ProSoft Technology MVI56E-MCMR - Manual (Page 138)

Diagnostics and Troubleshooting MVI56E-MCMR ♦ ControlLogix Platform
User Manual Modbus Communication Module with Reduced Data Block
Page 138 of 225 ProSoft Technology, Inc.
May 13, 2014
5.4 Communication Error Codes
During module configuration download, the OK and APP LEDs will cycle through
various states. If the OK LED remains RED and the APP LED remains OFF or
RED for a long period of time, look at the configuration error words in the
configuration request block. The structure of the block is shown in the following
table.
Offset Description Length
0 Reserved 1
1 9000 1
2 Module Configuration Errors 1
3 Port 1 Configuration Errors 1
4 Port 2 Configuration Errors 1
5 to
38
Spare
34
39
-2 or -3 1
The bits in each configuration word are shown in the following table. The module
configuration error word has the following definition:
Bit Description Value
0 Read block start value is greater than the database size. 0x0001
1 Read block start value is less than zero. 0x0002
2 Read block count value is less than zero. 0x0004
3 Read block count + start is greater than the database size. 0x0008
4 Write block start value is greater than the database size. 0x0010
5 Write block start value is less than zero. 0x0020
6 Write block count value is less than zero. 0x0040
7 Write block count + start is greater than the database size. 0x0080
8 0x0100
9 0x0200
10 0x0400
11 0x0800
12 0x1000
13 0x2000
14 0x4000
15 0x8000