I am trying to use SAP PCo Modbus connection to Simatic S7 1200 and write to a single tag. I defined my tag in SAP PCo in Input register (300001.00) and tags in TIA portal are defined as I10.0. When I try to run test query for TagStore I got this message: [Tag]: Exception [TargetInvocationException] - Exception has been thrown by the target of an invocation.
Tag reading works fine.
I also tried the same way using Kepware and in this scenario, I am able to write tags normally.
Anybody who had the same issue?
PS: Reason using only Modbus is simply for testing.