Emerson Series 3000 MVD User Manual

Page of 348
Configuration and Use Manual
225
Diagnostics and Troubleshooting
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3. Poll to make a connection to the core processor.
4. When the core processor is found, click 
ProLink > Configuration > Device
 and set the 
Modbus address to 
1
.
5. Click 
Apply
.
6. Disconnect ProLink II.
7. Reconnect the RS-485 wiring between the Series 3000 device and the core processor.
To avoid this problem, always power down the transmitter before removing the connector wiring 
bracket.
Note: Do not confuse the Modbus address of the core processor with the Modbus address of the 
transmitter. The Modbus address of the core processor is accessible only when you connect directly to 
the core processor.
22.10
I/O problems
If you are experiencing problems with I/O, use Table 22-9 to identify an appropriate remedy.
Table 22-9
I/O problems and remedies
Symptom
Possible cause
Possible remedy
No mA output 
and 
no frequency output 
or loop 
test failed
Power supply problem
Check power supply and power-supply wiring. 
See Section 22.11.
Fault condition present if fault 
indicators are set to downscale or 
internal zero
Check the fault indicator settings to verify 
whether or not the transmitter is in a fault 
condition. See Section 8.4.2 to check the mA 
fault indicator or Section 8.5 to check the 
frequency fault indicator.
If a fault condition is present, see Section 22.7.
mA output < 4 mA
Process condition below value 
configured for 4 mA
Verify process.
Verify or change the 4 mA value. See 
Section 8.4.4.
Fault condition if fault indicator is set to 
internal zero
Check the fault indicator settings to verify 
whether or not the transmitter is in a fault 
condition. See Section 8.4.2.
If a fault condition is present, check the active 
alarm log. See Section 22.6.
Open in wiring
Verify all connections.
Bad mA receiving device
Check the mA receiving device or try another 
mA receiving device. See Section 22.11.6.
Bad output circuit
Measure DC voltage across output to verify that 
output is active.
Test output. See Section 16.4.4.