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4.A2CCPU
- - - - - - - - - - - - - - - - - - - MELSEC-A
(c) Processing at detection of faulty remote module
1) If communication is stopped due to a faulty remote module,
outputs of the modules are as follows:
o
A2C I/O module: OFF
iO Remote I/O module for MINI-53: Depends on EC mode
2) The output state as obtained by running the sequence program
is restored by removing the error cause in the faulty station and
by resetting the A2C with the RUN key switch or changing the
operation status of the A2C from STOP to RUN.
(d) Processing at an occurrence of transmission underrun error
1) If the transmission underrun error occurs, data communication
stops.
In this case, outputs of the module are as indicated
below.
o
A2C I/O module: OFF
iO Remote I/O module for MINI-53: Depends on EC mode
2) Communications start when the following operation is carried
out.
o
Turn OFF the power to the A2C and turn it back ON.
iO Reset the A2C.
iii) Change the operation mode from STOP to RUN.
(e) Processing at an occurrence of receive underrun error
1) If receive underrun error occurs, the same processing as ex-
ecuted at an occurrence of disconnected line error is executed.
2) Communications start when the following operation is carried
out.
o
Turn OFF the power to the A2C and turn it back ON.
iO Reset the A2C.
iiO Change the operation mode from STOP to RUN.
(3)
Remote terminal error
The remote terminal error indicates an error in which communications
between the A2C and a remote terminal connected to the A2C cannot
be executed correctly. If the remote terminal error, with an exception
of the initial setting error, occurs, the M9060 is set and the error code
is stored in 09180 to 09193.
Remove the cause of the error for the faulty terminal module.
4-46
I

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