ATI Series D12 Toxic Gas Transmitter with H10 Smart Sensor
Revision N (7/15) 68
Communications
The D12 Transmitter supports ASCII, HART 5, and Modbus communications. ASCII is the default
protocol if the HART or Modbus option is not ordered.
Communication Setup
Communication Setup page variables are used to configure the
protocol and settings of the physical communication interface. The
protocol selection is performed at the factory, and may not be
changed. Settings for the physical communication interface may be
changed for ASCII and Modbus protocols, however, they are
restricted for the HART protocol).
Figure 71. Communication setup page
Table 18. Communication setup variables
Protocol
The Protocol variable identifies the installed protocol driver:
• None
• ASCII (default)
• Modbus (option)
• HART (option)
Interface
The Interface variable selects the physical communication interface that the
transmitter will control during transmit and receive functions:
• RS232 (available for ASCII or Modbus, not for HART)
• RS485 (available for ASCII or Modbus, not for HART)
• MODEM (available for HART only)
The transmitter must be wired in accordance with this selection (see External
Connections).
Baud_Rate
The Baud_Rate variable is used to configure the baud rate of the transmitter’s
UART, and may be set to: 300,600,1200,2400,4800,9600,14.4k, or 28.8k
The value is fixed at 1200 for HART protocol, and defaults to 9600 for Modbus
and ASCII.
Parametrs
The Parametrs variable is used to configure parity, the number of data bits, and
number of stop bits of the transmitter’s UART:
• N,8,1 …no parity, 8 data bits, 1 stop bits
• N,8,2 …no parity, 8 data bits, 2 stop bits
• E,8,1 …even parity, 8 data bits, 1 stop bit
• O,8,1 …odd parity, 8 data bits, 1 stop bit
The value is fixed at O,8,1 for HART protocol, and defaults to N,8,1 for Modbus
and ASCII.
►Protocol=ASCII
Interface=RS232
Baud_Rate=9600
Parametrs=N,8,1
Menu>Setup>System>Commun
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