ProSoft Technology MVI56E-MNET/MNETXT - Manual (Page 116)

Reference MVI56E-MNET / MNETXT ♦ ControlLogix Platform
User Manual Modbus TCP/IP Interface Module
Page 116 of 181 ProSoft Technology, Inc.
April 23, 2014
Write Block
These blocks of data transfer information from the ControlLogix processor to the
module.
The following table describes the structure of the output image.
Write Block from Processor to Module
Word Offset Description Length
0 Write Block ID 1
1 to 200 Write Data 200
201 to 247 Spare 46
247 Select Priority Read Block 1
The Write Block ID is an index value used to determine the location in the
module’s database where the data will be placed. Each transfer can move up to
200 words (block offsets 1 to 200) of data.