Slave Polling Status Blocks (3002 To 3006, 3102 To 3106) - ProSoft Technology CompactLogix MVI69E-MBS User Manual

MVI69E-MBS ♦ CompactLogix™ Platform
Modbus Serial Enhanced Communication Module

8.4.4 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
Description
Offset
Write Block ID: 3002 to 3006 for Port 1 and 3102 to 3106 for Port 2 slave polling
0
status request.
Spare
1 to (n-1)
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
Description
Offset
Read Block ID: 3002 to 3006 or 3102 to 3106 requested by the processor.
0
Write Block ID: To be used by the processor in its next Write block.
1
Slave ID offset: Index of first slave in block
2
Number of slaves in this block
3
Slave polling status data
4 to 61
Spare
62 to (n-1)
Slave Status values
Description
Value
OK
0
Exceeded retry count and in error delay count mode
1
Block 3000 or 3100
2
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Reference
User Manual
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