- 12 -
11-3. Input scaling
You can set key sequence
‘
1-13. Control input scale lower limit setting
’
and
‘
1-14. Control input scale higher limit setting.
’
Setting below the lower limit value makes output 0% and setting above the higher limit value makes output 100%.
Control input (%)
100
0
Ou
tp
ut (
%
)
20
0.0 - 20.0%
Example: Input/output characteristics
according to scale lower limit setting
Input scale lower limit range
Control input (%)
100
0
Ou
tp
ut (
%
)
80
80.0 - 100%
Input scale higher limit range
97
3
Ramp
higher limit
value
Ramp
lower limit
value
Ramp
higher limit
value
Ramp
lower limit
value
Example: Input/output characteristics
according to scale higher limit setting
11-4. Variation limit (slow-up / slow-down time)
The variation limit function delays PAC18A output response according to control input signal or sudden change of setting.
Function for suppressing excessive variation of load voltage, load current or suppressing load of electrical equipment.
Slow-up / slow-down time is the time required for output to go from 0% to 100%. You can set from 0.0 to 99.9 seconds by
key sequence
‘
1-9. Slow-up
’
and
‘
1-10. Slow-down.
’
The longer the time is set, the slower output response is. Adjust time according to characteristics of load used.
The factory setting is approximately 1 second, but the overcurrent protection function could be triggered according to load conditions.
Output is changed by variation limit during ramp adjustment by external adjuster or by setting change of
key sequence
‘
1-6. Ramp lower limit setting
’
and
‘
1-8. Ramp higher limit setting.
’
Operation diagram
Control input
25%
0%
0%
100%
100%
75%
100%
Output
Approx.
3 seconds*
Slow-up
Slow-down
Input power
Power on
Variation limit slow-up setting range: 0.0
–
99.9 seconds
Variation limit slow-down setting range: 0.0
–
99.9 seconds
*The variation limit function produces an approximately 3 seconds delay when power is turned on.
