PRM21 Profibus Master problem communication

Question

I have a technical problem with CJ1W-PRM21 Profibus DP Master module. I have failed to establish communication between CX-Configurator and the Profibus unite which installed with CJ2M CPU 33.

• This is the first time to configure this module as it is a new one
• My module P.N is : CJ1W-PRM21 V3, it is not included in CX-Configurator master library, so I selected the latest version available CJ1W-PRM21 V2.
• I set all of the CX- Server settings needed (PLC Type (CJ2M) & CPU 33 & Network type: USB, but when I tried to test communication with test button, this error message displayed "171 <1 > CJ1W-PRM21 PROFIBUS DP-V1 Master CX-Server could not be initialised" and communication failed.
• Rotary switch of PRM21 adjusted to 1 position as Unite number in PLC I/O table is one.
• I am using USB connection and tested it with the CPU and it is OK and working properly with CX-Programmer, but it doesn’t work with CX-Configurator.
• PRM21 status LEDS are :

Run >>>> lite
PRM >>>> lite
BST >>>> flashing
BF >>>> flashing

All others are off. I rebooted my laptop many times , but problem still remains. Could you help me resolve this problem?

Answer 1

A simple reboot won't solve this problem. If the connection is established through USB, then I recommend checking the drivers and the configuration ports. Most of these problems are related to communication ports and drivers. Go to Device Manager (Start > Run > devmgmt.msc) and locate the drivers used for communication. Anything yellow in the Device Manager indicates there is a problem with a device. Right click it and select Update Driver, then follow the indications.

Secondly, start your apps and access the configuration options, then manually switch between the ports - until one responds correctly.

After this procedure, locate the setup package for CJ1W-PRM21 PROFIBUS DP-V1 Master CX-Server and reinstall it. Make sure that all other applications are closed during this time.