Mitsubishi Electric 800 Series Instruction Manual page 360

 Selection of additive method for PID calculation result
• When ratio is selected as the additive method (Pr.128 = "42, 43"), PID calculation result × (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 settings. In the initial status, 0 to 60 Hz is set for 0% to 100%. Thus, 60 Hz
main speed is regarded as 100%, and the 30 Hz main speed is regarded as 50%.
NOTE
• Even if C4 (Pr.903) is set to other than 100%, the frequency setting signal is treated as 100%.
• Even if C3 (Pr.902) is set to other than 0%, the frequency setting signal is treated as 0%.
• If C2 (Pr.902) is set to other than 0 Hz, the frequency setting signal is 0% at the C2 (Pr.902) frequency setting or below.
 Input/output signals
• The following signals can be used by assigning functions to Pr.178 to Pr.189 (Input terminal function selection) and
Pr.190 to Pr.196 (Output terminal function selection).
• Input signal
Signal Function
X14 PID control valid
PID forward/reverse
X64
action switchover
PID P control
X72
switchover
• Output signal
Signal Function
FUP PID upper limit
FDN Lower limit output
PID forward/reverse
RL
rotation output
During PID control
PID
activated
NOTE
• Changing the terminal functions with Pr.178 to Pr.189 and Pr.190 to Pr.196 may affect other functions. Set parameters after
confirming the function of each terminal.
 PID monitor function
• This function displays the PID control set point and measured value on the operation panel, and can output these from the
terminals FM and AM.
Output frequency
60Hz
Bias
C2(Pr.902)
0
Frequency setting signal
Pr.178 to Pr.189
setting
When this signal is assigned to the input terminal, PID control is enabled when this
14
signal is ON.
PID control is switched between forward and reverse action without changing
64
parameters by turning ON this signal.
Only proportional term is valid when this signal is turned ON. (Integral and
72
differential values are reset.)
Pr.190 to Pr.196
setting
Positive Negative
logic logic
15 115 Output when the measured value signal exceeds Pr.131 PID upper limit.
14 114 Output when the measured value signal falls below Pr.132 PID lower limit.
"Hi" is output when the output display of the operation panel is forward rotation (the
16 116 RUN LED is ON) and "Low" is output when the display is reverse rotation (the RUN
LED blinks) and stop (the RUN LED is OFF).
47 147 Turns ON during PID control.
Initial value
Gain
Pr.125
100%
Description
Description
14.(A) Application Parameters
14.6 Dancer control
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12
13
14
15
16
17
18
19
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