S7-1500 Redundant Modbus TCP With Honeywell C300 (PCDI)

Hi,

I have modbus TCP redundant issue between S7-1500 and Honeywell C300 (PCDI Protocol).

On Siemens side, I use CPU 1511-1 PN for the primary connection & Communication Module CM 1543-1 for modbus secondary connection to DCS.

And as for DCS side I use PCDI C300 controller (Not SCADA Type).

The issue is when active link fail, modbus Standby link is take over.

But, when standby link fail. Both connection primary & secondary are failed for 5 seconds before it's automatically recover. 

Any suggestion?

Please support.

Thank You

Hi Kaulquappe,

Thank you for your response.

I will discuss with siemens programmer about your suggestion.

Once we know the error code, I will share with you.