Table of Contents
B–20
Supported Block Transfer Messages
Fault Queue Size Read
0
PLC request
3
Drive response
4
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Fault Queue Size Read gets the number of fault entries allowed in
the fault queue.
PLC Block Transfer Instruction Data
PLC request instruction length: 3 words
Drive response instruction length: 4 words
Figure B.13
PLC Request
Message Length
3
PLC Decimal Value
1793
0
Message Operation
Fault Queue Size Read 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
1
2
3
1793
0
1793
0
4*
* Example only — These values vary depending on parameters and products.
Message Structure
Header Word 0
Message Length
Header Word 1
PLC Decimal Value
1793 — Message OK
–30975 — Message Error
Header Word 2
Fault Queue Size
4
5
6
Drive Response
Header
4
Word 0
Header
Word 1
Header
0
Word 2
Data
or Error Code
Word 3
7
8
9
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