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10.15 Check HART Address and Loop Current Mode
If the transmitter is producing a fixed current from the mA output, the Loop Current Mode
parameter may be disabled.
When Loop Current Mode is disabled, the mA output produces a fixed value, and does not
report process data or implement its fault action.
When HART Address is changed, some configuration tools will automatically change Loop
Current Mode.
Tip
Always verify Loop Current Mode after setting or changing HART Address.
Procedure
1. Set HART Address as appropriate for your HART network.
The default address is 0. This is the recommended value unless the transmitter is in a
multidrop network.
2. Set Loop Current Mode to Enabled.
10.16 Check HART burst mode
HART burst mode can cause the transmitter to output unexpected values. Burst mode is
normally disabled, and should only be enabled if another device on the HART network
requires burst mode communication.
1. Check to see if burst mode is enabled or disabled.
2. If burst mode is enabled, disable it.
10.17
Check Lower Range Value and Upper Range
Value
If the process conditions fall below the configured
Lower Range Value (LRV) or rise above the
configured Upper Range Value (URV), the transmitter outputs may send unexpected values.
1. Make a note of your current process conditions.
2. Check the configuration of the LRV and URV.
10.18
Check mA Output Fault Action
mA Output Fault Action controls the behavior of the mA output if the transmitter encounters
an internal fault condition. If the mA output is reporting a constant value below 4 mA or
above 20 mA, the transmitter may be in a fault condition.
Troubleshooting
182 Micro Motion
®
9739 MVD Transmitters