AVG Series User Manual | 45
EXTERNAL CONTROL
RS232 Connection and Port Configuration
Connect your control system or PC to the RS232 input of the display via a 9-pin, straight through connector
cable. 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 115200, to match that of the display RS232 port.
TCP/IP Control Configuration
Connect your network, control system, or PC to the display's Ethernet In or Ethernet Out port via a CAT5
cable. The display must be connected to the network and must have a valid IP address. Configure your
control system to run through Telnet (Port 23).
Command and Response Format
Any commands sent from an automation/control system or PC to an Avocor display must have the following
format (ASCII is not accepted/used) :
[STX] [IDT] [TYPE] [CMD] [VALUE]/[REPLY] [ETX]
• [STX] indicates the start of the command data (always 07).
• [IDT] is the display ID (always 01).
• [TYPE] is the command type:
• 00 = return to host (response from the LCD panel)
• 01 = read / action
• 02 = write
• [VALUE] is the parameter setting for the command.
• [REPLY] is the parameter setting for the command, acknowledged by the display in its response to a
command.
• [ETX] indicates the end of the command data (always 08).
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