MITSUBISHI ELECTRIC FR-S520 - Manual (Page 153)

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Operation Panel Indication Er2 FR-PU04
In PU/EXT Mode
OPERATOR ERR
Name Write-while-running error/mode designation error
Description
Write was performed during operation.
An attempt was made to change the Pr. 79 setting to the
operation mode where the operation command has been input.
Write was performed in the external operation mode.
Corrective action
After stopping operation, make parameter setting.
After setting the operation mode to the "PU operation mode",
make parameter setting. (Refer to page 98)
Operation Panel Indication Er3 FR-PU04 Incr I/P
Name Calibration error
Description Analog input bias and gain calibration values are too close.
Corrective action
Check the settings of C3, C4, C6 and C7 (calibration functions).
(Refer to page 74)