113
Reference Manual
00809-0100-4803, Rev GA
Troubleshooting
September 2017
Troubleshooting
5.4
Engineering Assistant communication
troubleshooting
identifies the most common communication issues between the Engineering Assistant
software and the Rosemount 3051SMV.
Table 5-3. Corrective Action for Engineering Assistant Communication Problems
Symptom
Corrective action
No Communication
between the
Engineering Assistant
software and the
Rosemount 3051SMV
Loop wiring (HART)
•
HART protocol communication requires a loop resistance value between 250 to 1321 ohms, inclusive.
•
Check for adequate voltage to the transmitter. See
“Load limitations” on page 131
.
•
Check for intermittent shorts, open circuits, and multiple grounds.
•
Check for capacitance across the load resistor. Capacitance should be less than 0.1 microfarad.
Engineering Assistant
•
Verify correct COM port selected.
•
Verify laptop computer is not in low energy mode (certain laptops disable all COM ports in low energy mode).
•
Check if HART modem is properly connected.
•
Check if HART driver is loaded and installed. If using a HART USB port modem, install drivers from CD-ROM provided
with USB modem.
•
Check if another HART configuration program, such as AMS Device Manager, is currently open. Only one HART
configuration program may be opened at a time.
•
Verify the COM port buffer setting is set to the lowest setting (1) in the advanced COM port settings and re-boot the
computer.
•
Set the
Device Address
to search All.
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