Recently i was working with Freelance 2013 with controller PM902F ( Redundant).Here Profibus master as CI930F with slave as CI840 with 5 nodes . The problem which i facing is while commissioning its able to make communication healthy with all 5 nodes with single controller ( PM902F) .Also node redundancy between each node also working fine. while trying to make both primary & secondary controller in to line . all the 5 nodes in hardware configuration ( commissioning mode ) showing SLAVES NOT EXIST SHOWING. Also i had enabled the redundancy link in both controllers & connected an cross cable between ETH2 port of both controller can someone tell me what maybe the reason for communication failure. Hope for the best answer.
How did you connect the redundant pair of PM 802F to the Profibus line. Do you use Profibus line redundancy? Where did you terminate the Profibus line(s)? Do you use switches on the Profibus plugs for termination? A little drawing would help.
Dear First you may use a straight through Cable between the controllers(Primary and Secondary Controller). if you are using PM902F with CI930F please make sure that Master should have the Termination Resistance as ON and on all the last node the Termination resistance should be ON. also define that are you using GSD\DTM Version of IO Configuration.
Project Backup and Network Drawing will help to get more in the issue.