Discrete Input Problems; Using Sensor Simulation For Troubleshooting - Emerson Micro Motion 2500 Configuration And Use Manual

Problem Possible causes
No discrete output •
•
Loop test failed •
•
•
Discrete output read- •
ings reversed •
12.9

Discrete Input problems

Problem
Discrete Input is fixed and does
not respond to input switch
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.
Configuration and Use Manual
Wiring problem
Circuit failure
Power supply problem
Wiring problem
Circuit failure
Wiring problem
Configuration does not match wiring
Recommended actions
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.
Recommended actions
• Check the power supply and power supply
wiring.
• Verify the output wiring.
• Contact customer service.
• Check the power supply and power supply
wiring.
• Verify the output wiring.
• Contact customer service.
• Verify the output wiring.
• Ensure that Discrete Output Polarity is set
correctly.
Troubleshooting
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