For my internship I need to make a serial communication between a servodrive with a 3 row 15 pins male output. It has a RS422/485 based protocol. In previous years the servo drive was able to communicate with a rs485 converter.
The communication link was like this : PC->(Via USB)RS485 converter (9pins male connector)->Self soldered connection wire -> RS485 15pins connection point.
But unfortunatly the cable between the converter and the (15 pins) serial output is nowhere to be found! and the colleague who made this doesn't work here anymore.
I have tried to solder it many times now, but I can't manage to get it fixed.
The following pictures are from the user guide of the servodrive:
And where is the problem?
RS-485 neet three line
- A and B and GND
A aka - , DATA- or TX-
B aka +, DATA+ or TX
ang GND as common ground
So just connect the wires.
For proper function should be any at both ends of the line was between A and B, ie terminator. Resistance of 120 Ohm see Figure 2.1 in USB-
COM485-PLUS1.
Any about RS-485 https://en.wikipedia.org/wiki/RS-485
And where is the problem?
RS-485 neet three line
- A and B and GND
A aka - , DATA- or TX-
B aka +, DATA+ or TX
ang GND as common ground
So just connect the wires.
For proper function should be any at both ends of the line was between A and B, ie terminator. Resistance of 120 Ohm see Figure 2.1 in USB-
COM485-PLUS1.
Any about RS-485 https://en.wikipedia.org/wiki/RS-485