ＤＡＴＡ：+$(R(1),16)+

DA TA :+&~(W(1),8)+

PLC程序

问题1：通信序列明明是00，而PLC程序中控制字2怎么是#1呢？

问题2：PLC程序中MOV &5 D250 这是用来做什么呀？

问题3：上面的发送和接收数中为什么只有帧头，data,帧毛，而没有数据长度，和接收地址呢？

问题4：+$(R(1),16)+，+&~(W(1),8)+怎么和PLC程序对应上来？

问题5：这个S0003 0200E怎么跟D260联系起来？R0001 0000 0199 0200E怎么跟D250联

上位机= > PLC

1.Bit command word

2.Setpoint word to pump 0 ~ 1000 = (0% ~ 100.0%)

Example setpoint string; [xx] is ASCII Code Value

S0003 0200E S[53] = start command for setpoints

Bin Bcd

Bit command word

0003[30303033]

0 bit : 1 = Switch pump ON

1 bit : 1 = Switch cycle ON

2 bit : 0 = no reset

~

13 bit : system 1 sec clock to the communication confirm

Pressure value command word

0200[30323030]

0200 = 20.0 %

E[45] = end command

PLC = > 上位机

a.Current pump status(Bit) word

b.Set pressure word 0 ~ 1000 = (0% ~ 100.0%)

c.Current pressure word 0 ~ 1000 = (0% ~ 100.0%)

d.Current HP status word 0 ~ 65535

Example readback string; [xx] is ASCII Code Value

R0001 0000 0199 0200E

Bin Bcd Bcd Bcd

R[52] = start command for readbacks

Bit status word

0001[30303031]

↑

0 bit : 1 = Pump is ON

1 bit : 0 = Cycle is OFF

2 bit : 0 = no reset

3 bit : 1 = HP rinse pressure OK to Belt drive run

0 = HP rinse pressure NG

~

R2000

↑

13 bit : system clock 2 second to communication check

Set pressure value

0199[30313939]

0199 = Current pressure 19.9% If not same with set, error

Current pressure value

0200[30323030]

0200 = Current pressure 20.0%

R0001000001990200E

Error code

00= No error in HP system

E[45] = end command

Proposed COM settings;

Baudrate 9600

Parity non

Start 1

Databits 8

Stopbits 1

Communication period is 0.3 second