Vb how to read the dtu data-CodePudding

Bosses, I do my graduation design to use GPRS dtu PLC remote transmission of data to the computer, then using vb to read and displayed, and now I didn't even know how to how to read, please answer

CodePudding user response:

Find dtu document, see interface communication protocol, or look have the SDK

CodePudding user response:

The

reference 1/f, crispy big ice cream reply:

find dtu document, see the interface communication protocol, or look have the SDK

Bosses, first set the dtu good PC's IP address and port, and then using winsock control for monitoring in vb, the moment when a machine connection requests to connect, so I can't

CodePudding user response:

Confirm the dtu and lower machine connection? Determine the hypogyny machine a connection request? Lower machine link request dtu received? Transmitted to the PC?

Don't just stare at PC program, the whole link any link not the final result is what you say "no."

CodePudding user response:

Alone the first ask you confirm dtu and lower level computer connection?
Contains
1, dtu, and the machine are on effective DianXinKa?
2, dtu and lower machine are in a position that the signal coverage
3, the two didn't owe the card
4, the two CARDS are opening the data plan?
.

CodePudding user response:

Dtu and PLC in the literature is, via rs485 connection, PLC can not be directly sends the data to the dtu,,

CodePudding user response:

references 4 floor crispy ice cream response:

is the first ask you to confirm dtu and lower level computer connection?
Contains
1, dtu, and the machine are on effective DianXinKa?
2, dtu and lower machine are in a position that the signal coverage
3, the two didn't owe the card
4, the two CARDS are opening the data plan?
.

Dtu and PLC in the literature is, via rs485 connection, PLC can not be directly sends the data to the dtu,,

CodePudding user response:

refer to 6th floor Fantomo response:

Quote: refer to 4th floor crispy big ice cream reply:
is the first ask you to confirm dtu and lower level computer connection?
Contains
1, dtu, and the machine are on effective DianXinKa?
2, dtu and lower machine are in a position that the signal coverage
3, the two didn't owe the card
4, the two CARDS are opening the data plan?
.

Dtu and PLC in the literature is, via rs485 connection, PLC can not be directly sends the data to the dtu,,

Ah, before that, you just said GPRS DTU, who know that you are using 485 even?

CodePudding user response:

refer to 7th floor crispy big ice cream reply:

Quote: refer to the sixth floor Fantomo response:

Quote: refer to 4th floor crispy big ice cream reply:
is the first ask you to confirm dtu and lower level computer connection?
Contains
1, dtu, and the machine are on effective DianXinKa?
2, dtu and lower machine are in a position that the signal coverage
3, the two didn't owe the card
4, the two CARDS are opening the data plan?
.

Dtu and PLC in the literature is, via rs485 connection, PLC can not be directly sends the data to the dtu,,

Ah, before that, you just said GPRS DTU, who know that you are using 485 even?

,,, I'm sorry, that I had said that kind of method can be implemented