Emerson Micro Motion 2500, Configuration And Use Manual

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Problem Possible causes Recommended actions
No discrete output • Wiring problem
• Circuit failure
• Check the power supply and power supply
wiring.
• Verify the output wiring.
• Contact customer service.
Loop test failed • Power supply problem
• Wiring problem
• Circuit failure
• Check the power supply and power supply
wiring.
• Verify the output wiring.
• Contact customer service.
Discrete output read-
ings reversed • Wiring problem
• Configuration does not match wiring
• Verify the output wiring.
• Ensure that Discrete Output Polarity is set
correctly.
12.9 Discrete Input problems
Problem Recommended actions
Discrete Input is fixed and does
not respond to input switch Verify that the Discrete Input is wired and configured correctly
for your application.
Internal means that the transmitter will sup-
ply power. External means that an external pull-up resistor and
source are required.
12.10 Using sensor simulation for troubleshooting
When sensor simulation is enabled, the transmitter reports user-specified values for basic
process variables. This allows you to reproduce various process conditions or to test the
system.
You can use sensor simulation to help distinguish between legitimate process noise and
externally caused variation. For example, consider a receiving device that reports an
unexpectedly erratic density value. If sensor simulation is enabled and the observed
density value does not match the simulated value, the source of the problem is likely to be
somewhere between the transmitter and the receiving device.
Sensor simulation requires an Enhanced Core and a communication device.
Important
When sensor simulation is active, the simulated value is used in all transmitter outputs and
calculations, including totals and inventories, volume flow calculations, and concentration
calculations. Disable all automatic functions related to the transmitter outputs and place the loop in
manual operation. Do not enable simulation mode unless your application can tolerate these effects,
and be sure to disable simulation mode when you have finished testing.
Troubleshooting
Configuration and Use Manual 177