Communication protocols
PROGRAMMING MANUAL 174
Revision 3.0
After you have executed the command DEVICENET(unit_number,
2, ...), data arrays are automatically exchanged. The data
exchanged between the TJ1-DRT and the DeviceNet master is in
16-bit integer format. Each word exchanged ranges from -32768 to
32767.
A VR variable can hold a 24-bit number, and it can also hold
fragments. The exchange with the DeviceNet master does not
support values outside the range -32768 to 32767 or fragments.
Note
The maximum number of VR variables to exchange data
is 32.
Note.
If you use an OMRON DeviceNet master, it is advised to
select either input_count or output_count with a value of
4,8,16, or 32 for the VR variables.
I52E-EN-03.book Seite 174 Freitag, 29. Juni 2007 11:55 11
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