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
324
12.8.1
Acyclic command 00 – execute no command
5859
Request from fieldbus master to device
Bit
Offset
Word no.
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
1
UID
command request = 65
hex
2
reserved = 0
command number = 00
dec
= 00
hex
3...19
not used
not used
Legend:
UID
user ID
1 byte
00…FF
hex
= 0…255
dec
Response from device to fieldbus master
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
reserved = 0
reflected command number
3...19
not changed*)
not changed*)
*)
IMPORTANT:
For the query read only the required bytes!
Unused bytes can contain information of previous queries.
Example:
execute no command
Request from fieldbus master to device
Word no.
Value [hex.]
Meaning
1
0365
03 = user ID changes e.g. to 3
65 = command request
2
0000
00 = command number 0
3...19 xxxx
not
used
Response from device to fieldbus master
Word no.
Value [hex.]
Meaning
1
036F
03 = reflected user ID
6F = command status is "done" (no error)
2
0000
reflected command number
3...19 xxxx
not
changed
