8-17
Name Description
LED
monitor
displays
Alarm
output
[30A/B/C]
Option
communications
error detection
Upon detection of an error in the communication between the
inverter and an optional card, stops the inverter output.
GT
Yes
Option error
detection
When an option card has detected an error, this function stops
the inverter output.
GT
Yes
STOP
key
priority
Pressing the
key on the keypad forces the
inverter to decelerate and stop the motor even if the
inverter is running by any run commands given via the
terminals or communications (link operation). After the
motor stops, the inverter issues alarm
GT
.
GT
Yes
Operation
protection
Start
check
function
The inverter prohibits any run operations and displays
GT
on the 7-segment LED monitor if any run
command is present when:
- Powering up
- An alarm is released (the
key is turned ON or
an alarm reset RST is input.)
- "Enable communications link LE" has been
activated and the run command is active in the
linked source.
GT
Yes
Tuning error
detection
During tuning of motor parameters, if the tuning has failed or has
aborted, or an abnormal condition has been detected in the
tuning result, the inverter stops its output.
GT
Yes
RS-485
communications
error detection
When the inverter is connected to a communications network via
the RS-485 port designed for the keypad, detecting a
communications error stops the inverter output and displays an
error code
GT
.
GT
Yes
Data save error
during under-
voltage
If the data could not be saved during activation of the
undervoltage protection function, the inverter displays the alarm
code.
GTH
Yes
RS-485
communications
error detection
(optional)
When the inverter is connected to a communications network via
an optional RS-485 communications card, detecting a
communications error stops the inverter output and displays an
error code
GTR
.
GTR
Yes
Retry
When the inverter has stopped because of a trip, this function
allows the inverter to automatically reset itself and restart. (You
can specify the number of retries and the latency between stop
and reset.)
—
—
Surge
protection
Protects the inverter against surge voltages which might appear
between one of the power lines for the main circuit and the
ground.
— —
Command loss
detected
Upon detecting a loss of a frequency command (because of a
broken wire, etc.), this function issues an alarm and continues
the inverter operation at the preset reference frequency
(specified as a ratio to the frequency just before the detection).
— —
"—": Not applicable.
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