ifm
Device manual AS-i M4 Gateway Profibus DPV1 (AC1375, AC1376)
2012-02-23
Acyclic services for Profibus DPV1
Acyclic command in the DPV1 command channel
373
Response from device to fieldbus master in the normal case
Bit
Offset
Word no.
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
1
reflected user ID
Command status (
→
page
) = 6F
hex
2
TG
L32
reserved = 0
F=0
reflected command number
3
parameter byte 1
parameter byte 0
4...16
parameter bytes 2...27
17
parameter byte 29
parameter byte 28
18
parameter byte 31
or:
number of bytes read
parameter byte 30
19
not changed*)
not changed*)
Legend:
TG
toggle bit
1 bit
value changes for each execution of the command
L32
32 parameter bytes
1 bit
0 = number of bytes read is < 32
dec
high byte in word 18 contains the number of read bytes
1 = number of read bytes is = 32
dec
high byte in word 18 contains parameter byte 31
F
error bit
1 bit
0 = no error detected
1 = error when executing the command
*)
IMPORTANT:
For the query read only the required bytes!
Unused bytes can contain information of previous queries.
