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Device manual AS-i M4 Gateway Profibus DPV1 (AC1375, AC1376)
2012-02-23
DP module 12: extended command channel
Commands in the extended command channel
246
11.3.13
Module 12, extended command 28 (1Chex) – no slave reset
when changing to the protected mode
5739
When changing from the projection mode to the protected mode, all slaves are normally briefly reset
(reset or offline phase). This may lead to problems when the system is running. In such cases the
"deactivation of the slave reset" prevents the short deactivation of the slave outputs during changing of
the operating mode.
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
res. = 0
M
UID
command number = 28
dec
= 1C
hex
2
reserved = 0
reserved = 0
3
reserved = 0
OLP
4...18
not used
not used
Legend:
M
master no.
1 bit
0 = master 1
1 = master 2
UID
user ID
5 bits
00…1F
hex
= 0…31
dec
(a change to the user ID starts the command call)
OLP
offline phase
= slave reset
1 byte
00 = offline phase when changing over to the protected mode
01 = no offline phase when changing over to the protected mode
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
E
B
M
reflected user ID
reflected command number
2
reserved = 0
reserved = 0
3...18
not changed*)
not changed*)
Legend:
E
error bit
1 bit
0 = no error detected
1 = error when executing the command
B
busy
1 bit
0 = command processed, buffer response valid
1 = command in process, channel used
M
master no.
1 bit
0 = master 1
1 = master 2
*)
IMPORTANT:
For the query read only the required bytes!
Unused bytes can contain information of previous queries.
