- 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?
- Is the cable between PLC and PC/IPC
connected correctly?
- Are the used variables correctly defined in
the PLC?
- Has the file DEFAULT.BUR be
transferred?
- If you use hysteresis the option "Eventmode"
has to be activated.
- Two identical systems are accessed, with one
driver being used per connection. (see: special case of identical
PLC hardware and software)
- Have you analyzed the "driver communication
error file" (which errors have occured)?
- 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.
The file can be opened with any text editor, e.g. Notepad.
For additional error analyses, please send a
project backup and the "error file" to the support team responsible
for you.
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