Mitsubishi Electric FR-E700 Instruction Manual page 463

Parameter
Parameter details
When ratio (Pr. 128 = 42, 43) is selected for addition method, PID control × (ratio of main speed) is add-
ed to the main speed. The ratio is determined by the Pr. 125 "Terminal 2 frequency setting gain fre-
quency" and C2 (Pr. 902) "Terminal 2 frequency setting bias frequency". The frequency setting signal
is set to 0 to 50 Hz in the range between 0 to 100% in the initial setting. The ratio is (× 100%) when the
main speed is 50 Hz and (× 50%) when 25 Hz.
Fig. 6-160: 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 0 Hz, the frequency setting signal is 0% when C2 (Pr. 902) is
less than the set frequency.
Turning X14 signal on/off during operation by assigning X14 signal results in the following operation.
When X14 signal is on:
When X14 signal is off:
Pr. 128
40
41
42
43
Tab. 6-117: PID control in dependence of parameter 128
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 relationship of con-
trolled variable (%) of PID control and frequency, 0% is equivalent to the set frequency 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.
NOTE Pr. 127 "PID control automatic switchover frequency" is invalid.
FR-E700 SC EC/ENE
50 Hz
Bias
C2
(Pr. 902)
0
Uses output frequency unchanged as the main speed command and con-
tinues operation by dancer control.
Ends dancer control and continues operation at the set frequency made
valid.
Addition
PID Action
Method
Reverse action
Fixed
Forward action
Reverse action
Ratio
Forward action
Initial value
Frequency setting signals 100%
Set Point Measured Value
Pr. 133 Terminal 4
Special operation
Gain Pr. 125
Main Speed Command
Speed command for each
operation mode
I001894E
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