Standard System Configuration
3-15
Part 1056418-07
E 2019 Nordson Corporation
Straight Flagging
Straight flagging limits you to 8 part IDs. The highest input number
receiving a signal determines the part ID. The following examples illustrate
ways to use straight flagging:
Part ID by Part Height: Arrange the part ID sensors to detect parts (or
racks of parts) of different heights. When only sensor 1 detects a part,
preset 1 is loaded; when sensors 1 and 2 detect a part, preset 2 is loaded.
This method can result in mis-reads if the part shape causes the part ID
sensor signals to shut off at different times.
Part ID by Part Flag: Arrange the part ID sensors to detect closed slots in
a part flag. The highest numbered photoeye detecting a closed slot
determines the part ID number. Slot 5 is closed, so part ID 5 is detected
and preset 5 is loaded.
NOTE: If you are using straight flagging and you attempt to manually enter
a part ID above 8, the system will force the part ID to 8.
1
2
3
4
5
6
1
2
3
4
5
6
1
2
3
4
5
6
7
8
Part ID by Part Height
Part ID by Part Flag
Part 5
Detected
Figure 3-12 Straight Flagging Examples
Encoded Flagging
With encoded flagging, the system reads the 8 part ID inputs as 8-bit binary
words. Encoded flagging allows you to identify up to 255 different part IDs.
Part ID 0 (no photoeyes blocked) is not a valid part ID. It is ignored.
The following is an example of encoded flagging using a part flag. The
table lists the possible part IDs for inputs 1, 2, and 3.
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