Mitsubishi Electric FR-D720-0.2K-G Instruction Manual page 266

Operation panel
E.OS
indication
Name
Overspeed occurrence
Description Trips the drive unit if the motor speed exceeds Pr. 374 Overspeed detection level.
Check point Check that Pr. 374 Overspeed detection level is appropriate.
Corrective
Set Pr. 374 Overspeed detection level appropriately.
action
Operation panel
E.PID
indication
Name
PID signal fault
If any of upper limit (FUP), lower limit (FDN), and deviation limit (Y48) turns ON during PID control, drive unit shuts off
the output. This function is active under the following parameter settings: Pr. 554 PID signal operation selection  "0,10",
Description
Pr. 131 PID upper limit  "9999", Pr. 132 PID lower limit  "9999", and Pr. 553 PID deviation limit  "9999". This protective
function is not active in the initial setting (Pr. 554 = "0", Pr. 131 = "9999", Pr. 132 = "9999", Pr. 553 = "9999").
 Check if the measured PID value is greater than the upper limit (Pr. 131) or smaller than the lower limit (Pr. 132).
Check point
 Check if the absolute PID deviation value is greater than the limit value (Pr. 553).
Corrective
Make correct settings for Pr. 131 PID upper limit, Pr. 132 PID lower limit, Pr. 553 PID deviation limit. (Refer to page 216.)
action
Operation panel
E.SAF
indication
Name
E.SAF
 Appears when internal circuits are malfunctioning.
Description
 Appears when one of the lines between S1 and SC, or between S2 and SC is opened.
Check point Check if the shorting wire across the terminals S1 and SC or the terminals S2 and SC is disconnected.
Corrective action
Short across the terminals S1 and SC and the terminals S2 and SC with shortening wires.
NOTE
 If faults other than the above appear, contact your sales representative.
Causes and corrective actions
FR-PU07 E.OS
FR-PU07 PID Signal Error
Fault
FR-PU07
E.SAF
5
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