FEC AFC3000, Hardware Operation Manual

Page: 204 / 294

Chapter 7 Fastening Instructions
PAGE 7-37
7-3-6 Current Value Warnings
After the end of the fastening operation, it is judged whether or not the peak current value during the
operation is within the high and low current limit. If the peak current value during operation falls below
the current low limit or exceeds the current high limit, ( even though the controller outputs the ACCEPT
judgment), the output signal “Multi: Current Value Abnormal Warning,” “Axis: Current Value Abnormal
Warning,” “Axis: Current Value Low Limit Warning,” or “Axis: Current Value High Limit Warning” is turned
“ON.”
The current value warning judgment cannot be disabled.
The full scale current is set automatically in accordance with the model of the
controller.
Do not change this value because it is set based on the tool/motor used.
Additionally, the fastening current limit limits the maximum value of the current output during
the fastening operation. If a value lower than the full scale current is set, the fastening operation
will be limited to this value and may not be able to perform the fastening without an abnormal
condition. The current limit is used to protect the motor during the execution of torque recovery,
which is an operation after fastening. When the current limit is exceeded, the fastening is stopped
and the abnormal state signal A05-01 “Servo Response Error” is generated.
520: Full Scale Current
523: Current Limit
522: High Current Limit
521: Low Current Limit
Caution