YASKAWA V1000 Series Installation & Start-Up Manual page 225

Cause
A data error occurred due to noise.
Option card is damaged.
The option card is not properly
connected to the drive.
LED Operator Display
CALL
Cause
Communications wiring is faulty,
there is a short circuit, or something
is not connected properly.
Programming error on the master
side.
Communications circuitry is
damaged.
Terminal resistance setting is
incorrect.
LED Operator Display
YASKAWA TM.V1000.01 V1000 Drive Installation & Start-Up Manual (Preliminary 01-19-07)
• Check the various options available to minimize the
effects of noise.
• Take steps to counteract noise in the control circuit
wiring, main circuit lines and ground wiring.
• Try to reduce noise on the controller side.
• If the disturbance is caused by switching magnetic
contactors or other equipment, use surge absorbers on
these devices.
• Use cables recommended by Yaskawa, or another type of
shielded line. The shield should be grounded on the
controller side or on the drive input power side.
• All wiring for communications devices should be
separated from drive input power lines. Install a noise
filter to the input side of the drive input power.
If there are no problems with the wiring and the fault
continues to occur, replace the option card.
• The connector pins on the option card are not properly
lined up with the connector pins on the drive.
• Reinstall the option card.
Serial Communication Transmission Error
Communication has not yet been established.
• Check for wiring errors.
• Correct the wiring.
• Remove and ground shorts and reconnect loose wires.
Check communications at start-up and correct
programming errors.
• Perform a self-diagnostics check.
• Replace the drive if the fault continues to occurs.
The terminal slave drive must have the internal terminal
resistance switch set correctly. Place DIP switch S2 to the
ON position. Refer to MEMOBUS/Modbus Switch
Settings on page
MEMOBUS/Modbus Communication Error
CE
Control data was not received correctly for two seconds.
5.6 Alarm Detection
Possible Solutions
Minor Fault Name
Possible Solutions
90.
Minor Fault Name
Minor Fault
Output
(H2- = 10)
YES
YES
5
YES
Minor Fault
Output
(H2- = 10)
YES
YES
YES
YES
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