Specifications - Mitsubishi Electric MELSEC-F FX3U-CAN User Manual

FX -CAN User's Manual
3U
2.

Specifications

DESIGN PRECAUTIONS
• Make sure to have the following safety circuits outside of the PLC to ensure safe system operation even during external power supply
problems or PLC failure.
Otherwise, malfunctions may cause serious accidents.
1) Most importantly, have the following: an emergency stop circuit, a protection circuit, an interlock circuit for opposite movements
(such as normal vs. reverse rotation), and an interlock circuit (to prevent damage to the equipment at the upper and lower
positioning limits).
2) Note that when the PLC CPU detects an error, such as a watchdog timer error, during self-diagnosis, all outputs are turned off.
Also, when an error that cannot be detected by the PLC CPU occurs in an input/output control block, output control may be
disabled.
External circuits and mechanisms should be designed to ensure safe machinery operation in such a case.
• For the operating status of each node in the case of a communication error, see the FX
manual of each node.
Erroneous output or malfunctions may cause an accident.
• When executing control (data changes) to an operating PLC, construct an interlock circuit in the sequence program so that the entire
system operates safely. In addition, when executing control such as program changes and operation status changes (status control)
to an operating PLC, carefully read the manual and sufficiently confirm safety in advance. Especially in control from external
equipment to a PLC in a remote place, problems in the PLC may not be able to be handled promptly due to abnormality in data
transfer. Construct an interlock circuit in the sequence program. At the same time, determine the actions in the system between the
external equipment and the PLC for protection against abnormalities in data transfer.
DESIGN PRECAUTIONS
• Make sure to observe the following precautions in order to prevent any damage to the machinery or accidents due to abnormal data
written to the PLC under the influence of noise:
1) Do not bundle the main circuit line together with or lay it close to the main circuit, high-voltage line or load line.
Otherwise, noise disturbance and/or surge induction are likely to take place. As a guideline, lay the control line at least 100mm
(3.94") or more away from the main circuit or high-voltage lines.
2) Ground the shield wire or shield of a shielded cable.
Do not use common grounding with heavy electrical systems (refer to the manual of the PLC main unit).
DISPOSAL PRECAUTIONS
• Please contact a certified electronic waste disposal company for the environmentally safe recycling and disposal of your device.
TRANSPORTATION AND
STORAGE PRECAUTIONS
• The PLC is a precision instrument. During transportation, avoid impacts larger than those specified in the general specifications of the
PLC main unit manual by using dedicated packaging boxes and shock-absorbing palettes.
Failure to do so may cause failures in the PLC. After transportation, verify operation of the PLC and check for damage of the mounting
part, etc.
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2 Specifications
-CAN user's manual and the product
3U