MVI56-MCM ♦ ControlLogix Platform Diagnostics and Troubleshooting
Modbus Communication Module
Page 82 of 159 ProSoft Technology, Inc.
July 24, 2008
Bit Description Value
9 Slave ID is not valid. 0x0200
10
Input bit or word, output word and/or holding register offset(s)
are not valid.
0x0400
11 Command count parameter is not valid. 0x0800
12 Spare 0x1000
13 Spare 0x2000
14 Spare 0x4000
15 Spare 0x8000
Correct any invalid data in the configuration for proper module operation. When
the configuration contains a valid parameter set, all the bits in the configuration
words will be clear. This does not indicate that the configuration is valid for the
user application. Make sure each parameter is set correctly for the specific
application.
Note: If the APP, BP ACT and OK LEDs blink at a rate of every one-second, this indicates a
serious problem with the module. Call ProSoft Technology Support to arrange for repairs.
7.2.1 Clearing a Fault Condition
Typically, if the OK LED on the front of the module turns red for more than ten
seconds, a hardware problem has been detected in the module, or the program
has exited.
To clear the condition, follow these steps:
1 Turn off power to the rack
2 Remove the card from the rack
3 Verify that all jumpers are set correctly
4 If the module requires a Compact Flash card, verify that the card is installed
correctly
5 Re-insert the card in the rack and turn the power back on
6 Verify the configuration data being transferred to the module from the
ControlLogix processor.
If the module's OK LED does not turn green, verify that the module is inserted
completely into the rack. If this does not cure the problem, contact ProSoft
Technology Support.
7.2.2 Troubleshooting
Use the following troubleshooting steps if you encounter problems when the
module is powered up. If these steps do not resolve your problem, please contact
ProSoft Technology Technical Support.
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