How will the two connected with dupont line? Then you can into the PLC on the development board is similar to a recognition of the

CodePudding user response:

You mean the DB9 plug to PLC, LH - 1000 is connected to the adapter 1-9, GND?
LH - 1000 is an adapter? I see again and 232/485, the other side of the IIC, TTL,

Is this
1, 1-9 GND and DB9 pins is a corresponding relationship, how do you confirm the corresponding, such as no. 1 corresponding to the first row of the first stitch;
2, you check the interface definition DB9 pins, each root respectively what
3, according to the corresponding relationship with dupont line respectively connect the LH - 1000 pins 1-9 GND

CodePudding user response:

Rx and tx received another development board

CodePudding user response:

Just to BBS, don't know how to play, this simple, 232 mouth not on your computer, so, the small plate of 232 received the db9 2 and 3 of the board, can be received at the end of 232 from the computer, no, on a usb turn to the 232 line, remember that line sequence may have a problem, can be tuned offline order, won't burn things, rest assured, try can make, do you want to make 485 can also, on a usb transfer 485 equipment, can also make, wiring see your usb transfer 485 interface definition