Product Description
2
0
1
8
-0
6
15
2.2.5
Long Zone - Single Zone
This operating mode is designed specifically for the operation of a zone in a range of Standard
zones or Enhanced ZPA zones that is significantly longer than the surrounding zones. A longer
zone like this would negatively affect the throughput of the entire conveyor line because the
distance between the conveyed product is primarily determined by the zone length. This is why
conveyed product is not separated in this case, which might cause the distance between the
conveyed product to increase.
If there is a release signal, it is forwarded directly to the zones behind that zone and the DC
roller motor of the zone is switched on (block release). If there is no conveyed product in front of
the zone sensor, the zone will independently set the release signal to allow more conveyed
product to enter. If no conveyed product has been detected for a certain period of time, the
zone will shut down its DC roller motor. It will start its DC roller motor again if the status of the
upstream zone sensor changes and conveyed product is conveyed into the zone.
The following example describes the sequence in the operating mode "Long Zone":
Figure 2.10
■
Step A: Downstream zone (3) has set its release signal (green light). Zone (2) immediately
forwards it to its upstream zone (1) and conveys its conveyed product to the next zone (3).
■
Step B: Downstream zone (6) has reset its release signal (red light). Because no product
has arrived in front of the zone sensor in zone (5) yet, it will retain its release and move the
conveyed product to its final position. The subsequent conveyed product (4) can enter
freely.
■
Step C: The conveyed product has reached the zone sensor (8). Because the
downstream zone (9) is still not issuing a release signal, zone (7) stops the conveyed
product and resets its release signal to also stop the subsequent conveyed product.
The following time conditions are used in the operating mode "Long Zone" (see Chapter
"Operating Behavior"):
■
Leaving time
■
Switch-on delay
■
Idle mode delay
This operating mode always works in 1-zone operation, meaning that the DC roller motor of the
rear zone is synchronized with that of the front zone and the rear zone sensor has no function.
5
6
4
B
2
3
1
A
8
9
7
C
Roller motor
Zone sensor
Zone sensor
Roller motor
Zone sensor
Zone sensor
Roller motor
Zone sensor
Zone sensor
