Flowserve Logix 3200IQ Digital Positioner - Manual (Page 30)

Flowserve Corporation 1350 N. Mountain Springs Parkway 1978 Foreman Dr.
Flow Control Division Springville, Utah 84663-3004 Cookville, TN 38501
www.flowserve.com Phone: 801 489 2233 Phone: 931 432 4021
FCD AXAIM3200-00 9/04 Page: 30 of 32
© 2004, Flowserve Corporation, Printed in USA
Automax Logix 3200IQ Digital Positioner
Installation, Operation and Maintenance Instructions
Probable Cause
Current source below 3.6 mA without
AO card or 3.85 mA with AO card
Incorrect wiring polarity
Voltage of current source is not high enough
Current source bandwidth not limited to
25 Hz
Maximum cable length or cable impedance
exceeded
HART modem connected to PC RS-232 port
not receiving enough power
Interference with I.S. barrier
Current Source stripping (filtering)
HART signal
Unit is in digital command mode
Error occurred during calibration
Positioner tubing backwards
Stem position sensor mounting is off 180°
Stroke not calibrated
Tight shutoff (M.P.C)* is active
Customer characterization or soft stops
active
Stroke not calibrated
Inner-loop hall sensor not connected
Wrong air action entered in software
Actuator tubing backward
Electro-pneumatic converter malfunctioning
Control parameter inner-loop offset is too
high/low
Contamination of the driver module
Control tuning parameters not correct
Packing friction high
Corroded or dirty spool valve
Corrective Action
Verify current source is outputting at least 3.6 mA with
AO card or 3.85 mA with AO card
Check wiring for correct polarity
Verify that current source can supply at least 10 V
Maximum allowable current source rate of change is
924 mA per second
Check cable conduction size, length and capacitance.
Refer “Cable Requirements”
Verify laptop battery is not low
Must use HART-compatible I.S. barrier
Use the HART filter (VHF) available from Flowserve
Switch to analog command mode by doing a
Command Source Reset from the local interface or
with a handheld communicator or SoftTools, please
refer to “Command Source Reset”
Check blink codes on positioner and correct calibration
error. Recalibrate
Re-tube the actuator
Remount position sensor
Perform QUICK-CAL
Verify settings using PC or handheld software
Verify customer characterization and soft stops
Check DIP switch settings and calibrate valve stroke
Verify hardware connections
Check ATO (Air-to-open) and ATC (Air-to-close)
settings. Recalibrate
Verify ATO/ATC actuator tubing
Replace electro-pneumatic converter
Adjust inner-loop offset and see if proper control
resumes
Check air supply for proper filtering and meeting ISA
specifications ISA-7.0.01. Check the spool valve for
contamination
Adjust gain settings using local gain switch
Enable the stability DIP switch on the local interface
and recalibrate. If problem persists, enable pressure
control with handheld communicator or SoftTools
and recalibrate
Disassemble and clean spool valve
Failure
No LED is blinking
Erratic communications
Unit does not respond to
analog commands
Valve position reading is
not what is expected
Position is driven fully
open or closed and will
not respond to command
Sticking or hunting
operation of the
positioner
*M.P.C.: Minimum position cutoff
Troubleshooting