E2Prom Write Selection (Pr. 342); Pid Control (Pr. 128 To Pr. 134) - Mitsubishi Electric FR-V500 Instruction Manual

2
3.14.2 E PROM write selection (Pr. 342)
2
You can select either E PROM or RAM to which parameters to be written during computer link communication
operation (RS-485 communication by PU connector) and operation with a communication option. When changing
the parameter values frequently, write them to the RAM (Pr. 342 = 1).
Parameter Name
2
342
E PROM write selection
REMARKS
When the parameter setting is " not written to E
2
the E PROM) at power on reset or terminal reset.
Pr. 342 Setting
0
(factory setting)
1

3.15 PID control (Pr. 128 to Pr. 134)

3.15.1 PID control (Pr. 128 to Pr. 134
The inverter can be used to exercise process control, e.g. flow rate, air volume or pressure.
The voltage input signal (0 to ±10V) is used as a feedback value to constitute a feedback system for PID control.
Parameter
Name
Number
128 PID action selection
129 PID proportional band
130 PID integral time
131 Upper limit
132 Lower limit
PID action set point for
133
PU operation
134 PID differential time
<Setting>
(1) Basic PID control configuration
Pr.128 = 10, 11
Terminal 1
Set
point
Process
value
Pr.128 = 30, 31
Terminal 2
Set
point
Kp: Proportional constant
Factory Setting
0
2
PROM" (setting = 1), the settings return to the original values (values saved in
2
E PROM write
Powering off the inverter will not erase the changed parameter values.
RAM write
Powering off the inverter will erase the changed parameter values. Therefore, the parameter
values available when power is switched on again are the values stored in E
speed
Factory
Setting
10
100%
1s
9999
9999
0%
9999
Deviation
PID
x
1 + Td·S
Kp 1 +
operation Ti·S
Deviation
x PID
1 + Td·S
Kp 1 +
Ti·S
operation
+
-
Process value
Terminal 1
Ti: Integral time
139
PID control (Pr. 128 to Pr. 134)
Setting Value
2
0
Write into E PROM
1 Write into RAM
)
Setting Range
10, 11, 30, 31
0.1 to 1000%, 9999 9999: No proportional control
0.1 to 3600s, 9999 9999: No integral control
0 to 100%, 9999 9999: Function invalid
0 to 100%, 9999 9999: Function invalid
0 to 100%
0.01 to 10.00s, 9999 9999: No differential control
Inverter
Manipulated
variable
fi
Drive
circuit
Inverter
Manipulated
variable
fi
Drive
circuit
S: Operator Td: Differential time
2
PROM last time.
Remarks
Motor
IM
Motor
IM
3