User`s manual
3.4
Using RS485 Multi-Drop
RS485 MULTI-DROP, ADDRESS SET
This command is invalid when multi-drop mode is on (see below). Assign an
address to a camera with this command and then execute a SAV command (page
3.15). The cameras address will default to zero when its power is turned off if
you do not issue a save command after changing a cameras address. The
address is used to send a camera commands when in RS485 multi-drop mode.
Type In: Response Explanation
ADR x CR-LF Where x must be a unique address for each camera
connected to your RS485 network. An address must
be an integer between 0 and 99. Cameras are shipped
from the factory with their address set to 0.
ADR? Queries a camera for its address setting.
ADR x Means the camera address is set to x.
RS485 MULTI-DROP SELECT
Use this command to turn the multi-drop mode on or off. This command should be
used when you are connected to only one camera, at the same time you assign a
camera its address, for example. This command is not valid if you are using an
RS232 communications link. When multi-drop mode is on, all cameras connected
to the RS485 communications link listen for commands, however only the camera
addressed by the last LOG command will respond to commands.
Type In: Response Explanation
MDD OF CR-LF Turns multi-drop mode off.
MDD ON CR-LF Turns multi-drop mode on.
MDD? Queries the multi-drop mode setting.
MDD x Multi-Drop is set to x
LOG CAMERA RS485 MULTI-DROP
The log command instructs a specific camera to respond to subsequent com-
mands. The camera addressed with the LOG command is the only camera that
will respond to serial commands until you use the LOG command to address
another camera. This command is invalid when multi-drop mode is off.
Type In: Response Explanation
LOG x CR-LF Where x is the address of the camera that you want
to respond to all subsequent commands. The ad-
dress range is from 0 to 99.
Use the ADR? command to get the address of the
currently logged camera.