Table 1. Setting the operating mode: RS422 or RS485
SW1-1 SW1-2 SW1-3 SW1-4 SW1-5 SW1-6
Description
Operating mode
ON
ON
ON
ON
ON
ON
RS-485 network, automatic data flow
control
2-wire and 4-wire RS485 network.
Full duplex or half duplex transmission.
OFF
OFF
OFF
OFF
OFF
OFF
RS-422 network
4-wire RS422 network.
Full duplex or half duplex transmission.
4.2. SETTING OF TYPE AND NUMBERS OF PORTS RS485 IN
Converter ADA-1044H has on front panel the switch
RS-485 PORTS
(see fig.1), which is use for selection of type and numbers of
RS485 ports. Available ports type: 4W – four-wire, 2W – two-wire.
Setting the switch in position '4W' there are available 2 ports 4-wire (full duplex transmission) labeled as:
- port-1, signals: T1+, T1-, R1+, R1-,
- port-2, signals: T2+, T2-, R2+, R2-.
Setting the switch in position '2W' there are available 4 ports 2-wire (half duplex transmission) labeled as:
- port-1, signals: A1, B1,
- port-2, signals: A2, B2,
- port-3, signals: A3, B3,
- port-4, signals: A4, B4.
Table 2. Settings of RS-485 PORTS switch
Switch position
Port type
Numbers of
ports
Maximum numbers of
connected device
2W
2-wire RS485 port
4
128
4W
4-wire RS485(4W) / RS422 port
2
64 - RS485 / 2 - RS422
4.3. FACTORY DEFAULT
Factory default of ADA-1044H is shown in table below - operating in rs485 mode and 4 ports of rs485.
Table 3. SW1 setting of operating mode RS422 or RS485.
SW1-1 SW1-2 SW1-3 SW1-4 SW1-5
SW1-6
ON
ON
ON
ON
ON
ON
Table 4. Setting of RS-485 PORTS switch.
Switch position
Port type
Numbers of
ports
Maximum numbers of
connected device
2W
2-wire RS485 port
4
128
5. ACTIVATION
Converter can be power on after proper connection according to steps above.
If connection was made properly green LED PWR on front panel of converter should light, if not check polarization of power
connection. When data is present the LEDs Tx and Rx should blink
5.1. LEDS DESCRIPTION
LED
Opis
PWR
Signalling of Power Supply
RX
Signalling of data receiving through ADA-1044H converter from RS485/422 port.
TX
Signalling of data transmitting from ADA-1040 converter through RS485/22 port.
ATTENTION!
At baud rate above 38.4 kbps the LED's Tx, Rx will light weakly during data transmission
5.2. TROUBLESHOOTING
Problem
Solutions
PWR LED is not lights Check polarization and parameters of connected power supply.
Rx LED lights
continuously
RS485(4W) /RS422 Bus. Wrong polarization on R1+ /R1-, R2+ /R2- terminals. Change polarization.
RS485(2W) Bus. Wrong polarization on A1/B1, A2/B2, A3/B3, A4/B4 terminals. Change
polarization.
No transmission,
Tx LED is blinking
RS485(4W) / RS422 Bus. Check the correctness of connection according to paragraph
INSTALLATION
.
RS485(2W) Bus. Check the correctness of setting according to paragraph
CONFIGURATION
.
10
ADA-1044H
