1.3 State Transition Diagram
1-4
1.3
State Transition Diagram
The master and slave station state transitions are shown in the following diagrams.
Phase
Abbreviation
Description
1
P1
Waiting for establishment of connection.
2
P2
Asynchronous communications enabled. Only asynchronous commands can
be used.
3
P3
Synchronous communications enabled. Both synchronous and asynchronous
commands can be used.
S
tart
Ma
s
ter
S
tation
S
tate Tran
s
ition
S
lave
S
tation
S
tate Tran
s
ition
S
tart
P1/ Wait
s
for connection e
s
tabli
s
hment
P2/ A
s
ynchronou
s
communication
s
s
tate
P
3
/
S
ynchronou
s
communication
s
s
tate
S
end
s
CONNECT
(A
s
ynchronou
s
communication
s
)
Communication
s
error
S
end
s
S
YNC_
S
ET
S
end
s
CONNECT
(
S
ynchronou
s
communication
s
)
Communication
s
error
Power ON
P1/ Wait
s
for connection e
s
tabli
s
hment
P2/ A
s
ynchronou
s
communication
s
s
tate
P
3
/
S
ynchronou
s
communication
s
s
tate
Power ON
Communication
s
error
Receive
s
S
YNC_
S
ET
Receive
s
CONNECT
Receive
s
CONNECT
(A
s
ynchronou
s
communication
s
)
Communication
s
error
Receive
s
DI
S
CONNECT
Communication
s
error
Receive
s
DI
S
CONNECT