As-Interface Process Data - WAGO -I/O-SYSTEM 750 Series Manual

Bit 2
With register communication, bit 2
Byte
Register communication is acknowledged by the bus module with bit 2
status byte.
2.1.1.7.3

AS-Interface process data

In the data field of the AS-Interface process data, the data for (or from) 2
slaves are transmitted with each byte. In doing so, the data for the slave with
the higher address are located in the lower value nibble.
The main EC (Execution Control) flags or control bits are transmitted in place
of slave 0, with which the master does not exchange any process data.
Byte
offset
Depending on the process image length, mailbox length and mailbox mode, it
may be that not all AS-Interface process data are transmitted (cf. Chapter
2.1.1.7.1 "Overview process image").
WAGO-I/O-SYSTEM 750
I/O Modules
6
(R/W) in the control byte determines the register read or write access.
7 6
2 2
1 1 —
AS-Interface process data
7 6
2 2
Flags
0
F3 F2
1 Slave 2/2A
... ...
14 Slave 28/28A
15 Slave 30/30A
16 Reserved
17 Slave 2B
... ...
30 Slave 28B
31 Slave 30B
750-655 [AS-Interface master module]
7
in the control byte is always set.
Status byte
5 4 3
2 2 2
Register number
5 4 3
2 2 2
F1 F0 D3
Process image
2 1 0
2 2 2
2 1 0
2 2 2
Slave 1/1A
D2 D1 D0
Slave 3/3A
...
Slave 29/29A
Slave 31/31A
Slave 1B
Slave 3B
...
Slave 29B
Slave 31B
• 27
7
in the