Structure - WAGO -I/O-SYSTEM 750 Series Manual
Fieldbus independent i/o modules,
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2.1.1.7.4.1
Structure
Byte
...
36
Opcode Command code for the mailbox order
T
O
A/B
Byte
...
34
Opcode Mirrored command code for the mailbox order
T
Result
In most cases, the mailbox will not have the full length in order to provide
space for the AS-Interface process data.
WAGO-I/O-SYSTEM 750
I/O Modules
Mailbox request
7
6
5
2
2
2
1
2
T
O
A/B
3
Request parameter byte 1
Request parameter byte 34
Toggle flag
Order flag
(for mailbox orders
with bit information)
Slave changeover
(for 6-byte mailbox
orders with bit
information)
Channel changeover
(for 6-byte mailbox
orders with word
information)
Mailbox response
7
6
5
2
2
2
1
Opcode (mirrored)
2
T
3
Response parameter byte 1
Response parameter byte 32
Toggle flag
A mailbox order is acknowledged when a change occurs.
Status / error in the mailbox order
750-655 [AS-Interface master module]
4
3
2
1
2
2
2
2
Opcode
-
...
A mailbox order is started when a change occurs.
0 Bits are stored in parameter bytes in ascending order
(default value).
1 Bits are stored in parameter bytes in descending order.
0 A-slave data are transmitted before B-slave data.
1 B-slave data are transmitted before A-slave data.
0 Analog values are transmitted in the order Channel 1,
Channel 2, Channel 3, Channel 4.
1 Analog values are transmitted in the order Channel 3,
Channel 4, Channel 1, Channel 2.
4
3
2
1
2
2
2
2
Result
...
Process image
0
2
0
2
• 29
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