 12 2 the value displaye...

Page 57: ...ounter on Digital Input 2 0 to 1 Auto Pulse Counter on Digital Input 3 0 to 1 Frequency Counter on Digital In 1 0 to 400Hz Frequency Counter on Digital In 2 0 to 400Hz Frequency Counter on Digital In...

Page 58: ...uation Calibration User Offset This is the offset to shift the scaled value s datum SDI 12 Device Select which SDI 12 device the virtual sensor will use as a source Note Only available when SDI 12 is...

Page 59: ...st log time date This is required for time series management purposes Period Average Logs the average of all samples taken over logging period Partial Period Average Logs are averaged of the duration...

Page 60: ...hen the sample is actually logged First Routine Log hour This is the hour in the day when the first routine log will occur Routine Log Rate The routine log rate is the interval at which a routine log...

Page 61: ...r the alarm When the scaled value crosses this threshold when the alarm is active it will be reset Duration This is the time in seconds to delay alarm activation This can be used to implement alarm hy...

Page 62: ...le of sending user commands across the SDI 12 bus and displaying the results It also has a handy address change function and SDI 12 address scan function For more information see the following subsect...

Page 63: ...r more information on SDI 12 3 5 3 Address Change function Although it is possible to change the address of the SDI 12 sensor using the user command function in the previous section iLink can automati...

Page 64: ...m an SDI 12 sensor and also log internal battery voltage This example is valid for all iRIS 1 Connect to the iRIS using iLink 2 Invoke the iRIS sensor configuration form by selecting Sensors node from...

Page 65: ...logging to an event mode for non pulse sensor types This is enabled by setting a non zero delta value In this mode the sensor measurements and processing e g averaging are still done exactly as before...

Page 66: ...er Level sensor as a source 21 In the trigger box enter 3 5 and in the reset box enter 3 6 22 Click the Call check box to get the iRIS to make a call in when the event occurs 23 The Alarms Configurati...

Page 67: ...onfiguring the Water Level sensor earlier but in this case select Battery Voltage External and name it Battery Voltage The configuration should look like this 27 Set up the logging parameters with a s...

Page 68: ...Master Example of iRIS acting as a Slave Sensor Example of iRIS acting as a protocol gateway Modbus Slave 3 7 1 Protocol Overview Modbus is a serial communications protocol originally published by Mo...

Page 69: ...llection the iRIS acts as a master and the sensor s act as slaves Data Source The iRIS acts as slave and another system which acts as a master The iRIS provides scaled measurements obtained from its p...

Page 70: ...ion with a single slave One of the key concepts of Modbus is the function code Most requests from the Master contains the address of the slave it wishes to converse with the function code and the numb...

Page 71: ...esents whole numbers between 32 768 and 32 768 ON_OFF 1 Single bit either zero or one U_INT32 2 The unsigned integer type represents whole numbers between 0 and 4 294 967 295 S_INT32 2 The signed inte...

Page 72: ...ata Type 40001 40002 Sensor 1 Current Value Float 40003 40004 Sensor 1 Last logged Float 40005 40006 Sensor 2 Current Value Float 40007 40008 Sensor 2 Last logged Float 40009 40010 Sensor 3 Current Va...

Page 73: ...40046 Sensor 12 Current Value Float 40047 40048 Sensor 12 Last logged Float 40049 40050 Sensor 13 Current Value Float 40051 40052 Sensor 13 Last logged Float 40053 40054 Sensor 14 Current Value Float...

Page 74: ...95 40096 Sensor 24 Last logged Float 40097 40098 Sensor 25 Current Value Float 40099 40100 Sensor 25 Last logged Float 40101 40102 Sensor 26 Current Value Float 40103 40104 Sensor 26 Last logged Float...

Page 75: ...5 40146 Sensor 37 Current Value Float 40147 40148 Sensor 37 Last logged Float 40149 40150 Sensor 38 Current Value Float 40151 40152 Sensor 38 Last logged Float 40153 40154 Sensor 39 Current Value Floa...

Page 76: ...sensors 3 7 2 Example of iRIS acting as a Master This section describes how to use iLink to configure the iRIS to obtain information from a fictitious sensor that measure wind speed wind direction an...

Page 77: ...This will add U_INT16 datatype to the Registers List In this example this represents the wind direction 7 In the REGISTERS section select the FLOAT data type and click the ADD button This will add Flo...

Page 78: ...e ADD SENSOR branch and in the newly created sensor enter the following Name Wind Direction Source Modbus Device Modbus Device Name given in step 3 Variable 2 Units Degrees 13 Click the ADD SENSOR bra...

Page 79: ...btained from it analogue and digital inputs to a Modbus Master for example a Programmable logic controller PLC The example also assumes that the PLC has been wired to the Serial Sensor Interface which...

Page 80: ...the dynamically created indices 8 Navigate to the SENSORS section of the configuration tree and click the ADD SENSOR branch 9 In the newly created sensor enter the following Name Wind Speed Source Fre...

Page 81: ...sensor enter the following Name Temperature Source Temperature Multiplier 1 Units Deg C 12 Configure logging as required 13 Click the SEND CONFIG button to commit the settings to the iRIS 14 Configur...

Page 82: ...gateway between a Modbus host for example a Programmable Logic Controller PLC and HydroTel The iRIS will operate as Modbus Slave and the PLC will read and write values into holding registers that can...

Page 83: ...there are six S_INT16 data types in the Register List 7 Click the SEND CONFIG button to commit this to the iRIS 8 Click the RETRIEVE CONFIG button to obtain the dynamically created indices 9 In Hydro...

Page 84: ...ltiple Holding Registers Slave Address 0 Register address 40201 or 200 depends on PLC operation Number of registers to write 3 Register data type Signed 16 bit Integer 16 Configure the PLC to poll the...

Page 85: ...erasing and reprogramming of flash memory it is important that a good securely connected power supply is provided to the iRIS throughout the upgrade process This chapter contains the following subsec...

Page 86: ...indicates that version 1 4 3 of the firmware is part way through being uploaded to the iRIS 3 8 3 iRIS Automated Upgrade Procedure Firmware iLink has an automated firmware upgrade tool that supports t...

Page 87: ...isted above in section iRIS Executive Firmware File Naming Conventions 2 Connect to the iRIS using iLink 3 Click the PROGRAM button under the CONFIGURATION tab 4 Click on MANUAL UPGRADE 5 Select the n...

Page 88: ...d UTC offset is used to adjust the date times on the LCD as viewed by users to the local standard time zone If configured also the timestamps in the FTP files can be written in local standard time zon...

Page 89: ...isplay Screens Sensor Selection Sub menu Level 3 Sensor Related Screens Totaliser Related Screens Comms Related Screens 4 3 1 LCD Operation The iRIS LCD is controlled to optimise power consumption If...

Page 90: ...N is set to zero Indicates signal strength Only updated when wireless modem is powered up but wireless IP session is not active Indicates current battery charge The level indication bars cycle when ch...

Page 91: ...4 Status 5 Status 6 Status 7 Main Menu Sensors Menu Sensors 1 16 Sensors 17 32 Sensors 33 50 Sensor Menu Sensor data Totaliser 1 3 Comms Module 1 Comms Module 2 3 Full Access PIN code 0 and user is lo...

Page 92: ...evel 6 Log Control Main Menu Sensors Menu Sensors 1 16 Sensors 17 32 Sensors 33 50 Sensor Menu Sensor Settings 1 4 Sensor calibration Sensor data Totaliser 1 3 Totalisers Reset Comms Module 1 Comms Me...

Page 93: ...of the current digit Press and held no action Right In Menus acts on the selected menu item In Screen Groups access sub menus if available In Numerical entry shifts edit cursor to the digit to the rig...

Page 94: ...e display 4 3 5 2 System Status 1 Screen Level 1 The System Status 1 screen is the default screen shown at system power up hence its designation as display level 1 Useful information shown on this scr...

Page 95: ...Enter Not used 4 3 5 6 System Status 5 Screen Level 1 The System Status 5 screen is always available no matter what level of access has been selected The information shown on this screen includes the...

Page 96: ...ng when the logged in user is making changes to or testing sensors and does not want to have the data logged It is reached by pressing the down key from Status Screen 7 Use the Enter key to enter edit...

Page 97: ...n Screen Level 6 Sensor Calibration Acceptance Screen Level 6 Sensor Data Screen Level 6 4 3 7 1 Sensor Status Screen Level 4 This screen provides an overview of each sensor Line 1 indicates sensor ID...

Page 98: ...Sensor Settings Screen 2 4 Scaling Level 6 The Sensor Scaling screen shows the multiplier and offset used to convert the incoming raw data to engineering units It also shows the user calibration value...

Page 99: ...et shows the user offset When entering the screen it will show the current user offset After entering a calibration value it will show the updated user offset Final allows the user to set the target v...

Page 100: ...ns Right Access reset menu for given input if logged in Left Move to Main Menu Enter Not used 4 3 8 2 Reset Total Screen Level 4 The Total Reset screen is used to reset the two daily and the running t...

Page 101: ...e RSSI display shows the Received Signal Strength Indication RSSI in dBm Up Access Comms Module 1 Status Screen Down Access Comms Module 1 Status Screen Right Access Comms Menu if user is logged in Le...

Page 102: ...e down through the Settings Screens Right Not used Left Move to Comms Menu Screen Enter Not used 4 3 9 7 Comms Setting Screen 4 8 Secondary Base Level 5 This screen displays the remote IP address and...

Page 103: ...g Screen 8 8 SMS Settings Level 5 This screen displays the primary and secondary phone numbers for the iRIS to use when it initiates the sending of a SMS text message SMS call back mode Up Move up thr...

Page 104: ...tery charger with predefined stages and thresholds for SLA batteries For more information see the following subsections Charging Batteries cycles Charging Process Charger LED Flash States 4 4 1 Chargi...

Page 105: ...e limit LV Control Disconnect if Battery V 10 0V Reconnect if Battery V 11 0V 4 4 2 Charging Process This chapter contains the following subsections Charging Source Charge Algorithm Stages 4 4 2 1 Cha...

Page 106: ...itself so that the maximum power is retrieved from the solar In MPPT mode the minimum Vin voltage that is controlled down to is 10 5V CV Charge at a constant voltage trying to keep Vout voltage consta...

Page 107: ...ommands 4 5 1 SMS Text Commands The iRIS can accept incoming SMS messages and if they are valid it will respond appropriately Any text message received that is invalid will be ignored To use the SMS r...

Page 108: ...arameter For example Or when to make a one off connection uses the already configured APN RQ ReQuest current sensor values This command can be used to retrieve the iRIS details and current sensor read...

Page 109: ...ection Cellular Modem Schedule from information on configuring this setting via iLink allowing the user to increase or decrease the update rate of data sent out via the cellular telemetry module The m...

Page 110: ...data sent out via the cellular telemetry module while an alarm is active The message is in the format AINT t Where t is the interval in units of minutes Example Will change the schedule interval to 60...

Page 111: ...digital output must be configured to Remote mode see section Digital I O Digital Output Modes Also the iRIS will only act on the command if the received command is from one of the phone number in the...

Page 112: ...ged to and is text ON or OFF For example in response to OUT1 1 from an authorised number and no custom messages Or in response to OUT1 1 from an unauthorised number and no custom messages Or in respon...

Page 113: ...of check boxes see 0 The possible elements are as follows Base File Name this is a constant alphanumeric of up to 16 characters Avoid using reserved characters such as Serial Number the serial number...

Page 114: ...9 2018 21 10 00 1 310000 CR LF 1 23 09 2018 21 15 00 1 300000 CR LF 2 23 09 2018 21 10 00 25 125000 CR LF 2 23 09 2018 21 10 00 25 250000 CR LF 2 23 09 2018 21 15 00 25 125000 CR LF 3 23 09 2018 21 10...

Page 115: ...le contain data for two sensors no samples for Rainfall as it is event based logging mode and 3 samples for the water level ZRXPVERSION3014 ZRXPCREATORiRIS270 CDASANAMEInnovation Park CDASAAG6 0006 TZ...

Page 116: ...0 20220405125000 040 709 0 20220405124000 039 817 0 Time Series A header block is generated for each sensor configured in the iRIS disabled sensors are omitted from the file Header block will be gene...

Page 117: ...300 CUNIT Unit of measurement of the sensor see section General for information on configuring the units Example CUNITmm is millimetres CNAME Sensor name see section General for information on configu...

Page 118: ...The time series fields are separated by the space character 0x20 4 7 Logging Auxiliary sensor information In addition of the main parameter being measured and recorded auxiliary information can be rec...

Page 119: ...r each logging period for the given sensor For example if water level is being logged every 15 minutes then Maximum will be recorded once between each of the following inter 00 00 01 to 00 15 00 00 15...

Page 120: ...the period in units of litres per second l s For example a flow total of 1 32m3 over 15 minutes will result in 1 32 x 1000 60 x 15 1 466 l s When the iRIS is configured with a source of Analog in then...

Page 121: ...t Wi Fi cellular or Serial Daughterboard This feature can be found in the Advance ribbon of iLink and then clicking on the Diagnostics button Initially the diagnostic screen will not show any informat...

Page 122: ...wing is an example of the power on sequence of the daughter board A and without a SIM card fitted The grid can be cleared by right clicking and selecting Clear Grid Diagnostics information can be save...

Page 123: ...0mA An external resistor of a different value can be used if desired E g 250 will give 5V at 20mA Please see section Analogue Inputs for more information for connecting the internal resistor to the in...

Page 124: ...2022 HyQuest Solutions 124 Operation Figure 27 Shows an example of using the scaling calculator for a 4 20mA sensor...

Page 125: ...our return shipment 2 Please provide as much information and or clear instructions within the return paperwork This will assist our test engineers with their diagnosis 3 Please do not ship the goods p...

Page 126: ...omplies with SDI 12 Version 1 3 Wi Fi Power Supply External 12 V SLA integral charger 10 30 V DC input optional solar panel Lowest power mode current 7 mA Overvoltage and reverse polarity protected wi...

Page 127: ...tions must be observed 7 2 Dismantling Disposal When disposing of the units and their accessories the applicable local regulations regarding environment disposal and occupational safety must be observ...

Page 128: ...re committed to supporting efforts to avoid and recycle waste Please consider Avoidance before recycling Recycling before disposal This symbol indicates that the scrapping of the unit must be carried...

Page 129: ...to a single data recorder Multi parameter means that a single sensor may return more than one measurement For example some water quality sensors return temperature conductivity dissolved oxygen pH tur...

Page 130: ...lso must be connected to the ground line but not normally to its own earth ground If it is necessary to connect the sensor circuitry to earth ground a heavy 12 AWG or larger ground wire should be conn...

Page 131: ...port The confusion begins however when we find that depending on the mode the data port is not always on port 20 Active FTP In active mode FTP the client iRIS connects from a random unprivileged port...

Page 132: ...subject a quick note about the format of the PORT command As you can see in the example below it is formatted as a series of six numbers separated by commas The first four octets are the IP address wh...

Page 133: ...e of problems on the server side The biggest issue is the need to allow any remote connection to high numbered ports on the server Fortunately many FTP daemons including the popular WU FTPD allow the...

Page 134: ...RT command above in the Active FTP Example section testbox1 home p t slacker public_html ftp d testbox2 Connected to testbox2 slacksite com 220 testbox2 slacksite com FTP server ready Name testbox2 sl...

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