- Is the COM port in use by another
application or are the settings incorrect?
- Is the device (PLC) that you are trying to
communicate with connected to the power supply?
- Are you using a full-featured null modem
cable?
- Have you checked the LEDs at the adapter and
interpreted them according to the adapter documentation?
- Are the configured Net addresses available
at the MPI bus? Did you specify them in the configuration?
- Are the used datablocks defined correctly in
the PLC?
- Have you analyzed the error file (which
errors did occur)?
In case of communication problems, the driver
writes a detailed problem analysis into the driver communication
error file. This file is stored in the project directory
(RT\\FILES\\zenOn\\custom\\log). The name of the file is
_<drivername>.TXT
You can view this file with any text editor,
e.g. Notepad.
For additional error analyses please send a
project backup and the "error file" to the support.