daveConnection
A structure representing the physical connection to a single PLC.
daveConnection stores all properties that are unique to a single PLC:
The MPI address of this PLC.
The rack the PLC is in.
The slot the PLC is in.
The structure daveConnection is created and initialized by daveNewConnection:
daveConnection * dc;
dc =daveNewConnection(di, MPI, rack, slot);
The parameters are:
di: a daveInterface
MPI: the address of the PLC (only meaningful for MPI and PPI).
rack: The rack the CPU is mounted in (normally 0, only meaningful for ISO over TCP).
slot: The slot number the CPU is mounted in (normally 2, only meaningful for ISO over TCP)