Serial Communication Transmission Error; Memobus/Modbus Communication Error - YASKAWA V1000 Series Installation & Start-Up Manual

A data error occurred due to
noise.
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
CE
Cause
A data error occurred due to
noise.
YASKAWA ELECTRIC TOEP C710606 09B YASKAWA AC Drive V1000 Installation & Start-Up Manual
• Check 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.
• Use surge absorbers on magnetic contactors or other equipment
causing the disturbance.
• 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.

Serial Communication Transmission Error

Communication has not yet been established.
Possible Solutions
• 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 403.

MEMOBUS/Modbus Communication Error

Control data was not received correctly for two seconds.
Possible Solutions
• Check options available to minimize the effects of noise.
• Counteract noise in the control circuit wiring, main circuit lines
and ground wiring.
• Reduce noise on the controller side.
• Use surge absorbers on magnetic contactors or other equipment
causing the disturbance.
• 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.
• Separate all wiring for communications devices from drive
input power lines. Install a noise filter to the input side of the
drive input power.
5.5 Alarm Detection
Minor Fault Name
Minor Fault Name
YES
Minor Fault (H2-
= 10)
YES
5
YES
YES
YES
Minor Fault (H2-
= 10)
YES
207