Control And Status Byte; Assignment For Process Data Communication - WAGO -I/O-SYSTEM 750 Series Manual

PI
12
20
24
32
40
48
PI
C/S
PD
SL
The standard setting is a process image length of 24 bytes and a mailbox
length of 6 bytes. This results in an AS-Interface process data length of 16
bytes, i.e. 31 slaves can be read out.
2.1.1.7.2

Control and status byte

The bus master switches between process data communication and register
communication with bit 2
The changeover is acknowledged by the bus module with bit 2
byte.
2.1.1.7.2.1

Assignment for process data communication

With process data communication, the control and status bytes are assigned as
follows:
Byte
mbx
The superimposition of the mailbox is activated and deactivated with bit 2
the control byte.
With process data communication, bit 2
WAGO-I/O-SYSTEM 750
I/O Modules
C/S
0 byte 6 byte
PD SL PD
2 10 19 4
2 18 34 12
22 42
2 16
2 30 58 24
2 38 62 32
2 46 62 40
Length of process image that can be set
Number of status and control bytes (incl. filler bytes)
Length of AS-Interface process data
Number of transferable slaves
7 6
2 2
1 0 0
0 Mailbox suppressed
1 Mailbox superimposed
750-655 [AS-Interface master module]
Mailbox length
10 byte 12 byte
SL PD SL PD
7 0 0 -
23 8 15 6
12 23 10
31
46 20 38 18
62 28 54 26
62 36 62 34
7
in the control byte.
Control byte
5 4 3
2 2 2
mbx 0 0
7
in the control byte is always reset.
Process image
18 byte
SL PD SL
- - -
11 0 0
19 4 7
34 12 23
50 18 38
62 28 54
7
in the status
2 1 0
2 2 2
0 0 0
• 25
5
in