Electro Cam PL-1746 Series - Manual (Page 88)

4-43 PLS Functions
Software Version
Backplane
PL-1746 Function Name SLC 500 Mapping Read/ Valid Range for Data
File Index Write
Address Number Capability
Base Revision M0:S.4 136 R/O 0-32767
Major Revision M0:S.3 134 R/O 0-32767
Screen Menu Path
MAIN SCREEN to TEST MENU to SYSTEM INFO to SOFT-
WARE VERSION
MAJOR REV:1.75
BASE REV:1.17
There are no values that can be changed in this screen.
Description The Software Version screen displays the revision number of the firmware contained
within the controller. This information may be useful if the unit needs to be returned for
service.
Shift Window Overlaps Shift Position—Not Recommended! When the Shift Window overlaps the shift position as
shown here, two problems may occur.
One Product, Two Bits: Due to variations in conditions,
sensors sometimes generate more than one pulse for a
product. If the product sensor sends a pulse early in the
window, that pulse will shift when the encoder reaches
the shift position. If the sensor sends a second pulse for
the same product after the shift position, a second bit will
be set for the same product.
Inconsistent Timing: Some products may appear early
in the Shift Window, while others appear late. For early
products, a bit will be set, then immediately shifted at the
shift position. For late products, a bit will be set after the
shift position, and a full revolution will occur before the bit
shifts to 1.
In most applications, programming Shift Window to
overlap the Shift Position will cause problems.
Shift Window
On at 900
Off at 100
0
500
First Bit Set
Shift Position
Second Bit Set
Shift Window (Cont’d)