Rockwell Automation 1203-CN1 ControlNet Communications Module 1203-CN1 - Manual (Page 136)

Publication 1203-5.13 – February, 2002
F-18 Supported Emulated Block Transfer Commands: Fault Queue Size
Fault Queue Size Fault Queue Size gets the number of fault entries allowed in the fault
queue.
PLC Block Transfer Emulation Instruction Data
PLC request instruction length: 3 words
Drive response instruction length: 4 words
Message Operation
Fault Queue Size reads back the size of the fault queue available in
the product. Each product may have a different number of fault queue
entries available for storage.
If an error has occurred, word 1 of the response returns a value of
-30975.
Example
In this example, a 1336 PLUS drive was used. This product has a fault
queue of four storage locations available to store faults. This value is
seen in word 3 of the response header message.
Data File Format
* Example only - These values vary depending on parameters and products.
Header
Word 0
PLC Decimal Value
1793
Message Structure
Header
Word 1
Header
Word 2
PLC Request
Header Word 0
Header Word 1
Header Word 2
Message Length
Message Length
PLC Decimal Value
1793 -- Message OK
-30975 -- Message Error
0
Drive Response
3
0
5
Data
Word 3
Fault Queue Size
0 1 2 3 4 5 6 7 8 9
PLC request 3 1793 0
Drive response 6 1793 0 4*