Mitsubishi Electric Melsec A Series - Page 76

I
4.A2CCPU
-------------------- MELSEC·A
(b) Automatic online return not provided
In this mode, data communication is executed between
the A2C and
a remote I/O module
and remote terminal module.
II a communication error occurs with any
01 the modules in the link,
data communication is executed only with modules operating cor-
rectly.
Once a module is disconnected
Irom the link, it cannot restart data
communications when it recovers normal operating state.
To restart data communication with a module disconnected
Irom
the link, turn off the power to A2C and then turn it back on again or
reset it with the RUN key switch.
(c) Transmission
stop at an occurrence 01 online error
1) II data communication error
occurs with anyone 01 the stations
in the link, data communication stops over
the entire link. •
To restart data communication in the link,
turn off the power to
A2C
and then turn it back on again or reset it with the RUN key
switch.
2) The setting
lor the total number 01 stations should be the last
station number 01 remote I/O modules and remote terminal
modules connected to the A2C.
If a number is greaterthan the last station number, such a station
is regarded as the
laulty station precluding data communication.
(7) Remote terminal
The remote terminal setting is necessary to use remote terminals
modules (up to
14 modules); the setting includes the station number
and attribute.
(a) First station
number
The head station number (station number set with the station num-
ber setting switch) 01 the remote terminal modules to be used
should be set
lor the station number.
(b) Protocol
Set attribute
lor each remote terminal module.
•
1) Mitsubishi standard protocol (MINI protocol)
Setting
lor remote terminal modules other than RS-232C inter-
lace module (AJ35PTF-R2) should be the Mitsubishi standard
protocol.
2) No-protocol
Setting
lor an RS-232C interlace module (AJ35PTF-R2) should •
be
the no-protocol. ..
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