Mitsubishi FX3G-14MR/ES, Руководство по установке

Страница: 22 / 24

FX3G INSTALLATION MANUAL
22
n
24VDC INPUT DOES NOT OPERATE
1. Input does not turn on.
Disconnect the external wiring and connect the S/S terminal and the
0V terminal or the 24V terminal. Short-circuit the 0V terminal or 24V
terminal not connected to the S/S terminal and the input terminal,
then check the input display LED or a peripheral device to confirm
that the input turns on.
Measures
When input turns on
Check that the input device does not have a built-in diode or
parallel resistance. .
When input does not
turn on
Measure the voltage between the 0V terminal or 24V
terminal not connected to the S/S terminal and the input
terminal with a tester to confirm that the voltage is 24VDC.
• Check the configuration of the external wiring and
connected devices and the connection of the extension
cables.
2.
Input does not turn off.
Check for leakage current from input devices.
If the leakage current is larger than 1.5mA, it is necessary to connect
a bleeder resistance.