Mitsubishi Electric 800 Series Instruction Manual page 348

 Selection of set point/measured value input method (Pr.609, Pr.610)
• Select the set point input method by Pr.609 PID set point/deviation input selection and the measured value input
method by Pr.610 PID measured value input selection. Switch the power voltage/current specifications of terminals 2
and 4 by Pr.73 Analog input selection or Pr.267 Terminal 4 input selection to match the specification of the input
device.
• When Pr.133 PID action set point ≠ "9999", Pr.133 is the set point. When the set point is set at Pr.133, the setting
frequency of C2 is equivalent to 0% and the setting frequency of Pr.125 is equivalent to 100%.
Pr.609, Pr.610 settings
2
3
4
5
*1 When the same input method has been selected for the set point and measured value at Pr.609 and Pr.610, set point input is invalid. (Inverter
runs at set point 0%)
*2 CC-Link, CC-Link IE TSN, CC-Link IE Field Network Basic, and BACnet/IP is available. For the details of each communication, refer to the FR-
A8NC Instruction Manual or the Instruction Manual (Communication).
NOTE
• After changing the Pr.73 or Pr.267 settings, check the voltage/current input selection switch. Incorrect setting may cause a
fault, failure or malfunction. (Refer to
• When terminals 2 and 4 are selected for deviation input, perform bias calibration using C3 and C6 to prevent a minus voltage
from being entered as the deviation input signal. Input of a minus voltage might damage devices and the inverter.
• The following shows the relationship between the input values of the analog input terminals, and the set point and
measured value.
Input
Input terminal
specification
0 to 5 V
Terminal 2 0 to 10 V
0 to 20 mA
0 to 5 V
Terminal 4 0 to 10 V
0 to 20 mA
*3 Can be changed by Pr.73 and Pr.267 and the voltage/current input switch. (Refer to
 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 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%.
Input method
*1
Terminal 2
*1
Terminal 4
*2
Communication
PLC function
page 266 for the setting.)
Relationship with analog input
*3
Set point
0 V = 0%
5 V = 100%
0 V = 0%
10 V = 100%
0 mA = 0%
20 mA = 100%
0 to 1 V = 0%
5 V = 100%
0 to 2 V = 0%
10 V = 100%
0 to 4 mA = 0%
20 mA = 100%
Output frequency
60Hz
Bias
C2
0
Frequency setting signal
Result
0 V = 0%
5 V = 100%
0 V = 0%
Pr.125, C2 to C4
10 V = 100%
0 mA = 0%
20 mA = 100%
0 to 1 V = 0%
5 V = 100%
0 to 2 V = 0%
Pr.126, C5 to C7
10 V = 100%
0 to 4 mA = 0%
20 mA = 100%
page 266.)
Initial value
100%
Calibration parameter
Gain
Pr.125
14. (A) Application Parameters
14.6 Dancer control
11
12
13
14
15
16
17
18
19
20
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