现有3台电机 a b c
现在要求是：
设置一个连锁开关
当处于连锁状态时 按连锁启动/连锁停止按钮,可以自动启动停止
切换到解除连锁状态时，则可以单个的起停设备
另外就是，当有一些外部故障时，必须全部设备停下来，我的代码如下，不知道怎么老不按我的指令动作！麻烦大家帮我看一下！

A(
O "连锁启动"
O "启动反馈"
)
AN "连锁停止"
A "连锁"
O "报警停炉信号"
= "启动反馈"

A(
O "连锁停止"
O "停止反馈"
)
AN "连锁启动"
A "连锁"
= "停止反馈"


AN M 0.0
A(
A "连锁"
A "启动反馈"
O
AN "连锁"
A "引风启动M"
)
S "引风起停"
AN M 0.0
A(
A "连锁"
A "鼓风停止延时"
O
AN "连锁"
AN "引风启动M"
)
R "引风起停"
NOP 0



A "连锁"
A "引风运行"
L S5T#10S
SD "引风启动延时"
NOP 0
NOP 0
NOP 0
NOP 0



A "连锁"
AN "鼓风运行"
L S5T#10S
SD "鼓风停止延时"
NOP 0
NOP 0
NOP 0
NOP 0



AN M 0.0
A(
A "连锁"
A "引风启动延时"
O
AN "连锁"
A "鼓风启动M"
)
S "鼓风起停"
AN M 0.0
A(
A "连锁"
AN "炉排运行"
O
AN "连锁"
AN "鼓风启动M"
)
R "鼓风起停"
NOP 0




AN M 0.0
A(
A "连锁"
A "鼓风运行"
O
AN "连锁"
A "给煤启动M"
)
S "炉排起停"
AN M 0.0
A(
A "连锁"
A "停止反馈"
O
AN "连锁"
AN "给煤启动M"
)
R "炉排起停"
NOP 0