When the setting parameters are uncertain,it is generally not appropriate to set the initial test parameters too sensitively,for example,the proportionality should not be set too small to prevent the system from oscillating.The general practice is that in manual control,the valve needs to be opened larger,and the P value(proportional degree)can be selected to be smaller;the valve does not need to be opened larger,and the P value(proportional degree)can be escaped larger.
在整定参数无把握的情况下，一般都不宜把初始试验参数放得太灵敏，例如比例度不宜放得太小，以免系统出现振荡。一般作法是在手动控制时，阀门需要开得较大者，P值(比例度)可选得小一些；阀门不需要开得较大者，P值(比例度)可逃得大一些。
ALLEN BRADLEY 700-N600A1 AC TIME RELAY IN BOX
MITSUBISHI QY42P OUTPUT MODULE GOOD TAKEOUT
MITSUBISHI QX42 INPUT MODULE GOOD TAKEOUT
PARKER MPM664BSG6G1N SERVO MOTOR GOOD TAKEOUT
ALLEN BRADLEY 2711P-RSACDIN POWER SUPPLY IN BOX
KEARNY TRECKER 1-21221 MEMORY BOARD GOOD TAKEOUT
ALLEN BRADLEY 1772-LE PROCESSOR CONTROL MODULE (REFURBI
ALLEN BRADLEY 1772-LG PROCESSOR CONTROL MODULE (GOOD TA
