Mitsubishi Q Series User Manual

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MELSEC-Q
3 SPECIFICATIONS
3.2.13 Cascade control function
(1) Cascade control function
The cascade control can perform the control with the channel 1 as master and
the channel 2 as slave.
The master performs PID operations by inputting the measured value (PV1) of
targets that are controlled at the last, converts the manipulated value (MV1) to
cascade signals by bias and gain, and corrects the set value (SV2) of the slave.
The slave performs the PID control according to the set value (SV2) corrected
into the cascade signals.
Master
(CH1)
PID operation
PID operation
Slave
(CH2)
Gain
Bias
Cascade
signals
Cascade
ON
Cascade
OFF
PV1
SV1
-
+
PV2
SV2
-
+
+
MV1
MV2
The cascade control is suitable for when there is a large time delay between the
heater and the part where needs temperature stabilized.
Example) Resin temperature control of a nozzle part of an extrusion machine
PID operation
PID operation
Gain
Bias
PV1
SV1
-
+
PV2
SV2
+
MV1
MV2
Q62HLC
Heater
Thermocouple
Thermocouple
Nozzle Part
Extrusion
machine
-
+
Cylinder part

Mitsubishi Q Series Specifications

General

Brand	Mitsubishi
Model	Q Series
Category	Control Unit
Language	English