AutoDome Modular Camera System
Pelco® Protocol Mode | en
25
Bosch Security Systems, Inc.
VG4-200, VG4-300, VG4-500i Series User’s Manual
F01U073308 | 3.0 | 2007.09
4
Pelco® Protocol Mode
The Pelco Mode features Auto Baud Detection that automatically detects and adjusts the
AutoDome protocol and baud rate to match that of the controller. The AutoDome responds to
Pelco-D or Pelco-P protocol commands.
4.1
Hardware Configuration
The AutoDome is configured from the factory for RS-485 operation in
Pelco Protocol Mode
.
1.
Connect the controller's TX terminals to the AutoDome's TxD terminals. See the
AutoDome Modular Camera System Installation Manual for complete wiring instructions.
2.
Pan or tilt the keyboard joystick to confirm that control has been established to the
AutoDome (approximately five (5) seconds).
Figure 4.1
RS-232/RS-485 Selection Switch
4.2
Address Guidelines
–
An AutoDome with an address set to 0 responds to commands set to any address.
–
Pelco-P
protocol must use addresses 1 to 32.
–
Pelco-D
protocol must use addresses 1 to 254.
i
NOTICE!
The AutoDome supports only the RS-485 protocol while in Pelco mode. It does not
transmit responses back to the controller.
i
NOTICE!
If control is not established, ensure that the RS-232/RS-485 selector switch is
positioned to RS-485 (outward toward the LED lights). This switch is located on the bottom of
the AutoDome CPU board, under the camera head and next to the LED lights. See
Figure 4.1
.
SWITCH
LOCATION
CPU MODULE BOARD
RS485
LEDs
Switch Location
RS485
LEDs
CPU Module Board
i
NOTICE!
A previously configured AutoDome with an address above 32 (Pelco-P upper limit) or
254 (Pelco-D upper limit) can be used without readdressing the unit. However, no two (2)
addresses can be the same. For example:
Pelco-P addresses above 32 are repeated in multiples of 32 (1, 33, 65, 97 are the same).
Pelco-D addresses above 254 are repeated in multiples of 254 (1, 255, 509, 763 are the
same).
