ProSoft MVI69E-MBS - Slave Polling Status Blocks (3002 to 3006, 3102 to 3106)

MVI69E-MBS ♦ CompactLogix Platform Reference
Modbus Serial Enhanced Communication Module User Manual
ProSoft Technology, Inc. Page 127 of 154
June 28, 2017
7.4.4 Slave Polling Status Blocks (3002 to 3006, 3102 to 3106)
Blocks 3002 to 3006: Port 1 Slave Status
Blocks 3102 to 3106: Port 2 Slave Status
Two arrays are allocated in the module’s primary object to hold the polling status
of each slave on the Master ports. You can use this status data to determine
which slaves are currently active on the port, in communication error, or have
their polling suspended and disabled.
Block 3002 to 3006 or 3102 to 3106: Request from Processor to Module
Offset
Description
0
Write Block ID: 3002 to 3006 for Port 1 and 3102 to 3106 for Port 2 slave polling
status request.
1 to (n-1)
Spare
Where n = 60, 120, or 240 depending on the Block Transfer Size parameter.
Block 3002 to 3006 or 3102 to 3106: Response from Module to Processor
Offset
Description
0
Read Block ID: 3002 to 3006 or 3102 to 3106 requested by the processor.
1
Write Block ID: To be used by the processor in its next Write block.
2
Slave ID offset: Index of first slave in block
3
Number of slaves in this block
4 to 61
Slave polling status data
62 to (n-1)
Spare
Slave Status values
Value
Description
0
OK
1
Exceeded retry count and in error delay count mode
2
Block 3000 or 3100