Dahua ITC237-PU1B-IR Web Operation Manual page 26

Please refer to the following sheet for detailed information.
Parameter
Work mode
Manual
ANPR
Snap Amount
Snap
Direction
4.1.2.2 RS485/IO
The intelligence default interface is shown as in Figure 3-4.
Step 1. Check Start Coil IO.
Step 2. Select coil 1 trigger mode.
 No trigger: not trigger snapshot.
 Rise edge: trigger snapshot when vehicle exits coil.
 Drop edge: trigger snapshot when vehicle enters coil.
Step 3. Select scheme.
 Single_in1-snap_nospeed
 Double_in1-snapt_speed
Figure 4-4 Snapshot
Note
Coil：force to coil snapshot

 Video：force to video snapshot
 Mix mode：force to combine coil and video snapshot.
Snapshot 1～2 pic
 Observer: snapshot incoming vehicle
Reverse：snapshot outgoing vehicle

Double：snapshot both incoming and outgoing vehicle

Table 4-2
Figure 4-5 RS485/IO
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