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C21 Timer Operation
C21 enables or disables a timer operation that is triggered by a run command and continues
for the timer count previously specified with the
㧛 keys. The operating procedure for
the timer operation is given below.
Data for C21 Function
0 Disable timer operation
1 Enable timer operation
• Pressing the key during timer countdown quits the timer operation.
• Even if C21 = 1, setting the timer to 0 no longer starts the timer operation with the
key.
• Applying terminal command FWD or REV instead of the key command can also
start the timer operation.
Operating procedure for timer operation (example)
Preparation
• Set E43 data to "13" (LED monitor) to display the timer count on the LED monitor and set
C21 to "1" (Enable timer operation).
• Specify the reference frequency to apply to timer operation. When the keypad is selected as
a frequency command source, press the
key to shift to the speed monitor and specify
the desired reference frequency.
Triggering the timer operation with the
key
(1) While watching the timer count displayed on the LED monitor, press the
㧛 key to
set the timer for the desired count in seconds. Note that the timer count on the LED
monitor appears as an integral number without a decimal point.
(2) Press the
key. The motor starts running and the timer starts counting down. If the timer
counts down, the motor stops without pressing the
key. (Even if the LED monitor
displays any item except the timer count, the timer operation is possible.)
After the countdown of the timer operation triggered by a terminal command such as
FWD, the inverter decelerates to stop and at that moment the LED monitor displays
GPF
and any LED monitor item (
for the timer count) alternately. Turning FW
OFF returns to the LED monitor item.
C31, C33
C36, C38
C41, C43
Analog Input Adjustment for [12] (Offset and Filter time constant)
Analog Input Adjustment for [C1] (C1 function) (Offset and Filter time constant)
Analog Input Adjustment for [C1] (V2 function) (Offset and Filter time constant)
C31, C36 or C41 configures an offset for an analog voltage/current input at terminal [12], [C1]
(C1 function) or [C1] (V2 function), respectively. The offset also applies to signals sent from
the external equipment.
C33, C38 or C43 configures a filter time constant for an analog voltage/current input at
terminal [12], [C1] (C1 function) or [C1] (V2 function), respectively. The larger the time
constant, the slower the response. Specify the proper filter time constant taking into account
the response speed of the machine (load). If the input voltage fluctuates due to line noises,
increase the time constant.
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