PTZ (continued)A DATA BIT is one part of a set of data sent to the camera to tell it which way to point.
Some PTZ cameras like very short packets of information, others require longer packets
of information at a time.
We can set this by choosing the number of DATA BITS to form a packet. This value must
be matched to the required value for your camera system. Simply enter the camera
systems preferred value into the drop-down menu.
Data Bit
Stop Bit
Parity
Each packet of data sent needs either one or two stop bits attached to the end, to
tell the camera system when a packet ends and a new one begins.
This should be matched to the requirements of the PTZ camera system. Choose 1
or 2 as required for your PTZ camera system.
A parity check is a control bit (a 1 or a 0) sent after each packet of data to verify that
no mistakes have been made in sending that packet of data. The mode must (again)
match the type and model of PTZ camera being used.
Bit Settings
There are several ‘bit’ settings to configure - again, these must match the required settings for the camera system. Consult
the camera documentation to learn these values.
Cruise mode will instruct the connected PTZ camera to “cruise” between set view-
ing angles. Thus, the camera will continually and autonomously move between
viewing positions which you can program (see next page). You’ll be able to define
the points the camera “cruises” between, and how long it will spend on each
one.
Cruise Mode
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Address
As there is only one RS485 port, and multiple PTZ systems can be connected
to the DVR if required, each one needs its own address. Again, this value is
matched to the camera that the user wants to be controlled on that channel.
So, usually, the camera operating on channel 2 would have its PTZ address
entered in the space for channel 2.
Regarding Pelco-P Protocol:
If you choose to control your PTZ system using the Pelco-P protocol, then you’ll
need to adjust the command address setting in the DVR. As most PTZ protocols
number their command addresses from 1 upwards, Pelco-P has a “0” address.
Thus, a command address of “0” on your PTZ system will be controlled by the
DVR with a command address of “1”. Essentially, when using Pelco-P, set the
command address in the DVR to be one higher than the PTZ system’s.