Protective and Diagnostic Functions
7-
23
* Displayed after autotuning has been completed. For constants in which no error is detected, the settings are reset to the values determined by autotuning.
Errors when Using the Digital Operator Copy Function
The errors that can occur when using the copy function from the Digital Operator are given in the following
table. An error code will be displayed on the Digital Operator. If a Digital Operator key is pressed when an
error code is being displayed, the display will be cleared and 03-01 will be displayed. The error contact output
and alarm output will not function.
Saturation
Motor core satura-
tion error (detected
only for rotational
autotuning)
*
The results of autotuning has exceeded
the setting range for a user constant so a
temporary setting was made for the
motor core saturation coefficient.
• Check the input data.
• Check motor wiring.
• If the motor is connected to the
machine, disconnect it.
Rated FLA Alm
Rated current setting
alarm
*
The rated current is set high.
Check the input data (particularly the
motor output current and motor rated
current).
Adjusted Slip
Value
Adjusted slip value
fell below lower limit
As a result of stationary autotuning 1,
the slip value has fallen to 0.2 Hz or
below.
Check the input data.
If rotational autotuning is possible, per-
form it. If impossible, perform stationary
autotuning 2.
Table 7.6 Errors during Copy Function
Func-
tion
Display
Meaning
Probable causes
Corrective Actions
Read
PRE
READ
IMPOSSIBLE
Digital Operator
write-protected
o3-01 was set to 1 to write a constant
when the Digital Operator was write-
protected (o3-02 = 0).
Set o3-02 to 1 to enable writing con-
stants with the Digital Operator.
IFE
READ DATA
ERROR
Illegal read data
The read data length does not agree.
Repeat the read.
Check the Digital Operator cable.
Replace the Digital Operator.
The write data is incorrect.
RDE
DATA ERROR
Illegal write status
An attempted write of a constant to
EEPROM on the Digital Writer failed.
A low Inverter voltage has been
detected.
Repeat the read.
Replace the Digital Operator.
Table 7.5 Errors During Autotuning (Continued)
Display
Meaning
Probable causes
Corrective Actions