Mitsubishi MELSEC-F FX2N-1RM-E-SET, User Manual

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Specifications 3
3-1
FX
2N
-1RM-E-SET Programmable Cam Switch
3. Specifications
This section describes the specifications of the FX
2N
-1RM and the resolver.
Cautions on design
• Provide a safety circuit outside the PLC so that the entire system can operate
conservatively in any case even if an error has occurred in the external power supply or
a failure has occurred in the PLC.
If a safety circuit is not provided, an accident may occur caused by malfunction or
erroneous output.
1 ) Make sure to construct a circuit outside the PLC as to an emergency stop circuit, a
protection circuit, an interlock circuit for reverse operations such as normal rotation
and reverse rotation and an interlock circuit to prevent mechanical damages such as
for upper and lower limits for positioning.
2 ) When the PLC CPU has detected an abnormality by the self-diagnosis function such
as a watchdog timer error, all the outputs are turned off. When an abnormality has
occurred in the I/O control area, etc. which cannot be detected by the PLC CPU, the
output control may be disabled.
Design the external circuit and the mechanism so that the machine can operate
conservatively in such cases.
3 ) The output current of the service power supply for the sensor varies depending on the
model and existence of extension blocks. If overload has occurred, the voltage is
automatically dropped, the input to the PLC is disabled, and all the outputs are turned
off.
Design the external circuit and the mechanism so that the machine can operate
conservatively in such a case.
4 ) When a failure has occurred in a relay, transistor, TRIAC, etc. in the output unit, the
output may be kept turned ON or OFF.
Design the external circuit and the mechanism so that the machine can operate
conservatively with regard to an output signal which may lead to a serious accident.