Festo CESA-GW-AS-PB, Installation And Operation Owner'S Manual

Page: 63 / 78

CESA-GW-AS-PB Description
62
7.1.3.4 Command interface
Only using the IDs of the process data field the PROFIBUS gateway can be used
as M0 AS-i master. By using the command interface (see chap. <DP/V1>) the
functions of a M3 master become available.
A command of the command interface will be edited if the toggle bit T
1
has
changed. This way the same command can be used repeatedly.
16-bit data
byte
2
7
2
6
2
5
2
4
2
3
2
2
2
1
2
0
1 slave 31-n/8, channel 1, high byte
2 slave 31-n/8, channel 1, low byte
3 slave 31-n/8, channel 2, high byte
4 slave 31-n/8, channel 2, low byte
… …
n-3 slave 31, channel 3/slave 31B, channel 1, high byte
n-2 slave 31, channel 3/slave 31B, channel 1, low byte
n-1 slave 31, channel 4/slave 31B, channel 2, high byte
n slave 31, channel 4/slave 31B, channel 2, low byte
Tab. 7-17.
Request
byte
2
7
2
6
2
5
2
4
2
3
2
2
2
1
2
0
1 command
2 T circuit
3 request parameter byte 1
… …
36 request parameter byte 34
Answer
byte
2
7
2
6
2
5
2
4
2
3
2
2
2
1
2
0
1 command (mirrored)
2 result
3 response parameter byte 1
… …
34 response parameter byte 32
Tab. 7-18.
1. A T bit (toggle bit) is only needed to execute two commands directly one after the other.