ProSoft Technology MVI56E-MCM/MCMXT - Manual (Page 69)

MVI56E-MCM ♦ ControlLogix Platform Verify Communication
Modbus Communication Module User Manual
ProSoft Technology, Inc. Page 69 of 199
June 18, 2014
Offset Content Description
232 Port 1 Last Error For a Master Port, this field contains the command index
number of the previous most recently executed command
that failed. To find what kind of error occurred, see the
Command Error List entry for this command index number.
233 Port 2 Current Error For a Master Port, this field contains the command index
number of the most recently executed command that failed.
To find what kind of error occurred, see the Command Error
List entry for this command index number.
234 Port 2 Last Error For a Master Port, this field contains the command index
number of the previous most recently executed command
that failed. To find what kind of error occurred, see the
Command Error List entry for this command index number.
4.1.2 Command Error Codes
The MVI56E-MCM module will return an individual error code for every command
configured within the MCM.CONFIG.P
ORT XM ASTER C MD section. The location of
these error codes are determined by the parameter
MCM.CONFIG.P
ORT X.C MD E RR P TR . This parameter determines where in the
module's 10,000-register database the error codes for each command will be
placed. The amount of error codes returned into the database is determined by
the MCM.CONFIG.P
ORT X.C MD C OUNT parameter, therefore if the maximum
number of commands have been selected (325), then 325 registers will be
placed into the module memory.
Note: To use up to 325 commands, your MVI56E-MCM module needs to have firmware version
3.01 or higher, and your MVI56E-MCM Add-On Instruction needs to be version 2.8 or higher.
Earlier versions support up to 100 commands.
To be useful in the application, these error codes must be placed within the
MCM.DATA.R
EAD D ATA array.
Once again, the configuration in the MCM.CONFIG.M OD D EF section for
R EAD S TART R EG , and R EAD R EG C OUNT determine which of the 10,000 registers
will be presented to the ControlLogix processor and placed in the tag
MCM.DATA.R
EAD D ATA array.
Based on the sample configuration values for R EAD S TART R EG and
R EAD R EG C NT , this will be addresses 1000 to 1599 of the module memory. Below
are the sample configuration values.