I had situation like on picture (sorry, i've lost screenshot from online connection), what is the reason that bit DB1.DBX0.3 was always in true, even though bit is reset in the same network. Variable DB1.DBX0.3 is used only in this network. Bit DB1.DBX0.3 is set by HMI, by pressing button (event Release).
Can somebody explain me, what could cause this strange behavior of plc program.
Program was corrected by throw away instruction P_TRIG
Hardware configuration is S7-1200 (V2.0) and touch panel KTP600 Basic mono.