cable for modbus communication on M91

[nikita1]

Hi,

Can i MJ10-22-CS25 cable (programming cable) for modbus communication between

my PC to M91-2-T38?

thanks,

Nikita1

[Joe Tauser]

Yes. If you haven't already, look at Help->Sample U90 Projects->Examples->MODBUS for example programs to configure the COM port as a master or slave.

Joe T.

[nikita1]

thanks Joe,

i'm new on PLC's and i want to communicate with PC (the PC will be the master)

what kind of Modbus (ASCII/RTU) does M91-2-T38 use?

[Emil]

All our controllers use Modbus RTU on their serial ports. In addition, almost all Vision models (except V120) support Modbus IP, if optional Ethernet card was installed.

[nikita1]

Thanks Emil,

i'v loaded the Modbus slave demo program from the U90 ladder examples.

and try to read data with Modbus Poll application,

now i'm getting a time out message,

does somone have any idea whats wrong ,

attach is a screenshot from Modbus poll .

[Emil]

First of all - disable Flow control.

Check if the controller is set to ID1. The standard example is set ot ID2.

Please check again the communication cable.

I hope these tips will help.

[nikita1]

thanks alot!

it works!!!!