Fisher IM Suppplement: Using FIELDVUE Instruments with the Smart HART Loop Interface and Monitor Manuals & Guides

Instruction Manual Supplement

D103263X102

FIELDVUE Instruments

October 2018

Using FIELDVUE™ Instruments with the Smart

®

HART

Fisher™ FIELDVUE instruments can be used in conjunction with a HART interface module, such as the Smart HART
Loop Interface and Monitor (HIM) from Moore Industries, to provide additional diagnostic coverage to non-HART
hosts. Installed transparently across the 4‐20 mA instrument loop, the HIM receives the HART digital process data and
converts the digital information into up to three scalable, isolated analog (4‐20 mA) process signals and two relay
outputs that are readily accepted by an existing control system, such as a DCS or PLC. For additional information on
the HIM, refer to Smart HART Loop Interface and Monitor documentation
www.miinet.com.

The relay outputs are configurable within the HIM and can be used to indicate instrument status and detailed alert
information. For example, when a DVC6200 SIS digital valve controller in a Safety Instrumented System (SIS)
application instructs the safety valve to move during the partial stroke test, the HART interface module receives the
digital signal representing valve position. The HIM reads this signal, and, depending on the Fail Safe mode, energizes a
relay at a configured trip point (such as 90%). The relay output is sent to the control system verifying the desired
position has been achieved.

When the digital valve controller instructs the valve to return to the open position, the HIM energizes a second relay
when the valve is fully open. This allows the control system to verify and report that the valve is fully reopened and the
test is complete. Depending on how the HIM is wired to the control system, the relay outputs may be normally open
(NO) or normally closed (NC) contacts. In this example, the relay outputs are configurable in the HIM, and do not
reflect the status byte configuration in the FIELDVUE instrument.

Loop Interface and Monitor (HIM)

or the Moore Industries web site at

Figure 1. Moore Industries HART Loop Monitor

www.Fisher.com

FIELDVUE Instruments

October 2018

Instruction Manual Supplement

D103263X102

Additionally, the discrete relay output could also be used for various other alerts generated by the DVC6200 SIS, such
as “Diagnostics in Progress, “Valve Stuck Alert” etc.

The HIM operates from an external 24 volts DC ± 10% voltage source and connects to the 4‐20 mA control signal lines.

The HIM requests information from the FIELDVUE instrument. The FIELDVUE instrument responds by sending the
appropriate data. Figure 2 shows a typical installation of a FIELDVUE instrument with the HIM. The HIM is not
recommended for FIELDVUE instrument applications involving split ranging.

Figure 2. FIELDVUE DVC6200 SIS Digital Valve Controller Installed with a Moore Industries HART Loop Monitor

X0079

FIELDVUE DVC6200 SIS

Digital Valve Controller

HART
Digital
Communication

Smart HART Loop

Interface and Monitor

4‐20 mA Valve Control Signal

with Superimposed
HART Digital Signal

Valve 90% Open

Relay #1

Relay #2

Valve Full Open

Valve Travel

Output Pressure

4-20 mA

4-20 mA

Control
System

Installation Considerations

The HIM design allows two different DIN‐rail mounting options:

D 32mm (EN50035) G rail

D 35mm (EN50022) top hat rail

The HIM dimensions are shown in figure 3.

2

Instruction Manual Supplement

D103263X102

Figure 3. HIM HART Loop Monitor Dimensions

65 mm

(2.56 in)

100 mm
(3.94 in)

FIELDVUE Instruments

October 2018

130 mm

(5.1 in)

118 mm

(4.7 in)

Figure 4 shows the proper installation of a FIELDVUE digital valve controller with the HIM. The schematic depicts a
Fisher HF340 HART filter in the loop when the digital valve controller is operating with a 4‐20 mA control signal. If the
digital valve controller is operating from a 24 volt DC source, a Fisher LC340 line conditioner is substituted for the
HART filter. The necessity of a HART filter for 4‐20 mA operation depends upon the control system; the HIM does
not add a requirement for a filter. Refer to the appropriate FIELDVUE instrument quick start guide or instruction
manual for detailed installation instructions. For instructions on installing the HART filter, refer to instruction manual

D102796X012

. For instructions on installing the LC340 line conditioner, refer to instruction manual D102797X012.

See Related Fisher Documents on page 13.

In addition to performing the designed function, the filter or line conditioner also provides a convenient method for
connecting field wiring between the control system, the signal converter, and the FIELDVUE instrument. If no filter or
conditioner is required, the HF341 communication tap is available. This device provides the connection convenience
but without filter action (straight‐through). When a DLC3010 digital level controller is used with the HIM, a HART filter
or line conditioner is not required (see figure 5). However, the HF341 communication tap may be used for connection
convenience.

3

FIELDVUE Instruments

October 2018

Instruction Manual Supplement

D103263X102

Figure 4. Example HIM Smart HART Loop Interface and Monitor Installation with a FIELDVUE Digital Valve Controller

HAZARDOUS AREA NON‐HAZARDOUS AREA

FISHER HF340 HART FILTER
OR LC340 LINE CONDITIONER

+

-

FIELDVUE DIGITAL

VALVE CONTROLLER

INTRINSIC
SAFETY BARRIER
IF REQUIRED BY
APPLICATION

+

-

4-20 mA

+ HART

HART LOOP INTERFACE
AND MONITOR (HIM)

COMMFLD

SYS

-

ANALOG
OUTPUT

+

+INB

+OUT

−INB

−OUT

99.999
PERC

+

ANALOG OUTPUT TO
FIELDVUE INSTRUMENT

-

CONTROLLER ANALOG
INPUT CHANNEL

CONTROLLER DISCRETE
INPUT CHANNEL

CONTROL ROOM

NOTE:
REFER TO SMART HART LOOP INTERFACE AND MONITOR USERS' MANUAL

224‐778‐00

WIRING INFORMATION.

AVAILABLE FROM MOORE INDUSTRIES FOR MORE DETAILED

DISCRETE

OUTPUT

24 VDC POWER

Figure 5. Example HIM Smart HART Loop Interface and Monitor Installation with a FIELDVUE Digital Level Controller

HAZARDOUS AREA NON‐HAZARDOUS AREA

ANALOG INPUT CHANNEL
FOR PRIMARY VARIABLE
(PV) FROM FIELDVUE
INSTRUMENT)

+

-

+

FIELDVUE
DIGITAL LEVEL
CONTROLLER

SENSE RESISTOR

-

INTRINSIC SAFETY
BARRIER IF REQUIRED
BY APPLICATION

4-20 mA

+ HART

IN

-

+

OUTPUT

IN

+

ANALOG

(230 TO 600 OHMS)

CONTROLLER ANALOG
INPUT CHANNEL

CONTROLLER DISCRETE
INPUT CHANNEL

8.6

HART LOOP INTERFACE

IN

CONTROL ROOM

AND MONITOR (HIM)

NOTE:
REFER TO SMART HART LOOP INTERFACE AND MONITOR USERS' MANUAL

224‐778‐00

WIRING INFORMATION.

IN ORDER TO MEET THE HART LOOP IMPEDANCE REQUIREMENT, THERE MUST
BE BETWEEN 230 AND 600 OHMS IN SERIES WITH THE VOLTAGE SOURCE.

AVAILABLE FROM MOORE INDUSTRIES FOR MORE DETAILED

4

DISCRETE

OUTPUT

24 VDC POWER

Instruction Manual Supplement

D103263X102

FIELDVUE Instruments

October 2018

HIM Configuration

The HIM Operating Parameters can be configured using HIM PC Configuration Software. The software is composed of
the following sections as shown in figure 6.

1. HIM Status and Information Section The left side of the screen includes seven boxes that display the different

settings of the attached HIM.

Program Status—Displays the activity of the connected HIM. It indicates if the unit is Idle, Uploading,
Downloading, Monitoring or Searching.

HIM Device Info—Displays the individual characteristics of the attached HIM, such as its identity, hardware and
software revisions, and the last date that the device was configured.

HIM Tag—A phrase used to identify the HIM.

HIM Device Status—Displays functioning of the HIM. OK is displayed if it is operating normally, otherwise an error

message is displayed.

HIM Displayed Data—This shows what appears on the display at the front of the HIM. This information is
programmed on the Display page.

Progress—This bar stays in motion any time the HIM is monitoring, uploading or downloading.

Communication Status—Monitors the PC software's ability to communicate with the HIM.

Figure 6. The HART Menu Sets the HART Communications Parameters Using the HIM PC Configuration Software

5