ProSoft Technology MVI56E-MNETCR - Manual (Page 102)

Reference MVI56E-MNETCR ♦ ControlLogix Platform
User Manual Modbus TCP/IP Multi Client Enhanced Communications Module for Remote Chassis
Page 102 of 159 ProSoft Technology, Inc.
June 14, 2011
Initialize Output Data
When the module performs a restart operation, it will request blocks of output
data from the processor to initialize the module’s output data (Read Data Area).
Use the Initialize Output Data parameter in the configuration file to bring the
module to a known state after a restart operation. The following table describes
the structure of the request block.
Offset Description Length
0 1000 to 1124 1
1 to 40 Spare 40
41 1000 to 1124 1
The block number in word 20 of the block determines the data set of up to 40
output words to transfer from the processor. Ladder logic in the processor must
recognize these blocks and place the correct information in the output image to
be returned to the module. The following table describes the structure of the
response block.
Offset Description Length
0 1000 to 1124 1
1 to 40 Output Data to preset in module. 40
41 Spare 1
5.2.3 Special Function Blocks
Special function blocks are special optional blocks used to request special tasks
from the module. The MVI56E-MNETCR supports the following special function
blocks:
Initialize Output Data
Event Command
Client Status request
Client Status response
Command Control
Set new module IP address
Get module IP address
Warm-boot
Cold-boot
Important: Each command defined in the command list is controlled by the ladder logic. The Write
Command Bits parameter must be set in ladder logic to allow the command to be sent out on the
Modbus TCP/IP network.