Just contact with PLC control, now want to use vb to do a simple interface control PLC, specific function as follows:
After the control motor and reversing, and reach the designated position (trigger limit switch), and then displayed on the interface "in place", PLC has become no problem, mainly in vb how to write

CodePudding user response:

Universal answer:
to supplier provide sample!
Do you pay for the hardware still don't service, silly!

CodePudding user response:

reference 1st floor Tiger_Zhao response:

universal answer:
to supplier provide sample!
Do you pay for the hardware still don't service, silly!

Is indeed the truth, the communication protocol, interface specification, hardware providers, there must be data
Here to ask you, we have no contact with these things, "outsider" is not immortal,
How can you know how those things it "dialogue" to each other!

CodePudding user response:

On the top floor!
You have to do at most is to research the mscomm

CodePudding user response:

Get agreement, we analysis together with you

CodePudding user response:

Ask hardware vendors to sample,

CodePudding user response:

reference 1st floor Tiger_Zhao response:

universal answer:
to supplier provide sample!
Do you pay for the hardware still don't service, silly!

+ 10000

CodePudding user response:

The standard MODBUS protocol is commonly used in communications, control of PLC input and output; Manufacturers have a communication protocol?