Mitsubishi Electric FR-A800 Series Instruction Manual page 608

NOTE
• 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 set point, measured value
and deviation. (Calibration parameter initial values)
Input terminal
Terminal 2
Terminal 1
Terminal 4
*6 Can be changed by Pr.73 Analog input selection, Pr.267 Terminal 4 input selection and the voltage/current input switch. (Refer to
NOTE
• Always calibrate the input after changing the voltage/current input specification with Pr.73 and Pr.267, and the voltage/current
input selection switch.
 Input/output signals
• Assigning the PID control valid signal (X14) to the input terminal by Pr.178 to Pr.189 (Input terminal function selection)
enables PID control to be performed only when the X14 signal is turned ON. When the X14 signal is OFF, regular inverter
running is performed without PID action. (When the X14 signal is not assigned, PID control is enabled only by setting
Pr.128 ≠ "0".)
• Input signal
Signal
X14 PID control valid
X80 Second PID control valid 80
PID forward/reverse
X64
action switchover
Second PID forward/
X79 reverse action
switchover
X72 PID P control switchover 72
Second PID P control
X73
switchover
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Input
*6
specification
Set point
0 V = 0%
0 to 5 V
5 V = 100%
0 V = 0%
0 to 10 V
10 V = 100%
0 mA = 0%
0 to 20 mA
20 mA = 100%
-5 to 0 V = 0%
0 to ±5 V
+5 V = +100%
-10 to 0 V = 0%
0 to ±10 V
+10 V = +100%
0 to 1 V = 0%
0 to 5 V
5 V = 100%
0 to 2 V = 0%
0 to 10 V
10 V = 100%
0 to 4 mA = 0%
0 to 20 mA
20 mA = 100%
Pr.178 to
Function Pr.189
setting
14
64
79
73
search engine
Relationship with analog input
Result
0 V = 0% 0 V = 0%
5 V = 100% 5 V = 100%
0 V = 0% 0 V = 0%
10 V = 100% 10 V = 100%
0 mA = 0% 0 mA = 0%
20 mA = 100% 20 mA = 100%
-5 V = -100%
-5 to 0 V = 0%
0 V = 0%
+5 V = +100%
+5 V = +100%
-10 V = -100%
-10 to 0 V = 0%
0 V = 0%
+10 V = +100%
+10 V = +100%
0 V = -20%
0 to 1 V = 0%
1 V = 0%
5 V = 100%
5 V = 100%
0 V = -20%
0 to 2 V = 0%
2 V = 0%
10 V = 100%
10 V = 100%
0 mA = -20%
0 to 4 mA = 0%
4 mA = 0%
20 mA = 100%
20 mA = 100%
When this signal is assigned to the input terminal, PID control is enabled when this
signal is ON.
PID control is switched between forward and reverse action without changing
parameters by turning ON this signal.
Integral and differential values can be reset by turning ON this signal.
Calibration parameter
Deviation
Pr.125, C2 to C4
When Pr.128 = "10", Pr.125
setting, C2 to C4.
When Pr.128 ≥ "1000": C12
to C15.
Pr.126, C5 to C7
Description
5. PARAMETERS
5.14 (A) Application parameters
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page 496.)
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