Common Local Operator Interface (Loi) Tasks - Emerson Rosemount 470XA Manual

Using the Rosemount 470XA
June 2023
2. Enter the appropriate number for the current month.
3. Press
4. Move to the next text box.
5. Repeat
Enable or disable Daylight Savings Time
Daylight Savings Time is the practice of temporarily advancing clocks so that afternoons
have more daylight and mornings have less. Typically, clocks are adjusted forward one
hour near the start of spring and are adjusted backward in autumn. Since the use of
Daylight Savings Time is not universal, you have the option of enabling or disabling it with
the local operator interface (LOI).
To enable or disable Daylight Savings Time:
Procedure
1. Use the Down arrow key to select the Enable Day Light Savings check box.
2. Press
4.4

Common local operator interface (LOI) tasks

4.4.1 Configure the serial communications settings
To configure the serial port communication settings to communicate with Modbus
devices, such as a flow computer, RTU, SCADA, or DCS, the protocol settings for all the
devices on the network must match.
Prerequisites
Obtain the required serial port settings prior to configuring the settings on the gas
chromatograph (GC).
Procedure
1. Go to the Main Menu and then to Applications → Communications.
2. Enter the serial port settings.
84
.
Step 1 through Step 3
to toggle the check box.
The Communications screen displays.
Address that the host device will use to communicate with the GC. For
Modbus ID
applications where the GC is the only slave device on the network, the
Modbus ID is typically set to 1. For multi-dropped applications where
the GC is one of several on the serial network, the Modbus ID needs
to be unique. Refer to your host device configuration to determine the
Modbus ID to be configured on the GC.
Baud rate can be set at the standard rates from 1200 baud up to 57600.
Baud Rate
For Modbus communications, the typical setting is 9600.
Number of bits used for communications. The typical setting for
Data Bits
ASCII mode communications is 7. The typical setting for RTU mode
communications is 8.
Number of bits sent to indicate the end of a message. Typically set to 1.
Stop Bits
Error checking mode for the parity bit in ASCII mode messages. This
Parity
can be set to either ODD or EVEN for ASCII mode communications
for the other text boxes.
Manual
MS-00809-0100-0470
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