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for the measured values to continually change - the radios are continually changing frequency.
Calculate the best average for both the noise and signal.
For reliable operation, the average signal strength should be better than –98dBm (that is, -
90dBm, not –100dBm) provided the average background noise is less than –108dBm (between –
108 and –130 dBm). If the average noise is greater than –108, the difference between the noise
level and the transmitter signal should be at least 10dB for reliable operation. For example, if the
average noise level is -101dBm, then a transmitter signal of better than -91dBm is required for
reliable operation.
Note the RSSI (received signal strength indication) of a received message is also stored in the
database registers when the module is online - refer to section 2.5.1
e) Tone Reversals
If you select this option, the module will continuously transmit - you can use this feature for
radio tests. Note that if you are powering the module from a battery only, the battery will be
discharged quickly.
f) Initialize and Enter Debug Menu
This option will put the WI-GTWY-9-xxx in
online
debug mode. In online mode, the module
will initialize the radio driver and go
online
to the radio network. Where possible, the fieldbus
driver will also be initialized (i.e. for Ethernet, Profibus, Modbus Plus, and DeviceNet) – for
Modbus, DF1, and Serial Driver the fieldbus driver will be disabled so that the serial port can be
used for diagnostics. Note: before going online, the WI-GTWY-9-xxx must complete any
“startup polls” that are configured – this may take some time depending on how many polls are
configured.
x) Exit
The module will restart via its normal power-up and initialization sequence, and resume its
normal operation mode. Select “Stop Terminal” to shut down the terminal and close the com
port.
6.2.2
Online Diagnostics
The online diagnostics menu enables the radio protocol driver
and
the fieldbus protocol driver
(where possible) to provide online diagnostic information while the module is running. When the
configured protocol driver uses the shared RS232/485 port (i.e. Modbus, DF1, or Serial Driver),
the online diagnostics must disable the serial protocol driver since the same serial port must be
made available for diagnostics.
To access the online diagnostics menu, first connect to the “terminal” in configuration software
(see above) or use any third party terminal package. Once the terminal is connected, display the
menu using the following procedure:
•
If the configured protocol driver uses the shared RS232/485 port (i.e. Modbus, DF1, or
Driver), first enter the
offline
diagnostics menu (see 6.2.1 “Offline Diagnostics” above). From
the offline menu, select option “f) Initialize and Enter debug Menu”. Once initialized the
online menu will be displayed.
