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5–18
Fault Queue Size
PLC request
N10:0
Drive response
N10:90
* Example only – These values vary depending on parameters and products.
1203–5.5 September 1995
The Fault Queue Size function 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 Structure
PLC Request
Message Length
Header Word 1
3
PLC Decimal Value
Header Word 2
1793
0
Header Word 3
Message Operation
The Fault Queue Size function 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 2 of the response returns a value of
–30975.
Example
In this example, a 1336 PLUS was used. This product has a fault
queue of four storage locations available to store faults. This value
is seen in word 4 of the response header message.
Data File Format
0
1
2
3
1793
0
6
1793
0
4*
Message Length
PLC Decimal Value
1793 –– Message OK
–30975 –– Message Error
Fault Queue Size
3
4
5
Drive Response
Header
5
Word 1
Header
Word 2
Data
0
Word 3
Data
Word 4
6
7
8
9
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