51-12
Flowserve Corporation, Valtek Control Products, Tel. USA 801 489 8611
time a Quick-Cal is performed based on the setting
of the rotary
Gain switch.
If the rotary
Gain selector switch is set to E with the
auto tune switch
On, a Flowserve nominal
response tuning set will be calculated and used.
If the rotary
Gain selector switch is set to D, C, B, or
A with the Auto Tune switch On, progressively
lower gain settings will be calculated and used.
If the rotary
Gain selector switch is set to F, G, or H
with the
Auto Tune switch On, progressively higher
gain settings will be calculated and used.
Off forces the positioner to use one of the factory
preset tuning sets determined by the rotary
Gain
selector switch. Settings
A through H are progres-
sively higher gain predefined tuning sets.
6. Config. Switches — By selecting
Enabled, the
Logix 500 will read all of the configuration switches
each time a
Quick-Cal is performed to determine
the configuration.
Selecting
Disabled retains the last configuration in
memory (from the last successful calibration) be-
fore the switch was set to
Disabled. With this setting
a
Quick-Cal only zeros and spans the positioner.
Setup of the Cal DIP Switch for the Quick
Calibration operating mode
1. Select
Auto if the valve/actuator assembly has an
internal stop in the 100% stroke position. In
Auto
mode the positioner will fully close the valve and
register the 0% position and then open the valve to
the stop to register the 100% position when per-
forming a self-calibration. See detailed instructions
in the next section on how to perform an auto
positioner calibration.
2. Select
Jog if the valve/actuator assembly has no
calibration stop in the open position. In the
Jog
mode the positioner will fully close the valve for the
0% position and then wait for the user to set the
open position using the
Jog buttons labeled with the
up and down arrows. See the detailed instructions
in the next section on how to perform a manual
calibration using the
Jog buttons.
WARNING: During the Quick-Cal operation the
valve may stroke unexpectedly. Notify proper
personnel that the valve will stroke, and make
sure the valve is properly isolated.
Quick-Cal Operation
The
Quick-Cal button is used to locally initiate a calibra-
tion of the positioner. Pressing and holding the
Quick-Cal
button for approximately three seconds will initiate the
calibration. If the
Config-Switches option is enabled, the
settings of all the configuration switches are read and
the operation of the positioner adjusted accordingly.
The
Gain Selector switch is also read and action will be
taken to adjust the gain according to the settings of the
calibration switches as described in the previous section.
A
Quick-Cal can be aborted at any time by briefly pressing
the
Quick-Cal button and the previous settings will be
retained.
If the
Quick calibration switch (not to be confused with the
Quick-Cal button) is set to Auto and the valve/actuator
assembly has the necessary internal stops, the calibra-
tion will complete automatically. While the calibration is in
progress you will notice a series of different lights flash-
ing indicating the calibration progress. When the lights
return to a sequence that starts with a green light, the
calibration is complete. (See the appendix for an expla-
nation of the various light sequences.)
WARNING: When operating using local control of the
valve, the valve will not respond to external com-
mands. 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 calibration
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 posi-
tion is automatically always set at the seat. If an el-
evated 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 manu-
ally position the valve to approximately 100%. When the
valve is approximately 100% open press both
Jog but-
tons 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 cali-
bration is complete. (See the appendix for an explanation
of the various light sequences.)
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 re-
turn to normal operation, briefly press
Quick-Cal.
Factory reset — hold
Quick-Cal button while applying
power and all of the internal variables including calibra-
tion will be reset to factory defaults. The positioner must
be re-calibrated after a factory reset. Tag names and other
user configured limits, alarm settings, and valve informa-
tion will also need to be restored. A factory reset will al-
ways reset the command source to analog 4-20 mA.
