Ste39

 

z00m

Hi guys!

Just wanted to know, was this issue resolved? and how? I'm kinda experiencing the same problem with my system.

On segment 1 I have a CPU and 1 remote I/O module and on segment 2, a series of several remote I/O modules.. The DP1 LED is active (with steady light) while DP2 is inactive (no light). I've already checked the terminations on my remote modules, no misplaced connection whatsoever was found. I followed the terminations on the manual just as what has been pointed out in your above statements. What could possibly be the reason for this? What actions would you suggest to address the issue?

Thank you in advance for your insights

b/r

z00m

 Hello z00m,

please share one drawing of your line

Thank you for your help :)

Hello Zoom;

Your sketch shows 3 repeaters; I understand from the description that the faulty one is the last of the network, and that the 2 first are working as expected.

Is there anything different in the wiring/configuration of this third repeater, compared to the 2 others?

Hope this helps,

Daniel Chartier

Hello Zoom;

Please take a few seconds to provide this additional information:

1.- what state are the diagnostic LEDs n the CPU (Profibus master) and on each of the repeaters (identify them as R1, R2 and R3 on your drawing);

What do the LEDs indicate on the standard repeater?

https://support.industry.siemens.com/cs/fr/en/view/103709539

2 - Are the Profibus connection wires (Red and Green) systematically connected to all repeaters (and on the slaves):

- Green to A1/A2;

- Red to B1/B2;

3 - if there is a SF/BF LEd active in the CPU, what are the contents of the diagnostic buffer?

Also, you could try disconnecting R2 and R3 from the network, leaving only the CPU and R1, with its connected slaves.; see if you can activate R1 and read the slaves in the Profibus master.That would limit the possibilities of error in your setup, and simplify the diagnosis.

Hope this helps,

Daniel Charter