ProSoft Technology MVI56E-MNETC - Manual (Page 114)

Guide to the MVI56E-MNETC User Manual MVI56E-MNETC ♦ ControlLogix Platform
User Manual Modbus TCP/IP Client Enhanced Communication Module
Page 114 of 183 ProSoft Technology, Inc.
February 3, 2013
Block ID Range Descriptions
9990 Set Module IP Address block
9991 Get Module IP Address block
9996 Unformatted Pass-through block with raw Modbus message
9997 Reset Module Status Data block
9998 Warm-boot block
9999 Cold-boot block
These block identification codes can be broken down into two groups:
Normal data transfer blocks
 Read and Write blocks (-1 to 50)
Special function blocks
 Initialize Output Data blocks (1000 to 1049)
 Event Command blocks (2000 to 2029)
 Client Status blocks (3000 to 3029)
 Server Status block (3100)
 Event Sequence Command blocks (4000 to 4029)
 Event Sequence Command Status blocks (4100 to 4129 and 4200)
 Command Control blocks (5001 to 5016)
 Pass-through Request blocks (9956 to 9961, 9970, and 9996)
 Module IP Address blocks (9990 and 9991)
 Reset Module Status block (9997)
 Warm-boot and Cold-boot blocks (9998 and 9999)
5.2.1 Normal Data Transfer Blocks
Normal data transfer includes the paging of user data from the module’s internal
database (registers 0 to 9999), as well as paging of status data. These data are
transferred through read (input image) and write (output image) blocks.
The following topics describe the function and structure of each block.
Read Block
These blocks of data transfer information from the module to the ControlLogix
processor.
The following table describes the structure of the input image.
Read Block from Module to Processor
Word Offset Description Length
0 Reserved 1
1 Write Block ID: -1 to 50 1
2 to 201 Read Data 200
202 Program Scan Counter 1
203 to 208 Block Transfer Status 6
209 to 238 Command bit data for Clients 30
239 to 240 Product Code 2