Fault Detection; Fault Detection; Fault Displays, Causes, And Possible Solutions - YASKAWA V1000 Quick Start Manual

5.2

Fault Detection

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Fault Displays, Causes, and Possible Solutions

Table 5.2 Detailed Fault Displays, Causes, and Possible Solutions
LED Operator Display
bUS
Cause
No signal received from the PLC.
The communication cable is faulty
or a short circuit exists.
A communications data error
occurred due to noise.
The option card is damaged.
The option card is not properly
connected to the drive.
Cause
Faulty communications wiring, or a
short circuit exists.
YASKAWA ELECTRIC TOEP C710606 47A YASKAWA AC Drive – V1000 Quick Start Guide
Option Communication Error
• After establishing initial communication, the connection was lost.
• Only detected when the run command frequency reference is assigned to an
option card.
• Check for faulty wiring.
• Correct the wiring.
• Check for loose wiring and short circuits. Repair as needed.
• Check the various options available to minimize the effects of noise.
• Counteract noise in control circuit, main circuit, and ground wiring.
• Ensure that other equipment such as switches or relays do not cause noise and
use surge suppressors if required.
• Use cables recommended by Yaskawa or another type of shielded line. Ground
the shield on the controller side or on the drive input power side.
• Separate all wiring for communications devices from drive input power lines.
Install an EMC noise filter to the input side of the drive input power.
• Replace the option card if there are no problems with the wiring and the error
continues to occur.
• The connector pins on the option card are not properly lined up with the
connector pins on the drive.
• Reinstall the option card.
MEMOBUS/Modbus Communication Error
CE
Control data was not received for the CE detection time set to H5-09.
• Check for faulty wiring.
• Correct the wiring.
• Check for loose wiring and short circuits. Repair as needed.

5.2 Fault Detection

Fault Name
Possible Solution
Possible Solution
5
131