用户参数–般在变量数列中设定。但是设定%M0006即可用逻辑中存储的常数重新初始化从%R0102(%Ref+2)开始的14个字。(一个有用的技巧)可以用%M1将PID块转换为手动模式，这种模式下可以调整手动命令字%R113的值。%M4或者%M5可以用于增加或减少%R113和PID以及积分器的值，每100毫秒增减1。对于快速的手动操作，%M2/%M3接通，则CPU在每个扫描周期内，用%R113内的值加/减%R2内的值，最后再将结果赋给%R113。PID OK时，%T1输出ON.
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