Prosoft-technology MVI56E-MNETCR Uživatelský manuál stáhnout pdf (Strana 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.

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Prosoft-technology MVI56E-MNETCR Uživatelský manuál Strana 102