Flowserve Logix 520MD+ User Instructions Download

Page: 23 / 56

User Instructions - Logix® 520MD+ Series Digital Positioner

FCD LGENIM0105-00

Field Trial Version – Printed October 28, 2011

9 POSITIONER FUNCTIONS (No

Display Required)

The  following  features  can  be  performed  using  the  local
interface.    No  display  is  required  for  these  features.
Additional  features  are  offered  with  the  use  of  a  display,
Handheld or DTM.

NOTE: In order to prevent unintentional adjustments of

the configuration, tuning, or control of the valve, the Tamper
Lock  feature  may  be  used.    This  is  set  in  the  DTM  and
disables the buttons and menus except for the ability to view
the status of the positioner.  When locked, the positioner may
be  temporarily  unlocked  by  entering  a  PIN.    (An  LCD  is
required  to  enter  the  PIN.)    Or,  the  positioner  can  be
unlocked from the DTM.

9.1

Live Manual Tuning (Adjusting the
Gain)

Use  the  Selectable  GAIN  Switch  to  adjust  the  gain  at  any
time  during  operation.  This  adjustment  takes  effect
immediately.    For  faster  response  select  settings  above  “E”
(F-J).    For  more  stable  response,  select  settings  below  “E”
(B-D).  See Figure 16: Selectable GAIN Switch.

9.2

Local Control Of Valve Position

To manually adjust the position of the valve regardless of the
input command (analog or digital), press and hold the

▲

Up,

▼

Down and

◄

BACK buttons for about 3 seconds. The

▲

Up,

▼

down buttons can then be used to position the valve.

While in this mode the LED‘s will flash a GRRY (green-red-
red-yellow) sequence. To exit the local control mode and
return

normal

operation,

briefly

press

the

►

ACCEPT/QUICK-CAL button.

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.

9.3

Command Source Reset

Performing a command source reset will reset the command
source to analog if it has been inadvertently left in digital
mode. This is done by holding down both the

▲

Up and

▼

Down

buttons,

then

briefly

pressing

the

►

ACCCEPT/QUICK-CAL button.

9.4

Factory Reset

To perform a factory reset, hold

►

ACCEPT/QUICK-CAL

button  while  applying  power.    All  of  the  internal  variables
including  calibration  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 information will also be lost and need to be restored.  A
factory reset will always reset the command source to analog
4-20 mA.

NOTE: Once the Multi-Function Card (MFC) type has

been configured, the type selection will still remain after a
factory reset.

WARNING: Performing a factory reset may result in the

inability to operate the valve until reconfigured properly.
Notify proper personnel that the valve may stroke, and make
sure the valve is properly isolated.

9.5

Viewing Version Numbers

The version number of the embedded code may be checked
at any time except during a calibration. To see the major
version number, hold the

▲

Up button. This will not alter the

operation of the unit other than to change the blink sequence
to 3 blinks indicating the major version number. Holding the

▼

Down button will give the minor version number without

affecting operation. The version codes are interpreted by
adding up the numbers assigned according to the following
table:

Table 14: Viewing Version Numbers

Color

First Blink