1
OVERVIEW
1.1 Features
1.1.3 Features of Process CPU
1 - 16
1
Overview
2
Performance
Specification
3
Sequence Program
Configuration and
Execution Conditions
4
I/O Nunber Assignment
5
Memories and Files
Handled by CPU Module
6
Functions
7
Communication using
built-in Ethernet ports of
CPU module
8
Communication with
Intelligent Function
Module
1.1.3 Features of Process CPU
The features specific to the Process CPU are described below.
(1) Additional 52 process control functions
Fifty-two instructions supporting high-leveled process controls have been added to
the CPU based on the High Performance model QCPU.
Refer to the following manual for details of the added instructions.
QnPHCPU/QnPRHCPU Programming Manual (Process Control Instructions)
(2) Two-degree-of-freedom PID control system
The Two-degree-of-freedom PID control system has been adopted to enable optimum
responses to both set value changes and disturbance.
(3) Auto tuning function (PID constant initial value setting)
The auto tuning function enables automatic control parameter tuning, decreases the
tuning time and labor of operators and control engineers, and eliminates differences
between individuals in tuning results.
Refer to the following manual for details of the auto tuning function.
QnPHCPU/QnPRHCPU Programming Manual (Process Control Instructions)
Figure 1.4 Operations of Process CPU
Ethernet
GX Developer
PX Developer
Process CPU Process CPU
Tank Flow
rate
sensor
Solenoid
valve
Tank
Flow rate
sensor
Valve
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