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User Instructions - Logix® 520MD+ Series Digital Positioner

FCD LGENIM0105-00

Field Trial Version – Printed October 28, 2011

used  to  tightly  close  or  open  the  valve.    It  is  used  when  a
tight  seal  is  needed  or  when  debris  or  friction  may
otherwise interfere with complete closure.   When the valve
is  commanded  past  the  Shutoff  points,  the  pilot  relay  will
direct full supply pressure to the appropriate port, applying
all available force to close (or open) the valve.  The Shutoff
points apply to the Final Command.

CAUTION: Changing the Shutoff limits may cause the

valve to fully open or fully close after the command passes
a set limit.

Though Shutoff and Soft Limit features should not be used
together, if both are set, the greater of the two settings will
take  precedence  at  the  closed  end;  and  the  lesser  of  the
two settings will take precedence at the open end.

10.3.9 Configuration (Set Time and Date)

The positioner has an internal clock.  The clock allows time
and  date  information  to  be  stored  with  alarms  and  other
events.  The clock does not account for daylight savings.

Set Time and Date – Use the

▲

Up and

▼

Down buttons to

set the time and date. The format of the time and date is
displayed above the input fields.

10.3.10 Configuration (User Preferences)

The User Preferences menu allows the user to format how
information is displayed.

The following table shows the available options.  By default
the  positioner  is  set  to  show  information  in  International
System  (SI)  units.    To  change  all  units  to  North  American
(English),  make  the  selection  under  All  Units.    Each
selection can also be changed individually.

Table 17: User Preference Options

Units/Format

International

System (SI)

(Default)

North

American

(English)

Other

Options

All Units

North American

Pressure

bar

PSI

kg/cm2,

kPa

Force

lbf

Temperature

degrees C

degrees F

Air Flow

slph

scfm

slpm,

Nm3/hr

Actuator Area

cm2

in2

Date Format

Day.Mon.Year

Mon/Day/Year

Number

Comma

Decimal Point

LCD  Orientation    –  Use  this  selection  to  turn  the  turn  the
display upside down (180 degrees).  Use this feature when
the positioner is mounted upside down.

10.3.11 Configuration (Burst Mode)

Burst Mode continuously transmits HART information.

On/Off – Use this feature to turn burst mode on and off.

10.3.12 Configuration (Positioner Revs)

Positioner revisions are shown in this menu.

SW Rev –The revision of the embedded software.
Bld Date –The date of the embedded software build.
Bld Time –The time of day of the embedded software build.
HW Rev –The revision of the main board.
CPU Rev – The revision of the CPU.
HART Ver –The revision of the HART protocol (5, 6, or 7).

10.3.13 Configuration (Factory Reset)

At times, it may be convenient to reset all of the variables
to a default state. In this case, perform a Factory Reset.

Factory  Reset  –  Use  this  feature  to  reset  all  variables  to
their  factory  default  state.    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  will  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.

10.3.14 Card 1 (or Card 2)

Two  slots  are  available  for  auxiliary  cards.    The  Multi-
Function  Card  (MFC)  can  be  configured  for  analog  output
(AO),  Discrete  Input  (DI)  and  Discrete  Output  (DO).    The
Safety  Discrete  Output  card  (Safety  DO)  provides  highly

►

Configuration

►

Set Date & Time

►

Configuration

►

User Preferences

►

All Units

►

Pressure Units