Ethernet 5.2
Communications 5-175
bits that may be useful to some users:
• If bit 1 (value 0x0002) is set, the control loop
is 2 ms, otherwise the control loop is 1 ms.
• If bit 0 (value 0x0001) is set, a sensor DI/O is
present, otherwise there is no sensor DI/O.
Spline Download Area:
These registers are write only. Reading them will return zero. This area is used to download
intervals and points in a spline. This is a much more efficient alternative to using individual New
Spline Point and Set Spline Interval/End Segment commands. For details on using this Spline
Download Area, see Downloading Splines to the RMC.
Plot Registers:
These registers can only be read; writes are ignored.
Note: Reading plots is not a trivial task; for further details, see Reading Plots from the
Communication Module.
Each plot data block has 1024 elements.
DB208-213 Plot data for axis 0
DB226-231 Plot data for axis 3
DB244-249 Plot data for axis 6
5.2.6.9 SoftPLC's SoftPLC
5.2.6.9.1 Using the SoftPLC with the RMC Ethernet Module
SoftPLC is a PC-based control solution that tightly emulates the PLC-5. Therefore, one who
knows how to use the RMC from a PLC-5 should easily be able to get the SoftPLC to
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