Yaskawa 120 Vac Digital Input - Manual (Page 21)

YASKAWA TOEP YEAOPT 07 A1000 Option DI-101 120 Vac Interface Installation Manual 21
6 Troubleshooting
6 Troubleshooting
Troubleshooting tips are provided below. Verify these points if the drive performance is not
as expected after installing the option:
• Verify all wire connections are tight.
• Verify all DI-101 PCB Fingers are fully inserted into the A1000 TB1 drive terminals and
the terminals are fully tightened.
• Verify the factory installed wire jumper is installed between A1000
TB1 terminals SC to SP.
• Verify the signal is present at the DI-101 option input terminals by using an AC voltmeter
to measure for a 120 Vac input signal is present on any activated terminals S1 thru S8 with
respect to the X2 terminal.
• Verify the digital input is recognized by the drive by viewing Input Terminal Status
monitor parameter U1-10.
• Verify the drive Multi-Function Digital Input parameters (H1-01 through H1-08) of the
drive are set correctly for the expected S1 to S8 input terminal behavior.
Preventing Noise Interference
Take the following steps to prevent erroneous operation caused by conducted electrical noise
interference:
• Use shielded wire for the signal lines less than 24 V.
• Limit the length of I/O signal wiring to less than 50 m (164 ft.).
• Use seperate conduits or cable tray separation for 120 Vac control wiring, DC signal and
other I/O wiring, main circuit power lines.
• Use noise suppression on relay coils.
• Ensure adequate system and drive grounding.