"您好，PID指令（例如：PID_Compact）建议通过修改Mode来实现自动和手动，具体用法可参考如下文档：
http://www.ad.siemens.com.cn/productportal/Prods/S7-1200_PLC_EASY_PLUS/10-Technology/02-PID/02-PID_Compact/03-PID_V2/01-instruction.htm
http://www.ad.siemens.com.cn/productportal/Prods/S7-1200_PLC_EASY_PLUS/10-Technology/02-PID/02-PID_Compact/03-PID_V2/02-Config.htm"