Memory Configuration And Data Operation - Mitsubishi FX3U-20SSC-H User Manual

FX -20SSC-H Positioning Block User's Manual
3U
6.

Memory Configuration and Data Operation

DESIGN PRECAUTIONS
• Observe the following items. Failure to do so may cause incorrect data-writing by noise to PLCs and result the PLC failure, machine
damage or an accident.
1) Do not lay close or bundle with the main circuit line, high-voltage line, or load line.
Noise and Surge induction interfere with the system operation.
Keep a safe distance of least 100 mm (3.94") from the above lines during wiring.
2) Ground the shield wire or shield of a shielded cable at one point on the PLC. However, do not ground at the same point as high
voltage lines.
• Install in a manner which prevents excessive force from being applied to the built-in connectors dedicated to programming, power
connectors and I/O connectors.
Failure to do so may result in wire breakage or failure of the PLC.
STARTUP AND MAINTENANCE
PRECAUTIONS
• Do not touch any terminal while the PLC's power is on.
Doing so may cause electrical shock or malfunctions.
• Before cleaning or retightening terminals, externally cut off all phases of the power supply.
Failure to do so may expose you to shock hazard.
• Before modifying the program under operation or performing operation for forcible output, running or stopping, carefully read the
manual, and sufficiently ensure the safety.
An operation error may damage the machine or cause accidents.
• To test Zero-return, JOG operation and Positioning data, throughly read this manual, ensure the safe system operation
An operation error may damage the machine or cause accidents.
STARTUP AND MAINTENANCE
PRECAUTIONS
• Do not disassemble or modify the PLC.
Doing so may cause failures, malfunctions or fire.
* For repair, contact your local Mitsubishi Electric distributor.
• Before connecting or disconnecting any extension cable, turn off power.
Failure to do so may cause unit failure or malfunctions.
• Before attaching or detaching the following devices, turn off power.
Failure to do so may cause device failure or malfunctions.
- Peripheral devices, expansion boards and special adapters
- I/O extension blocks/units and terminal blocks
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6 Memory Configuration and Data Operation