Chapter 6
Diagnostics
MAN_905G_1.16
Page 136
130 dBm). If the average noise is greater than –105, 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) Initialise and Enter Debug Menu
This option will put the 905G in
online
debug mode. In online mode, the module will
initialise the radio driver and go
online
to the radio network. Where possible, the fieldbus
driver will also be initialised (i.e. for Ethernet, Profibus, Modbus Plus, and DeviceNet) – for
Modbus, DF1, and ELPRO Serial Driver the fieldbus driver will be disabled so that the serial
port can be used for diagnostics. Note: before going online, the 905G 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
ELPRO 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
ELPRO Serial Driver), first enter the
offline
diagnostics menu (see 6.2.1 “Offline
Diagnostics” above). From the offline menu, select option “f) Initialise and Enter debug
Menu”. Once initialised the online menu will be displayed.
•
For Ethernet, Profibus, Modbus Plus, or DeviceNet protocol drivers, simply press "Enter"
to display the menu. If the module was previously in configuration mode or the offline
menu, then first reset power to the module.
A menu like the following will appear on the PC screen for the all models, however
Modbus/DF1 model will not have options h) through k).