Operation, Maintenance and Inspection 8
8-1
8. Operation, Maintenance and Inspection
8.1 Before Starting Operation
Check the following items before starting operation.
8.1.1 System design
Check the machine with regard to the following items to ensure that a suitable motor is
selected.
Load torque, Load inertia, Acceleration/deceleration time, Operation speed, Stopping accu-
racy, Operation frequency, etc.
8.1.2 Preliminary inspection (Turn OFF the power.)
Incorrect connection of the power supply terminal, contact between a DC input line and a
power line, a short-circuit in the output wiring, etc. can cause serious damage.
Before turning ON the power, make sure that the power supply and the ground are correctly
connected and the I/O lines are correctly wired.
Measure the withstand voltage and the insulation resistance of the positioning unit using the
following procedure.
1) Disconnect all the I/O wiring and the power line of the positioning unit.
2) Connect all the terminals except the ground terminal of the positioning unit with a jumper
wire while the positioning unit is not connected to any other unit.
3) Measure the voltage and the resistance between the jumper wire and the ground terminal.
Withstand voltage : 500V AC, 1 minute (FX
2N
-10GM, FX
2N
-20GM)
Insulation resistance: 5 M
Ω
or more by 500V DC Program check.
8.1.3 Program check (Turn ON the power, and set the positioning unit to the MANU mode.)
Write a program using a peripheral unit (Release the write-protect switch of the EEPROM in
the FX
2N
-20GM.)
After that, read the program and check whether it is correctly written, and check the program
and the parameters using the program check function of the peripheral unit.
• Thoroughly read the manual, sufficiently confirming safety, then perform returning to the
zero point in the MANU/AUTO mode, jog operation, step operation or automatic operation.
Erroneous operation may damage the unit or cause accidents.
FX Series Positioning Controllers
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