Mitsubishi Electric 800 Series, Инструкция по эксплуатации, Страница: 513 / 727

(A) Application parameters
512
PARAMETERS
 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 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 Pr.903 is set to other than 100%, the frequency setting signal is treated as 100%.
• Even if Pr.902 is set to other than 0%, the frequency setting signal is treated as 0%.
• If Pr.902 is set to other than 0 Hz, the frequency setting signal is 0% at the Pr.902 frequency setting or below.
 Setting the upper and lower limits of the PID manipulated amount
(Pr.1134, Pr.1135)
• Set the upper and lower limits of the PID manipulated amount.
• The upper limit of the manipulated amount is the frequency obtained by adding the value resulting from frequency
conversion of Pr.1134 to the main speed.
The lower limit of the manipulated amount is the frequency obtained by subtracting the value resulting from frequency
conversion of
Pr.1135 from the main speed.
 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
Pr.178 to Pr.189
setting
Description
X14
PID control valid
terminal
14
When this signal is assigned to the input terminal, PID control is enabled when
this signal is ON.
X64
PID forward/reverse
action switchover
64
PID control is switched between forward and reverse action without changing
parameters by turning ON this signal.
X72
PID P control
switchover
72 Integral and differential values can be reset by turning ON this signal.
0
Frequency setting signal
100%
Initial value
Bias
Pr.125
Gain
Pr.902
60Hz
Output frequency
Main speed
Upper limit of PID manipulated amount
Lower limit of PID manipulated amount
Output frequency considering upper/lower limit
of PID manipulated amount
Output frequency
Time