ProSoft Technology ControlLogix inRAx MVI56E-MNETR User Manual page 122

Reference
User Manual
Warm Boot Block (9998)
This block is sent from the ControlLogix processor to the module (output image)
when the module is required to perform a warm-boot (software reset) operation.
The following table describes the format of the control block.
Offset
0
1 to 41
Cold Boot Block (9999)
This block is sent from the ControlLogix processor to the module (output image)
when the module is required to perform the cold boot (hardware reset) operation.
This block is sent to the module when a hardware problem is detected by the
ladder logic that requires a hardware reset. The following table describes the
format of the control block.
Offset
0
1 to 41
Pass-Through Control Blocks
If the module is set for pass-through operation by placing a value of 1 to 3 in the
configuration file parameter Pass-Through Mode, the module will send special
blocks to the module when a write request is received from a client. Any Modbus
function 5, 6, 15 or 16 commands will be passed from the server to the processor
using this block identification numbers 9956 to 9961, 9970 and 9996. Ladder
logic must handle the receipt of these blocks and to place the enclosed data into
the proper controller tags in the module.
There are two basic modes of operation when the pass-through feature is
utilized: Unformatted (code 1) and Formatted (code 2 or 3). The unformatted
mode will pass the message received on the server directly to the processor
without any processing. The following table describes the format of the read
block.
Unformatted
Unformatted Pass-Through Command (Read Block)
Offset
0
1
2
3 to 40
41
Page 122 of 175
Description
9998
Spare
Description
9999
Spare
Description
9996
Number of bytes in Modbus msg
Reserved (always 0)
Modbus message received
9996
MVI56E-MNETR ♦ ControlLogix Platform
Modbus TCP/IP Interface Module with Reduced Data Block
Length
1
41
Length
1
41
Length
1
1
1
38
1
ProSoft Technology, Inc.
June 14, 2011