用PID指令写了段程序，执行后总出错，不知什么原因Network 1
LDN SM0.1
JMP 0
Network 2 // 定时中断时间100MS
LD SM0.0
MOVB 100, SMB34 //PID中断子程序的装载时间
ATCH INT1, 10 //设置一个中断，调用PID执行
ENI
Network 3
LD SM0.1
MOVW +0, VW1680
NOT
PID VB1600, 0
Network 4
LBL 0
Network 5
LD SM0.0
-R 0.0, LD2
/R 1000.0, LD2
Network 6
LDR< 1.0, LD2
MOVR 1.0, LD2
Network 7
LDR> 0.0, LD2
MOVR 0.0, LD2
Network 8
LD SM0.0
MOVR LD2, VD1604
Network 9 // 温度显示PV值输入LW0
LD SM0.0
ITD LW0, LD7
-D +0, LD7
DTR LD7, LD11
/R 1000.0, LD11
Network 10
LDR< 1.0, LD11
MOVR 1.0, LD11
Network 11
LDR> 0.0, LD11
MOVR 0.0, LD11
Network 12
LDN SM0.0
MOVR LD11, VD1600
Network 13
LD SM0.0
ITD SMW22, LD7
+D LD7, VD1682
Network 14
LDD>= VD1682, +20000
O SM0.1
MOVD +0, VD1682
Network 15 // VD1770为PID输出值，为什么要乘以2000.0?
LD SM0.0
MOVR VD1770, LD11
*R 20000.0, LD11
ROUND LD11, VD1686
Network 16 // PID数字输出
LDD< VD1686, VD1682
= L6.0
Network 17
LDN SM0.0
BMB VB1600, VB1600, 120
Network 18