Emerson Micro Motion SGM Series - Discrete Output Problems

Milliamp output problems and recommended actions (continued)Table 14-7:
Problem Possible causes Recommended actions
Consistently incorrect
mA measurement
• Loop problem
• Output not trimmed correctly
• Incorrect measurement unit configured for
process variable
• Incorrect process variable configured
• LRV and URV are not set correctly
• Check the mA output trim. See
Section 14.15.
• Verify that the measurement units are con-
figured correctly for your application.
• Verify the process variable assigned to the
mA output.
• Check the settings of Upper Range Value
and Lower Range Value. See Section 14.17.
mA output correct at
lower current, but in-
correct at higher cur-
rent
• mA loop resistance may be set too high • Verify that the mA output load resistance
is below the maximum supported load
(see the installation manual for your trans-
mitter).
14.12 Discrete output problems
Discrete output problems and recommended actionsTable 14-8:
Problem Possible causes Recommended actions
No discrete output • Output not powered
• Wiring problem
• Circuit failure
• Verify that the output loop is powered ex-
ternally.
• Check the power supply and power supply
wiring. See Section 14.2.
• Verify the output wiring.
• Contact Micro Motion.
Loop test failed • Output not powered
• Power supply problem
• Wiring problem
• Circuit failure
• Verify that the output loop is powered ex-
ternally.
• Check the power supply and power supply
wiring. See Section 14.2.
• Verify the output wiring.
• Contact Micro Motion.
Discrete output read-
ings reversed
• Wiring problem
• Configuration does not match wiring
• Verify the output wiring.
• Ensure that Discrete Output Polarity is set
correctly.
Troubleshooting
Configuration and Use Manual 161