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VG4 Modular Camera System Alternative Control Protocols | en 37
Bosch Security Systems, Inc. User’s Manual F.01U.133.268 | 6.0 | 2010.03
4.2 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.
4.2.1 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
4.2.2 Pelco Keyboard Commands
Pelco control commands are composed of a sequence of two (2) keyboard inputs with the
following convention: 1) a Command Number and 2) a Function key input.
The AutoDome uses the PRESET command key to save and recall presets (pre-positions) 1
through 99.
NOTICE! The AutoDome supports only the RS-485 protocol while in Pelco mode. It does not
transmit responses back to the controller.
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.
1CPU Module
2 Switch Location
3LEDs
4 RS485
NOTICE! To save a preset, enter the desired number and hold the PRESET key for
approximately two (2) seconds. To recall a preset, enter the desired preset number (or
command) and momentarily press and release the PRESET key.