Siemens SIMATIC S5 Manual page 20

Jobs can be sent to the IP247 via the PG interface and via the PC interface simultaneously.
When requested, the IP247 sends status messages via both interfaces.
Fig, 2/2 Communication with the PC and PG
Each positioning operation of the IP247 is based on a machine data record specific to the axis,
which must be transferred to the memory of the I P247 via one of the two interfaces. An axis is
only functional when a correct machine data record exists on the module. By making entries in
this data record, you stipulate the electrical and mechanical limits of your plant. These include
the maximum rate of frequency increase of the axis, the maximum pulse frequency, the per-
mitted traversing range of your axis and the type of axis (linear or rotary).
With the I P247, positioning jobs can be issued in two ways, as follows:
machining programs, i.e. a connected series of traversing jobs, dwell times, corrections
and switchovers, which are stored in the memory of the IP247,
single jobs, sent to the IP247 via an interface.
You can input and delete a machining program both via the PG and the PC interface.
It is possible to take into account changing tool lengths and to execute zero point offsets.
A Brief Introduction to the IP247
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