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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
254
Example: read diagnostic string of AS-i slave 3(A) on AS-i master 1
Request from fieldbus master to device
Word no.
Value [hex.]
Meaning
1
0721
S=0: sequence here always 0
M=0: AS-i master 1
UID=07: user ID changes e.g. to 7
21 = command number 33
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
0721
E=0: command processed, no error occurred
S=0: last sequence
07 = reflected user ID
21 = 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
2D01
01 = diagnostic byte 0 of slave 3
2D = diagnostic byte 1 of slave 3
4
0203
03 = diagnostic byte 2 of slave 3
02 = diagnostic byte 3 of slave 3
5
1122
22 = diagnostic byte 4 of slave 3
11 = diagnostic byte 5 of slave 3
6
3344
44 = diagnostic byte 6 of slave 3
33 = diagnostic byte 7 of slave 3
7...18 xxxx
not
changed
