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10. Alarm function
The alarm function consists of power failure, overcurrent, hardware error, heater break and input error.
If an equipment error occurs, an alarm is output externally and is displayed on the front display (status display).
In addition to input error, you can select key sequence
‘
1-2
–
1-5
’
for each alarm.
When an error occurs and the key sequence
‘
0-0. Output monitor (basic screen)
’
is displayed, an alarm code is displayed on the front display (status
display), and if any other screen is displayed, the error dot on the front display (status display) flashes.
CAUTION
When an alarm occurs, turn off the power, remove the cause, and then turn the power back on.
Alarms
Alarm types
Alarm
display
Conditions
Alarm output
Corresponding action
(1) Power failure
(Power error)
“ ”
Power supply frequency is
outside the range of 40Hz - 70Hz,
or is unstable.
Available
Stops output.
Output is automatically reset if alarm conditions
are eliminated.
(2) Overcurrent
(Current error) (optional)
“ ”
Output current has exceeded
130% of rating.
Available
Stops output.
Turn off the power, remove the cause, and then
turn the power back on.
(3) Hardware error
(optional)
“ ”
Output current flows when output
is 0%.
Available
Stops output.
If a hardware error alarm occurs when a load is
connected, repair is required.
(4) Heater break
(optional)
“ ”
Heater deterioration or break has
been detected.
Available
(can be disabled
by Di function)
Control continues.
(5) Input error
“ ”
Control input has exceeded
the range of -10 to 110%.
Not available
*If multiple alarm causes occur at once, display is as follows:
The following alarm function contents are indicated:
10-1. Power failure (Power error)
A power failure alarm occurs when power supply frequency exceeds the 40
–
70 Hz range or power supply frequency is unstable.
Output stops when an alarm occurs. The front display (status display) displays
and the parameter display displays
.
When the source of the error has been eliminated, the
,
alarm display goes off and output is automatically restored.
When a power
failure is output to optional alarm contact output (AL), set key sequence
‘
1-2. Power failure alarm.
’
If the power is instantaneously interrupted, you can select whether or not to conduct output slow-up for a short period of time following restoration by
key sequence
‘
2-7. Power supply instantaneous stop handling function.
’
Malfunction could however result from instantaneous interruption even if
“
output slow-up
”
is set.
10-2. Overcurrent (Current error) (current detection / alarm output function [optional])
An overcurrent alarm occurs for the built-in current detection circuit when the output current value exceeds 130% of the rating.
Output stops when an alarm occurs. The front display (status display) displays
and the parameter display displays
.
When the source of the error has been eliminated, the
,
alarm display goes off and output is automatically restored.
When an overcurrent alarm is output to alarm contact output (AL), set key sequence
‘
1-3. Overcurrent alarm.
’
