Emerson Hart Rosemount 935 User manual

Reference Manual
00809-0300-4035, Rev AA
October 2021
HART® Communication
Rosemount™ 935 Open Path Gas Detector

2

Contents
Chapter 1 Introduction.............................................................................................................. 5
Chapter 2 Connecting to the HART® Communicator...................................................................7
2.1 Connect HART® Communicator to wiring terminals.....................................................................7
2.2 Connect HART® Communicator to intrinsically safe (IS) port........................................................8
2.3 Connecting two HART® Communicators (primary and secondary master)................................... 9
2.4 Multidrop mode...........................................................................................................................9
Chapter 3 HART® device description language (DDL)................................................................11
Chapter 4 HART® menu structure.............................................................................................13
4.1 Overview menu......................................................................................................................... 13
4.2 Configure menu.........................................................................................................................19
4.3 Service Tools menu....................................................................................................................24
4.4 Statuses.....................................................................................................................................27
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Contents Reference Manual
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1 Introduction
Using digital communication with the Rosemount Rosemount 935 Open Path Detector,
the operator can monitor the status of the detector, determine factory settings, and
initiate field tests.
This document provides guidance for establishing HART® communication and describes
the HART menu structure when using the detector with a HART Hand-held
Communicator, personal computer (PC), or other process interface device that supports
device description language (DDL).
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2 Connectingto the HART®
Communicator
The host connects to the detector via the two-wire 4-20 mA current loop or via the
intrinsically safe (IS) port. Refer to the Rosemount Rosemount 935 Reference Manual for
connection details.
These outputs from the detector represent the analog output channel. They correspond
to the primary variable (PV) and support HART communication.
2.1 Connect HART® Communicator to wiring
terminals
The operator can connect the HART Communicator to the detector at any wiring
termination point in the analog output signal loop.
Procedure
Connect the HART Communicator in parallel with the 500 Ohm load resistor.
The HART connections are non-polarized.
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2.2 Connect HART® Communicator to intrinsically
safe (IS) port
Figure 2-1: HART Connection Block Diagram
A. Rosemount Rosemount 935 Gas Detector
B. 4-20 mA out
C. 4-20 mA current
D. Load resistor, defined in HART standard as 250-600 ohm
E. Ground
F. HART modem
G. Personal computer (PC) with appropriate software
H. Intrinsically safe (IS) output
I. HART Communicator
Procedure
1. To use the IS port, connect the HART Communicator to the detector using the
appropriate communication cable, as described in the Rosemount Rosemount 935
Reference Manual.
2. Switch on the HART Communicator.
If the HART Communicator finds the detector, it displays the Main Menu.
Postrequisites
If the HART Communicator doesn't find the detector, check the connections and verify the
presence of a 500 ohms load resistance in series to the loop.
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2.3 Connecting two HART® Communicators
(primary and secondary master)
A. Rosemount Rosemount 935 Gas Detector
B. 4-20 out
C. 4-20 mA current
D. Load resistor, defined in HART standard as 250-600 ohm
E. Ground
F. HART Communicator
G. HART modem
H. Personal computer (PC) with appropriate software
2.4 Multidrop mode
Optical gas detectors are safety devices and require the 4-20 mA loop for transmitting
important detector status data. Do not use optical gas detectors in conjunction with
multidrop mode. If multidrop mode is required, no gas reading will be available via the
4-20 mA loop.
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3 HART® device description language
(DDL)
The HART protocol incorporates a concept called the DDL that enables all suppliers of
HART instruments to define and document their products in a single, consistent format.
This format can be read by hand-held communicators, personal computers (PCs), and
other process interface devices, regardless of manufacturer, allowing full functionality
from any HART device.
Note
For full compliance with the gas detector and the HART host application, install a HART
Communication Foundation device description (HCF DD) on your machine.
You can download a complete listing of the HCF DD library in the manufacturer and device
type sequence on the HCF home page.
The Rosemount Rosemount 935 device description allows you to present the HART menu
in a graphical mode. However, this option is not supported by all host manufacturers. For
more information about using the graphical mode, please refer to HART host literature.
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4 HART® menu structure
4.1 Overview menu
When you first establish HART® communication, the first menu displayed is the Overview
menu.
Figure 4-1: Overview Menu Structure
Overview
1. Device Status
2. Analog
Output Value
3. Detection
4. Device
Information
1. Device Model
2. Device
Identification
1. Tag
2. Long Tag
3. Manufacturer
4. Model
5. Final
assembly
number
3. Information 1. Date
2. Descriptor
3. Message
6. Device ID
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4. Device
Information
(continued)
4. Revision
Numbers
5. View All
Variables
1. Universal
revision
2. Field device
revision
3. Software
revision
4. Hardware
revision
5. Device Driver
revision
1. Primary
Variable
1. Analog
Output Value
2. Analog
Output (Gauge)
1. Electronics
Temperature
1. Secondary
Variable
2. Electronics
Temperature
(Gauge)
3. Third
Variable
1. Supply
Voltage
2. Supply
Voltage
(Gauge)
4. Fourth
Variable
1. Heater State
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6. Device
Summary
1. Detection
2. Detector Gas Status
3. Electronics
Temperature
4. Supply Voltage
5. Heater Slate
6. Heater Control
7. Operating Time
8. Signal
9. Reference
10. NQ Ratio
11. Gain
12. Gas Type
13. Full Scale
Table 4-1: Overview Menu Options
Number Option Description Field type
1 Device Status Indicates a field device condition. Method
2 Analog Output
Value
The actual analog output of the fire
detection channel.
Read
3 Detection Gas reading in LEL*M. Read
4 Device Information Device information. Menu
5 View all Variables Device variables. Menu
6 Device Summary Device summary. Menu
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4.1.1 Device Information menu
Table 4-2: Device Information Options
Number Option Description Field type
1 Device Model Rosemount 935 Read
2 Device
Identification
Device identification Menu
3 Information Information Menu
4 Revision Numbers Revision numbers Menu
Device Identification menu
Table 4-3: Device Identification Menu Options
Number Option Description Type
1 Tag Text that is associated with the field device
installation (8 characters). The operator
can modify and use this text in any way.
Read
2 Long Tag Text that is associated with the field device
installation (32 characters). The operator
can modify and use this text in any way.
Read
3 Manufacturer Rosemount Read
4 Model Rosemount 935 Read
5 Final assembly
number
A number that is used for identification
purposes and is associated with the overall
field device. Example: 1
Read
6 Device id Device unique identification number.
Example: 1
Read
Information menu
Table 4-4: Information Menu Options
Number Option Description Field type
1 Date Any date chosen by the operator to be
used for any purpose.
Read
2 Descriptor Text associated with the field device that
can be used by the operator in any way.
Read
3 Message Text associated with the field device that
can be used by the operator in any way.
Read
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Revision Numbers menu
Table 4-5: Revision Numbers Menu Options
Number Option Description Field type
1 Universal rev HART® protocol revision. Example: 7 Read
2 Fld dev rev Field device revision. Example: 1 Read
3 Software rev Field device software revision. Example: 1 Read
4 Hardware rev Field device hardware revision. Example: 1 Read
5 Device Driver
Revision
Device driver revision. Example: 01 Method
4.1.2 View All Variables menu
Table 4-6: View All Variables Menu Options
Number Option Description Field type
1 Primary Variable Primary variable Menu
2 Secondary Variable Secondary variable Menu
3 Third Variable Third variable Menu
4 Fourth Variable Fourth variable Menu
Primary Variables menu
Table 4-7: Primary Variable Menu Options
Number Option Description Field type
1 Analog Output
Value
The actual analog output of the fire
detection channel.
Read
2 Analog Output The actual analog output of the fire
detection channel.
Gauge
Secondary Variables menu
Table 4-8: Secondary Variables Menu Options
Number Option Description Field type
1 Electronics
Temperature
Electronics temperature of the detector in
degrees C.
Read
2 Electronics
Temperature
Electronics temperature of the detector in
degrees C.
Gauge
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Third Variables menu
Table 4-9: Third Variables Menu Options
Number Option Description Field type
1 Supply Voltage Input voltage of the detector. Read
2 Supply Voltage Input voltage of the detector. Gauge
Fourth Variables menu
Table 4-10: Fourth Variables Menu Options
Number Option Description Field type
1 Heater State Indicates the current state of the heater
(ON or OFF).
Read
4.1.3 Device Summary menu
Table 4-11: Device Summary Menu Options
Number Option Description Field type
1 Detection Gas reading in LEL*M. Read
2 Detection Gas
Status
Indicates a field device condition. Read
3 Electronics
Temperature
Detector's electronics temperature in
degrees C.
Read
4 Supply Voltage Detector's input voltage. Read
5 Heater State Indicates the current state of the heater
(ON or OFF).
Read
6 Heater Control Indicates if the heater control is manual or
automatic.
Read
7 Operating Time Displays the detector's total operating
time from last power up.
Read
8 Signal Signal reading. Read
9 Reference Reference signal reading. Read
10 NQ Ratio Normalized ratio. Read
11 Gain Detector's current amplifying level. Read
12 Gas Type Ethylene, methane, or propane. Read
13 Full Scale Ethylene: 8 LEL*M
Methane and propane: 5 LEL*M
Read
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4.2 Configure menu
Figure 4-2: Configure Menu Structure
Configure
1. Guided Setup 1. Initial Setup
2. Optional
Setup
1. Configure
Device
1. Gas Type
2. Heater Mode
Setting
3. Loop Current
Mode
1. Device Setup2. Manual Setup 1. Gas Type
2. Window
Heater
3. Loop Current
Mode
1. Heater
Control
2. Heater on
temp
2. HART 1.
Communication
Settings
1. Poll address
2. Change
Polling Address
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1. Manual Setup
(continued)
3. Device
Information
3. Manufacturer
1. Device Model
2. Device
Identification
1. Tag
2. Long Tag
4. Model
5. Final
assembly
number
6. Device ID
3. Information 1. Date
2. Descriptor
3. Message
4. Revision
Numbers
1. Universal revision
2. Field device revision
3. Software revision
4. Hardware revision
5. Device Driver Revision
Table 4-12: Configure Menu Options
Number Option Description Field type
1 Guided Setup Guided setup Menu
2 Manual Setup Manual setup Menu
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