Communication Phases; Synchronization; 12.2.3.1.1 Mailbox Commands; Table 63: Commands - WAGO MOVILINK SPEEDWAY 767 Manual

WAGO-SPEEDWAY 767
767-5204 MOVILINK® Interface (RS-232, RS-485)
12.2.3

Communication Phases

The Mailbox 2.0 mechanism defines two communication phases:
•

Synchronization

• Data exchange
Only after successful synchronization from sender to receiver the actual user data
can be exchanged.
12.2.3.1 Synchronization
In the synchronization phase, the handshake byte is used in Control mode.
A distinction is made between interpretation as signaling mode and interpretation
as command acknowledgement mode.
In command acknowledgement mode, the handshake byte appears as follows:
Status Nibble
Bit 3
0
The Control nibble is used to transfer a request while the Status nibble contains
the response to the request.

12.2.3.1.1 Mailbox Commands

The following commands are defined:

Table 63: Commands

Value Explanation
0 INVALID
1 HOLD REQUEST
2 RESET REQUEST
3 ... 7 -
Manual
Version 1.1.0
Bit 2 Bit 1 Bit 0
Acknowledgement
Control Nibble
Bit 3 Bit 2 Bit 1
0 Acknowledgement
Description
Signals that the sender has not started operations again after a
reset.
Notice that the channel is ready, but data is not currently
being transferred
(e.g. because the output buffer is still empty)
Prompt to reset
(not supported, ignore)
Appendix 109
Bit 0