Mitsubishi 900 Series User Manual page 5

[Test Operation Precautions]
• Before performing test operation (bit device on/off, word device's present value changing,
timer/counter's set value and present value changing, buffer memory's present value changing)
for a user-created monitor screen or system monitoring, read the manual carefully to fully
understand how to operate the equipment.
During test operation, never change the data of the devices which are used to perform
significant operation for the system.
False output or malfunction can cause an accident.
[Startup/Maintenance Precautions]
• When power is on, do not touch the terminals.
Doing so can cause an electric shock or malfunction.
• Before starting cleaning or terminal screw retightening, always turn the power OFF before
starting cleaning or terminal screw retightening.
Not switching the power off in all phases can cause a module failure or malfunction.
Undertightening can cause a short circuit or malfunction.
Overtightening can cause a short circuit or malfunction due to the damage of the screws or
module.
• Do not disassemble or modify the module.
Doing so can cause a failure, malfunction, injury or fire.
• Do not touch the conductive and electronic parts of the module directly.
Doing so can cause a module malfunction or failure.
• The cables connected to the module must be run in ducts or clamped.
Not doing so can cause the module or cable to be damaged due to the dangling, motion or
accidental pulling of the cables or can cause a malfunction due to a cable connection fault.
• When unplugging the cable connected to the module, do not hold and pull the cable portion.
Doing so can cause the module or cable to be damaged or can cause a malfunction due to a
cable connection fault.
A - 4
DANGER
!
DANGER
!
CAUTION
!
A - 4