Read CJ1M Data Memory and display in VB

How to read all or few Data Memory from PLC and display in VB


I am new in PLC to VB programming and i have a basic in ladder diagram and VB. I have build a ladder diagram that set a value #1 to DM0 if any input(for example : 0.01) in on and value #0 if the input is off. I have a few input(for example : 0.01, 0.02, 0.03) that also did the same process that is MOV the #1 value to DM0(for input 0.01) , DM1(for input 0.02) and DM3(for input 0.03) when the inputs is on and MOV #0 value when the inputs is OFF. Now, i am asking how to read the DM0, DM1 and DM3 in PLC to display in VB. As i know, we can read only 1 DM in 1 command. The example comman in VB to read DM from PLC that i create is

RD = "@00RD0" & "000" & "0001" 'RD Command format
Q = 0
For I = 1 To Len(RD)
Q = Asc(Mid$(RD, I, 1)) Xor Q
Next I
AxMSComm1.Output = RR & Hex$(Q) & "*" & Chr(13)

What is the command to read all three DM above and display in 1 textbox, or 3 textbox seperate. Sorry my english language is bad. Hope anyone can help me coz i have find the solution long time ago. thanks:wish:

anyone can help me?

RD = "@00RD0" & "000" & "0001" 'RD Command format

Click to expand...

Change the last value in "" to "0003" will read 3x consecutive words.

Creating the text box's should be quite simple, getting the data into them is a bit more work.
Your example looks differentto what I would do.
I am mobile at moment, so don't have access to any examples.

If you go to MrPlc.com, there is an ActiveX in the Omron downloads section that has examples & will do everything that you want.