MVI56E-MNETC/MNETCXT ♦ ControlLogix Platform Reference
Modbus TCP/IP Client Enhanced Communication Module - Client/Server User Manual
ProSoft Technology, Inc. Page 125 of 172
September 20, 2018
Pass-Through Block 9959 from Module to Processor
Number of word registers in Modbus data set
Starting word address for Modbus data set
Bit mask for the data set. Each bit to be considered with the
data set will have a value of 1 in the mask. Bits to ignore in
the data set will have a value of 0 in the mask.
Pass-Through Block 9970 from Module to Processor (Function 99 request)
The ladder logic copies and parses the received message, and controls the
processor as expected by the Client device. The processor responds to the
formatted pass-through blocks with a write block.
Response Blocks 9956, 9957, 9958, 9959, 9960, 9961, or 9970 from Processor to Module
9956, 9957, 9958, 9959, 9960, 9961, or 9970