10
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User Instructions Logix 520si - LGENIM2520-00 09/09
light, the calibration is complete. (See the appendix for
an explanation of the various light sequences.)
WARning: When operating using local control of the
valve, the valve will not respond to external commands.
Notify proper personnel that the valve will not respond
to remote command changes, and make sure the valve
is properly isolated.
If the Quick calibration switch is set to Jog, the calibra-
tion will initially close the valve then cause a small jump
in the valve position. The jog calibration process will
only allow the user to manually set the span; zero
position is automatically always set at the seat. If an
elevated zero is needed a handheld or other PC based
configuration software is required. The LEDs will then
flash in a sequence of Y-R-R-G (yellow-red-red-green)
which indicates the user must now use the Jog keys to
manually position the valve to the desired 100% posi-
tion. Now press both Jog buttons simultaneously to
proceed to the next step. The valve will then stroke and
then wait while flashing the Y-R-R-G sequence again,
allowing the user to adjust the valve position a second
time to exactly 100% using the Jog buttons. When the
stem is properly positioned press both Jog buttons
simultaneously again to register the 100% position and
proceed. No more user actions are required while the
calibration process is completed. When the lights return
to a sequence that starts with a green light the calibra-
tion is complete. (See the appendix for an explanation
of the various light sequences.)
9.5 Local control of valve position
Can be done from the user interface by holding both jog
buttons and then simultaneously pressing the Quick-Cal
button. While in this mode the LEDs will flash a Y-G-
R-R(yellow-green-red-red) sequence. To exit the local
control mode and return to normal operation, briefly
press the Quick-Cal button.
STOP!
9.6 Factory reset
Hold Quick-Cal button while applying power and all of the
internal variables including calibration will be reset to fac-
tory defaults. The positioner must be re-calibrated after a
factory reset. Tag names and other user configured limits,
alarm settings, and valve information will also need to be
restored. A factory reset will always reset the command
source to analog 4-20 mA.
9.7 Special settings
Several adjustments to the Logix 520si such as split-range,
MPC, soft stop, etc. cannot be set using the local interface.
To set these parameters please use SoftTools software or
a HART handheld.
