Topics created by Mohamed Dounnani

Hi @mohamed-dounnani,
the addressing is as follows:

/dev/extcomm/0/... <- All serial ports (0 = RS485 1.1, 1 = RS485 2.1)
/dev/extcomm/1/... <- Serial ports of Group 1 (0 = RS485 1.1)
/dev/extcomm/2/... <- Serial ports of Group 2 (0 = RS485 2.1)

You can reveal the structure by listing the directory:

unipi@L503-sn101:~ $ ls -l /dev/extcomm/* /dev/extcomm/0: total 0 lrwxrwxrwx 1 root root 12 Aug 31 09:51 0 -> ../../ttyNS0 lrwxrwxrwx 1 root root 12 Aug 31 09:51 1 -> ../../ttyNS1 /dev/extcomm/1: total 0 lrwxrwxrwx 1 root root 12 Aug 31 09:51 0 -> ../../ttyNS0 /dev/extcomm/2: total 0 lrwxrwxrwx 1 root root 12 Aug 31 09:51 0 -> ../../ttyNS1

Martin

@mohamed-dounnani,
your calculations are in order. With the tests we did above, I am afraid you received a PLC with wrong calibration data. The calibration is a way how to ensure that when you set a desired voltage through Modbus registers, it will in fact set the correct voltage on the terminal connectors. The calibration process is one of many throughout the assembly of the unit. The calibration is done on our testbenches and it means you have to send the unit back to us. We sincerely do apologize for this.

Please send me (kudlacek@unipi.technology) your number of order for this PLC and I will get back to you with further information.

Thank you very much,
Martin