User Manual

Table Of Contents
I/O Modules 49
Special Modules
WAGO-I/O-SYSTEM 750
I/O Modules
PIO Processing Times PII
Cyclically updated process data
[XX.XX.XX.XX.XX.XX.XX.XX.XX.XX].00.00
Cyclically updated process data
[XX.XX.XX.XX.XX.XX.XX.XX.XX.XX].00.00
Switching on the mailbox, mailbox command IDLE
(0x00)
[XX.XX.XX.XX].[00.00.00.00].[00.00].00.20
Response to mailbox command IDLE
(0x00)
[XX.XX.XX.XX].[00.00.00.00].[00.00].00.60
Request for mailbox command GetLinkSignal-
Strength (0xD7)
[XX.XX.XX.XX].[00.00.00].[20].[00.D7].00.20
This queries the receive signal strength for the first slot.
The mailbox includes:
Opcode
0xD7
Toggle byte
0x00
Argument
0x20 (Slot 1)
Filling byte
0x00 (for unused mailbox bytes)
..
Response to mailbox command GetLinkSignal-
Strength
(0xD7)
[XX.XX.XX.XX].[00.00.00].[1B].[00.D7].00.60
Response to the query:
Opcode (mirrored)
0xD7
Toggle bit, return value
0, 0x00
Argument
0x1B (value of the signal
strength of the queried
slot)
Filling byte
0x00 (for unused mailbox
bytes)
Request for mailbox command GetLinkSignal-
Strength
(0xD7)
[XX.XX.XX.XX].[00.00.00].[28].[80.D7].00.20
This queries the receive signal strength with a false
argument. The mailbox includes:
Opcode
0xD7
Toggle byte
0x80 (toggle bit set to execute new
command)
Argument
0x28 (invalid)
Filling byte
0x00 (for unused mailbox bytes)
.
Response to mailbox command GetLinkSignal-
Strength
(0xD7)
[XX.XX.XX.XX].[00.00.00.00].[83.D7].00.60
Response to the query:
Opcode (mirrored)
0xD7
Toggle bit, return value
1, 0x03
Argument No argument since invalid
call up
Filling byte
0x00 (for unused mailbox
bytes)
Since an invalid index was used with 0x28, there are no
arguments in the response.
Cyclically updated process data (mailbox masked)
[XX.XX.XX.XX.XX.XX.XX.XX.XX.XX].00.00
Cyclically updated process data (mailbox masked)
[XX.XX.XX.XX.XX.XX.XX.XX.XX.XX].00.00
Figure 17: Example of mailbox communication g064416d