OleumTech H Series - 12. TROUBLESHOOTING; 1. RS485; 2. HART

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DIFFERENTIAL PRESSURE TRANSMITTER - USER GUIDE
12. TROUBLESHOOTING
1. RS485
a. MODBUS read failures:
i. Verify that you are providing enough power and the load
resistance meets normal working requirements.
ii. Check the unit for damage or malfunction.
iii. Verify that the configuration for RS485 communication matches
on the unit as well as on the software/PLC being used.
iv. Verify the wiring for RS485 communication to the PC/PLC.
v. Verify that the LCD is on the main screen, cycling through the
configuration settings can cause a timeout error to appear when
trying to use RS485 to communicate.
vi. If the MODBUS registers are not populated with any data, verify
the correct register addresses are set by referencing the register
table.
vii. If ERR15 shows on the LCD as well as on the software or PLC being
used, factory reset the device.
b. The device is reporting incorrect measurements:
i. Verify the wiring using the provided diagrams and ensure a good
connection.
ii. If pressure values are dropping, ensure that there is a proper seal
between connections to prevent leakage. If the pressure values
remain that same even while applying/increasing pressure, ensure
there is nothing blocking the pressure.
iii. Zero the unit under atmospheric conditions.
iv. If values are larger or outside the anticipated range, verify that
the configured range settings are correct or preform the
appropriate calibration. Determining if there are temperature
fluctuations in the installation can also help identify what could be
causing these values.
c. How to escape the advanced settings mode:
i. If the device is held in advanced settings mode or has an "Expert"
message showing on all screens, first disconnect power from the
device. Clear out any possible obstructions that may be jammed
or compressing the 2 button and then power the device back on.
Upon start up there should be no "Expert" message displayed.
2. HART
a. HART Communication failures:
i. Verify that you’re providing enough power and the load resistance
meets normal working requirements.
ii. Check the unit for damage or malfunction.
iii. Verify the wiring to the HART module / HART device.
iv. Verify that the ID is correctly set on the device when using HART
software (Multidrop).
v. Multi-drop requires unique IDs and final assembly numbers in
order to communicate.
b. The device is reporting incorrect measurements:
i. Verify the wiring using the provided diagrams and ensure a good
connection.
ii. If pressure values are dropping, ensure that there is a proper seal
between connections to prevent leakage. If the pressure values
remain that same even while applying/increasing pressure, ensure
there is nothing blocking the pressure.
iii. Zero the unit under atmospheric conditions.
iv. If values are larger or outside the anticipated range, verify that
the configured range settings are correct or preform the
appropriate calibration. Determining if there are temperature
fluctuations in the installation can also help identify what could be
causing these values.
c. How to escape the advanced settings mode:
i. If the device is held in advanced settings mode or has an "Expert"
message showing on all screens, first disconnect power from the
device. Clear out any possible obstructions that may be jammed
or compressing the 2 button and then power the device back on.
Upon start up there should be no "Expert" message displayed.