Mitsubishi Electric FR-E700 Instruction Manual page 427

Parameter
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.
Fig. 6-146: 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.
Turning X14 signal on/off during operation by assigning X14 signal results in the following op-
eration.
When X14 signal is on:
When X14 signal is off:
Pr. 128
40
41
42
43
Tab. 6-107: 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 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.
NOTE Pr. 127 "PID control automatic switchover frequency" is invalid.
FR-E700 EC
50Hz
Bias
C2
(Pr. 902)
0
Uses output frequency unchanged as the main speed command and
continues 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 Main Speed Command
Pr. 133 Terminal 4
Special operation
Gain Pr. 125
Speed command for each
operation mode
I001894E
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