G120的AI通道有个小功能,就是断线后,可以继续以原设定值运行。
S120无法直接实现这个功能,需要用自由功能块,自已搭一个。
不过,话说回来,线都断了,还要继续转,是不安全呢还是不安全?断线了都要继续转,那当初用个固定给值不得了。
以下参数抄来的,仅供参考了。
P20000[0]=8 ,active FREE FUNCTION BLOCK
P20228=R4052 , input of LIM
P20229=40, upper value
P20230=0.1, lower value
P20234=0, run-time group 0
P810=r20233(output of LIM, QL), change CDS
P2253.0=r4050, technology setpoint
p2253.1=r2262,
p1070.0=r4050, main setpoint
p1070.1=r2262
p2257=0.1s, ramp-up time of technology RFG
p2258=650s, ramp-down time of technology RFG
This is a non-standard application. It is so sorry that siemens cannot take any risk caused by using free function block on it.
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