<9. Advanced Engineering >
NPAS_PID_2 accepts the SINT (Settled INiTialize) from NPAS_PID_1, and performs
PID calculation using the MV value of NPAS_PID_1 as its SV value.
This example involves two NPAS_PIDs in cascade connection but the importance of
status information propagation and read back input apply similarly in other forms of
NPAS POU connection.
TIP
The following information is extracted from the NPAS_POU online help documentation.
Indicates the cascade connection is open.
This status occurs when a downstream POU has entered a non-CAS
mode or the route of the cascade conection is disconnected by a switch,
Upon receiving this status, the upstream POU performs output tracking.
It is sent to the downstream POU as a respone to MINT.
The downstream POU waits after sending MINT until it receives the
corresponding SINT.
To Next Page
Loading...
Need help?
General
