MODBUS TCP/IP connection issue for more IDs

[DŠ_10781107]

Hi All,

I'm facing an issue with KEPSERVER EX and MODBUS TCP/IP.

I have one Channel for MODBUS communication and in it 8 devices (each has 16 tags). Each of it commucating with same IP but with different ID to read data from different channels.

When I have only 5 devices, all works fine. When I add more, I'm not able to read devices from ID5 to 8 (warning - device is not responding), but the first 4 still works fine.

I've tried to separate devices to other channel, tried to raise the Scan rate to 20 seconds for each tag. but nothing helped.

I've tried to read the IDs from vendors app, which is communication also over modbus and it works fine for all devices in same time.

do you have any suggestions/ideas what to do?

Many thanks

[DŠ_10781107]

Solved. Switched channel socket utilization to "One Socket Per Channel (shared)".

[MRohilla · Accepted solution]

Greetings,

The target gateway ran out of allowed socket connections, switching to using only one solved the issue

Regards,

Mohit