1.常开→NO
2.常闭→NC
3.按钮开关→SB
4.交流接触器→KM
5.中间继电器→KA
6.热过载继电器→FR
7.电机→M
8.点动→JOG
9.正转→FWD
10.反转→REV
11.正极→VCC
12.负极→GND
13.启动→ST
14.停止→STP
15.复位→RST
16.运行→RUN
17.闭合→ON
18.断开→OFF
19.错误→ERR
20.清除→CLR
21.输入→IN
22.输出→OUT
23.串口→COM
24.总线→BUS
