IDEC FC6A-C16K1CE Communications Manual page 174

8: J1939 C
OMMUNICATION
Communication Control Status Transitions
J1939 communication status and initialization processing transitions are as follows.
(1) Start user program execution
While offline
(M8301=off)
(1) The offline status is set immediately after starting execution of the user program.
When M8300 is turned on, the online status is set and initialization processing is performed.
(2)
Before acquiring the local address in initialization processing, the address is the address unconfirmed status (M8302=off).
(3) When a local address is confirmed between 0 and 253, the status is the address confirmed status (M8302=on).
Messages can be exchanged between the MicroSmart and CAs. If the local address is 254, the status remains the address
unconfirmed status.
When an address conflict occurs and the local address is 254 (null address), the status is the address unconfirmed status.
(4)
When M8300 is turned off, communication processing is stopped and the offline status is set.
(5)
The offline status is also set when bus off occurs during communication (M8304 is turned on). M8300 remains off at this time.
To set the online status again, turn off M8300 and then turn it on again.
8-6
(2) J1939 communication
(5) J1939 communication
prohibited (M8300 is off)
FC6A S M S A
ERIES ICRO MART
permitted
(M8300 is turned on)
or
bus off (M8304 is on)
- -O T C
LL IN NE YPE OMMUNICATION
While online
(M8301=on)
Address unconfirmed
(M8302=off)
(4) (3)
Address conflict Address confirmed
Address confirmed
(M8302=on)
M FC9Y-B1730
ANUAL