Checking addresses of the Video Turnstile units
A Logging Video Turnstile module collects and saves counts from up to 16 non-logging modules. To enable the software to distinguish between modules they each must have a unique address between 0 and 15. If you have purchased a rack of units, they should be appropriately addressed. If, on the other hand, you have bought loose items then all non-logging units will be set to address 16. This is so that you can add them to any existing system without a conflict of addresses. In this case though, you need to use the VT Setup software to give them a proper address in the range 0–15.
Note also that all logging modules (LVTs) default to address 0 following a reset, whilst non-logging modules (VTs) default to address 16. A reset occurs, for example, if you have left the Logger off for several days and its battery has gone flat.
The procedure when when adding units to the system is to add one at a time and change the Logger and VT address to the next values (0 up) before trying to add another unit.
Use the VT Setup software to change addresses.
- If you haven't yet done so, in the VT Setup software connect to a site (Select the Unit Select tab, choose your site and click the Connect to site button.)
- Go to the Logger Setup tab. The address of the first Logging module at this site is shown. Look at the drop-down list and make sure each Logger has a unique address from 0-29. If some have the same address then select one of the duplicates and click the Change button.
- You can now check and change the addresses of the non-logging VT modules attached to this Logger. Select the VT setup tab (shown below).
- The VT Setup program tries to contact VT units with addresses in the range 0-16. Those that respond are shown in the Select VT Unit list. To change one of these addresses select it from the list and click the Change Address button. (To check you have the correct VT module, click the "Flash Up/Down on this VT" button. The module's count lights will flash.)
When choosing an address, the physical position of the VT module doesn't matter. Each non-logging module has one camera attached, which monitors a doorway or part of a wider entrance. By identifying a module you are also identifying its attached camera and therefore the doorway being watched.
With wide entrances several cameras are mounted in a row. Make sure the VT modules connected to these cameras have consecutive addresses.
A non-logging module may have the same address as the Logger.
VT address 16 is special. The logger will only accept counts from VT addresses 0-15 (16 possible modules with 32 channels, in and out on each unit). VT address 16 is therefore not counted by the Logger. This means that a new unit or chip when plugged into a system cannot modify the existing data from what might be an existing VT module in the system. However, you do need to change the address of any VT module at address 16.
Next: Installing the CCTV camera.