Yaskawa Sigma II Series Servo System - Manual (Page 421)

Sigma II User’s Manual Chapter 9: Inspection, Maintenance, and Troubleshooting
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A.E7
A.E7: Option Unit Detection Error
A.E7 occurs the first time the SGDH amplifier is used after disconnecting an option
unit. This alarm cannot be cleared with an alarm reset; instead, clear it with function
Fn014.
Display and Outputs
Note: OFF: Output transistor is OFF (alarm state).
ON: Output transistor is ON.
Status and Remedy for Alarm
Alarm Outputs
Alarm Code Output
ALM Output
ALO1 ALO2 ALO3
ON ON OFF OFF
Cause of the Problem Solution
A
The SGDH amplifier is used
immediately after disconnection of
an option unit without clearing the
unit detector.
To use the SGDH amplifier after disconnecting
the option unit, execute Fn014 (option unit
detection result clear), in the auxiliary function
mode, and then cycle the power.
B Option unit connection is defective. Check and correct the connection.
C Option unit is defective. Replace the option unit.
D Servo amplifier Replace the servo amplifier.
When the control power is
turned ON after disconnecting When the control power
is turned ON with an option
an option unit unit connected.
B, C, D A