Special operation
Parameter
6 - 260
Parameter details
When ratio (Pr. 128 = 42, 43) is selected for addition method, PID control × (ratio of main speed)
is added to the main speed. The ratio is determined by the Pr. 125 "Terminal 2 frequency setting
gain frequency" and C2 (Pr. 902) "Terminal 2 frequency setting bias frequency". The frequency
setting signal is set to 0 to 50Hz in the range between 0 to 100% in the initial setting. The ratio
is (× 100%) when the main speed is 50Hz and (× 50%) when 25Hz.
Turning X14 signal on/off during operation by assigning X14 signal results in the following op-
eration.
When X14 signal is on:
Uses output frequency unchanged as the main speed command and
continues operation by dancer control.
When X14 signal is off: Ends dancer control and continues operation at the set frequency
made valid.
Action of Pr. 129 "PID proportional band", Pr. 130 "PID integral time", Pr. 131 "PID upper limit",
Pr. 132 "PID lower limit", Pr. 134 "PID differential time is the same as PID control. For the re-
lationship of controlled variable (%) of PID control and frequency, 0% is equivalent to the set fre-
quency of Pr. 902 and 100% to Pr. 903.
For the Pr. 133 "PID action set point" setting, set frequency of Pr. 902 is equivalent to 0% and
Pr. 903 to 100%. When 9999 is set in Pr. 133, 50% is the set point.
I001894E
Fig. 6-134:
Signal calibration at terminal 2
NOTES
Even when C4 (Pr. 903) is set to other than 100%, the frequency setting signal is considered
as 100%.
Even when C3 (Pr. 903) is set to other than 0%, the frequency setting signal is considered
as 0%.
When C2 (Pr .902) is set to other than 0Hz, the frequency setting signal is 0% when C2
(Pr. 902) is less than the set frequency.
Pr. 128
PID Action
Addition
Method
Set Point
Measured Value
Main Speed Command
40
Reverse action
Fixed
Pr. 133
Terminal 4
Speed command for each
operation mode
41
Forward action
42
Reverse action
Ratio
43
Forward action
Tab. 6-92:
PID control in dependence of parameter 128
NOTE
Pr. 127 "PID control automatic switchover frequency" is invalid.
Frequency setting signals
Output frequency [Hz]
0
100%
Initial value
Bias
50Hz
C2
(Pr. 902)
Gain Pr. 125
Summary of Contents for FR-D720S SC EC
Page 2: ......
Page 4: ......
Page 24: ...Description of the case Product checking and part identification 1 4 ...
Page 108: ...Operation panel Operation 4 20 ...
Page 436: ...Setting for the parameter unit and operation panel Parameter 6 286 ...
Page 484: ...Measurements on the main circuit Maintenance and inspection 8 14 ...
Page 504: ...Specification change Appendix A 20 ...
Page 505: ......
Page 506: ......
Page 510: ...Index Appendix A 24 ...
Page 511: ......