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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
256
Example: read parameter string of AS-i slave 3(A) on AS-i master 1
Request from fieldbus master to device
Word no.
Value [hex.]
Meaning
1
0822
S=0: sequence here always 0
M=0: AS-i master 1
UID=08: user ID changes e.g. to 8
22 = command number 34
2 0300
03
hex
= 03
dec
= slave address 3(A)
3...18 xxxx
not
used
Response from device to fieldbus master
Word no.
Value [hex.]
Meaning
1
0822
E=0: command processed, no error occurred
S=0: last sequence
08 = reflected command data
22 = reflected command number
2 0608
8608
0xxx/8xxx = the toggle bit TG changes after each execution
x6xx = slave address 3(A) shifted 1 bit to the left
xx08 = ID strings of 8 data bytes have been received
3
1234
34 = parameter byte 0 of slave 3
12 = parameter byte 1 of slave 3
4
5678
78 = parameter byte 2 of slave 3
56 = parameter byte 3 of slave 3
5
1234
34 = parameter byte 4 of slave 3
12 = parameter byte 5 of slave 3
6
5678
78 = parameter byte 6 of slave 3
56 = parameter byte 7 of slave 3
7...18 xxxx
not
changed
