Rockwell Automation 1771-QB Linear Pos. - Manual (Page 89)

Formatting Module Data (WRITES)
Chapter 7
7Ć10
If you program both software travel limits to zero, the module defaults to a
negative software travel limit of 0 and a maximum positive software travel limit
that is 180.0 inches or 4572 mm for one recirculation. If you select binary
format, the software travel limits are represented as 2’s-complement integers.
ATTENTION: To guard against equipment damage, we recommend
that you set software travel limits to match your axis length.
Figure 7.8
Software Travel Limit Words
50061
Positive software travel limit,
BCD or binary
± 799.9 inches or ± 7999 mm max
Sign:
0 = +
1 = -
15 14 13 12 11 10 09 08 07 06 05 04 03 02 01 00
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Negative software travel limit,
BCD or binary
± 799.9 inches or ± 7999 mm max
Sign:
0 = +
1 = -
15 14 13 12 11 10 09 08 07 06 05
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03 02 01 00 04
ZeroĆPosition and Software Travel Limit Examples
The zero position offset and software travel limits can be difficult to understand
so the following examples have been provided. Note that the examples show
zero position and software travel limits relative to the movement of the magnet
along the transducer. The actual movement of a workpiece depends on how the
transducer is mounted in a given system.