Astar HT-3300 Especificaciones descargar pdf (Pagina 195)

185

Reference Manual

00809-0100-4811, Rev DA

Appendix C: Rosemount 3300 Series with HART

to Modbus

Converter

January 2015

Rosemount 3300 Series with HART

to Modbus

Converter

The transmitter will continue to use a communication protocol once communication has been

established.

To configure the 3300 level transmitter using RCT and the MA (+), MB (-) terminals, do the

following:

1. Connect the RS-485 Converter to the MA (+), MB (-) terminals.

2. Connect the power wires (or cycle power) to the transmitter.

3. Wait 20 seconds.

4. In RCT, select Poll Address in the drop-down list (also see note below). Select the

button to the left of the drop-down list to start polling.

5. After connection to the transmitter, perform the necessary configuration.

6. When the configuration is completed, disconnect the RS-485 Converter, connect the

Modbus communication wires, and cycle power to the transmitter

7. Verify communication between the transmitter and the RTU is established (can take up

to 60 seconds from startup).

Note

If there are multiple 3300 Modbus units on the bus with HART address 1, it will not be possible

to establish communication (by default the transmitters have HART address 1). To establish

communication in this case, make sure the 3300 transmitter is alone on the bus. Disconnect or

turn off power from any other devices.

C.6.2 Connect to the HART terminals

To configure the Rosemount 3300 Series Transmitter, connect the communicator or PC to the

HART terminals using a HART modem, see Figure C-3 on page 182. Both the configuration tool

and the RS-485 bus can be connected simultaneously. Configuration data is sent with HART

commands through the HMC to the 3300 transmitter electronics, as illustrated in Figure C-1 on

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