Christie FHQ841-T, Руководство пользователя

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FHQ841-T LCD Panels User Manual 39
020-000735-01 Rev. 1 (06-2014)
External control
In addition to using the display keypad or remote control unit, you can control the display using a
serial (RS232) link or Ethernet connection to send commands and receive responses to those
commands.
Serial Communications
The display uses a simple text-based control protocol to take requests from control devices and to
provide responses to such devices. This section describes how to send control messages over a
serial link between the display and an automation/control system or a PC running a terminal
emulation program.
RS232 Connection and Port Configuration
Connect your control system or PC to the RS232 input of the display; refer to Connecting a Control
System or PC on page 20. Configure the RS232 controller or PC serial port as follows: no parity, 8
data bits, 1 stop bit and no flow control. Set the baud rate to 19200bps, to match that of the
display RS232 port.
Command and Response Format
Commands sent from an automation/control system or PC to the display must have the following
format:
Direct Command Format (from computer)
• Format : [HEAD][SET ID][COMMAND][END]
• Example (Power on) : [K:][ALL][PON][.]
• [HEAD] indicates the start of the command data (always K:).
• [SET ID] is the display ID (always ALL).
• [COMMAND] is the command data (3Bytes).
• [END] indicates the end of the command data (always .).
Value Adjust Format (from computer)
• Format : [HEAD][SET ID][COMMAND][VALUE][END]
• Example (Volume level 50%) : [K:][ALL][PON][050[.]
• [HEAD] indicates the start of the command data (always K:).
• [SET ID] is the display ID (always ALL).
• [COMMAND] is the command data (3Bytes).
• [VALUE] is the parameter setting for the command (000~100).