Im trying to communicate PAC3200 v2.2.1 with S7-1200(1214C DC/DC/Rly v2.2) on TIA v11 SP2, using switch and staticIP with same subnet.

Im using MODBus Client on OB1(picture attached) but its busy bit always and i cannot read data from PAC3200 Holding Register.

I used Wireshark to trace MODBus TCP when i was trying communicate between PAC3200 and S7-1200. There was no packet of MODBus TCP. I tried using example https://support.industry.siemens.com/cs/document/40614428/datenkommunikation-zwischen-s7-1200-und-sentron-pac3200-über-modbus-tcp-(set-22)?dti=0&lc=de-DE but there was no success. I also tried example https://support.industry.siemens.com/cs/document/58856464/switching-loads-with-s7-1200-and-sentron-pac3200-via-modbus-tcp-(set-24)?dti=0&lc=en-MY also no success.

I tried connecting PAC3200 directly to PC using WinCC v7.4 and I was successful and i also captured the packets.

Can anyone guide me, how to communicate between S7-1200 & PAC3200.

Thankyou