ProSoft MVI56E-MCMR User Manual page 79

MVI56E-MCMR ♦ ControlLogix Platform
Modbus Communication Module with Reduced Data Block
The W R
RITE EGISTER
W D [0
RITE ATA
the 5000 registers to use for information to be written out to the module. The
sample ladder file will configure 600 registers for Write Data, labeled
MCM.W D
RITE
Value
Error/Status Block Pointer
Read Register Start
Read Register Count
Write Register Start
Write Register Count
Backplane Fail Count
With the sample configuration, the following is the layout of the tags and
addressing.
The sample configuration values configure the module database for
W D [0
RITE ATA
and R D
EAD ATA
1599 as shown above.
ProSoft Technology, Inc.
S determines the starting register location for
TART
599] and the W
TO RITE
[0 599].
ATA TO
Description
This parameter places the STATUS data into the database of the
module. This information can be read be the Modbus Master to know
the status of the module.
Determines where in the 5000 register module memory to begin
obtaining data to present to the ControlLogix processor in the
ReadData tags.
Sets how many registers of data the MVI56E-MCMR module will send
to the ControlLogix processor. This value should also be a multiple of
40.
Determines where in the 5000 register module memory to place the
data obtained from the ControlLogix processor from the WriteData
tags.
Sets how many registers of data the MVI56E-MCMR module will
request from the ControlLogix processor. Because the module pages
data in blocks of 40 words, this number must be evenly divisible by 40.
Sets the consecutive number of backplane failures that will cause the
module to stop communications on the Modbus network.
599] to be stored in the module memory at register 0 to 599,
TO
[0 599] to be stored in the module memory at registers 1000 to
TO
Configuring the MVI56E-MCMR Module
R C determines how many of
EGISTER OUNT
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