State Transition Diagram - YASKAWA S-7 Series Command Manual

1.3 State Transition Diagram

1.3

State Transition Diagram

The master and slave station state transitions are shown in the following diagrams.
Phase
1
2
3
1-4
P1/ Waits for connection establishment
Sends CONNECT
(Asynchronous communications)
(Synchronous communications)
P3/ Synchronous communications state
Master Station State Transition
P1/ Waits for connection establishment
(Asynchronous communications)
Receives CONNECT
P3/ Synchronous communications state
Slave Station State Transition
Abbreviation
P1 Waiting for establishment of connection.
Asynchronous communications enabled. Only asynchronous commands can
P2
be used.
Synchronous communications enabled. Both synchronous and asynchronous
P3
commands can be used.
Start
Power ON
Sends CONNECT
P2/ Asynchronous
communications state
Sends SYNC_SET
Start
Power ON
Communications
Receives CONNECT
Communications
error
P2/ Asynchronous
communications state
Receives SYNC_SET
Communications
Description
Communications
error
Communications
error
error
Receives
DISCONNECT
Receives DISCONNECT
error