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5 Checking Power Supply
Check that the power supply runs normally after configuring the system, mounting modules, and
wiring.
1. Check before turning ON the power supply.
• Wiring of the power supply
• Power supply voltage
2. Set the CPU module to STOP.
Set the switch on the front of the CPU module to STOP.
3. Supply power.
4. Check that the power supply runs normally.
Check the front LEDs on each module.
The following shows the normal state of the LEDs.
1 Power supply module: "POWER" LED lights in
green.
2 CPU module: "MODE" LED lights in green.
Construction of the system is complete.
Turn OFF the power supply.
Troubleshooting
1 When the "POWER" LED, "MODE" LED are OFF or flashing, refer to the following page.
Troubleshooting (P.28)
2 When a parameter or program is not written to the CPU module,
the "ERR." LED flashes red, but it is not a problem at this stage.
"ERR." LED
flashes red.
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