10.1.3.1.2 Acknowledgement; 10.1.3.1.3 Signaling; Table 30: Acknowledgement; Table 31: Structure Of The Handshake Byte - WAGO -I/O-SYSTEM 750 Manual

76 Appendix

10.1.3.1.2 Acknowledgement

The following acknowledgements are defined:

Table 30: Acknowledgement

Value Explanation
0 INVALID
1 HOLD ACKNOWLEDGE Signal or confirmation that the channel is ready, but data is
2 RESET ACKNOWLEDGE Response to "RESET REQUEST" when Mailbox in reset.
3 ... 7 -

10.1.3.1.3 Signaling

In signal mode, the handshake byte appears as follows:

Table 31: Structure of the Handshake Byte

Bit 7 Bit 6
0

Table 32: Signaling

Value
0x00
0x32
0x33
(other)
Handshake byte
Bit 5 Bit 4 Bit 3
0 Signal
Explanation
INVALID SIGNAL
RESET SIGNAL
ERROR SIGNAL
-
Description
Signals that the receiver has not started operations again after
a reset.
not currently being transferred (e.g. because there is not any
data yet).
(not supported, ignore)
Bit 2 Bit 1 Bit 0
Description
State of the process image with no effect by Mailbox 2.0
Shows that the local Mailbox is in the process of
restarting
Shows that the local Mailbox is in the fault condition
Other values are not considered as signals and are
processed separately in the Status or Control nibble.
Version 1.2.0, valid from FW/HW-Version 01/01
WAGO-I/O-SYSTEM 750
750-658 CAN Gateway
Manual