LNS QUICK SIX - Servo Amplifier;Plc Communication Fault

1-18 Chapter 1: Alarms
QUICK SIX
Servo Amplifier/PLC Communication Fault
BAR STOCK IS MOVING
FORWARD DURING
HEADSTOCK REVERSE
WITH COLLET OPEN !
POSSIBLE CAUSES :
-CUT-OFF TOOL BROKEN
OR NOT IN POSITION
-EXCESSIVE PUSHING
TORQUE
SERVO AMPLIFIER/PLC
COMMUNICATION FAULT!
-TURN OFF MAIN POWER
-WAIT FOR 2 SECONDS
-RESTORE MAIN POWER
IF PROBLEM PERSISTS
VERIFY CONNECTIONS
PLC TO AMPLIFIER
Description:
The Servo Amplifier/PLC Communication Fault alarm occurs when the PLC sends a message to the servo amplifier and the message
is not confirmed by the servo amplifier via a checksum or vice versa. This is generated if one of three conditions is not met:
1. The data sent did not match the data received.
2. After 10 seconds, no response from the Servo Amplifier.
3. On power up, the amplifier and PLC parameters do not match.
Solution:
• Verify that the CN3 connector is connected properly on the servo amplifier as well as on the PLC.
• Verify the 24VDC supply for the PLC. Any voltage fluctuation can result in poor performance of the PLC.
If the problem persists please contact LNS America, Inc. for further information.