Checking The Hart Communication Loop; Checking The Communication Device - Emerson Micro-Motion 2400S Configuration And Use Manual

Troubleshooting
11.14.4

Checking the HART communication loop

To check the HART communication loop:
1. Verify that the loop wires are connected as shown in the wiring diagrams in the transmitter
installation manual.
2. Ensure that the internal/external power configuration matches the wiring. If external power is
being used, verify power supply to the output.
3. Remove analog loop wiring.
4. Install a 250 Ω resistor across the mA terminals.
5. Check for voltage drop across the resistor (4–20 mA = 1–5 VDC). If voltage drop < 1 VDC,
add resistance to achieve voltage drop > 1 VDC.
6. Connect the Communicator directly across the resistor and attempt to communicate (poll).
If your HART network is more complex than the wiring diagrams in the transmitter installation
manual, either:
• Contact Micro Motion. See Section 11.3.
• Contact the HART Communication Foundation or refer to the HART Application Guide,
available from the HART Communication Foundation on the Internet at www.hartcomm.org.

11.15 Checking the communication device

Ensure that your communication device is compatible with your transmitter.
Communicator
The 375 Field Communicator is required, and must contain the appropriate device description. The
device description for the Model 2400S transmitter with analog outputs is
To check the device descriptions:
1. Turn on the Communicator, but do not connect it to the transmitter.
2. When the words
3. Select
OFFLINE
4. Select
New Configuration
5. Select
Micro Motion
6. Ensure that the correct device description for your transmitter is listed.
If the correct device description is not found, a Generic Device menu is displayed. Contact
Micro Motion to obtain the correct device description.
ProLink II
ProLink II v2.4 or later is required. To check the version of ProLink II:
1. Start ProLink II.
2. Open the
3. Click on
146
No device found
.
.
.
menu.
Help
.
About ProLink
appear, press .
OK
®
Micro Motion Model 2400S Transmitters with Analog Outputs
.
2400SMass flo