KROHNE BM 70 A, BM 700, BM 702, BM 70 P Remote Operation Instructions

© KROHNE 12/2000

Remote Operation

Instructions

HART Communicator 275

Asset Management Solutions (AMS)

BM 70 A/P, BM 700, BM 702

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Remote Operation Instructions BM 70 A/P, BM 700, BM 702 HART

1 General Information 3

1.1 Configuring Instruments for Multidrop 3

2 IDs and Revision numbers 3

3 Implementation Peculiarities 3

4 HART Communicator 275 (HC275) 4

4.1 Installation 4

4.2 Operating 4

4.3 Known HC275 (4.9) Shortcomings 4

5 Asset Management Solutions (AMS) 4

5.1 Installation 4

5.2 Operating 5

5.3 Known AMS (5.0) Shortcomings 6

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Remote Operation Instructions BM 70 A/P, BM 700, BM 702 HART

1 General Information

The BM 70 A/P, BM 700, BM 702 are all the two-wire transmitters with 4..20mA current output and HART® capability.
General characteristics of the BM70 X HART® interface:

•

Multidrop Mode is supported.

•

Burst Mode is not supported.

Electrical connection (point-to-point or multidrop): refer to sections 4.1 – 4.4 of the

Instructions. BM 70 A/P, BM 700, BM 702“.

„Installation and Operating

1.1 Configuring Instruments for Multidrop

There are differences in configuring instruments for multidrop mode from remote or via device local keypad.

•

If the instrument is entering multidrop via HART® interface (any application can be used), i.e. its bus address is

changed from ‘0’ to any allowed, then all the necessary operation with the instrument current output are done
automatically (by the HART® transm itter) .

•

If the instrument local keypad is used, the user must manually carry out the three assignments:

1. Set the desirable bus address (Fct. 3.3.6),

2. Set the current output range to “4 – 20 mA” (Fct. 3.3.2),

3. Switch the current output function to “Off” (Fct. 3.3.1) and store configuration.

2 IDs and Revision numbers

The HART Device Descriptions described in this document have the following IDs and revision numbers:
Manufacturer ID: 69 (0x45)
Device Type: 249 (0xF9)
Device Revision: 11 (0x0B)
DD Revision: 2
HART Universal Revision: 5
HC 275 OS Revision:
AMS Version:

≥
≥

4.9

5.0

For information about Transmitter Revisions and related Device Descriptions refer to the KROHNE HART Device
List.

3 Implementation Peculiarities

As for all previous BM 70 X DD revisions there are some implementation peculiarities, caused by either restrictions of
the DDL / AMS or introduced deliberately – to restrict the usage/access to some device functionality.
The list of implementation peculiarities/restrictions follows:

•

The values in the

unchanged in operation. The user should not have access to these values. Therefore the service data is made
inaccessible for offline device configuration (it is open for live device provided the user is capable to get
authorization as specia list) .

•

The

•

The BM 70 A/P /700 /702 HART® transmitter interacts with the instrument mastering SW via special interface

Conversion Table

functions. Their actual set impose some display-related restrictions: functions
of the display) and
display submenu (3.2) is left out (i.e. is not maintained by the instrument HART® application layer) – the local
instrument user might configure the display settings without any impact on the remote HART® bus master.
Hence one important consequence must be pointed out: the units for measurements on HC275 screens/AMS
faceplates coincide with the ones for configuration parameters (say, for ‘Level’ measurements – with the units for
‘Tank height’, ‘Block distance’, etc.) but not with the ones that are set via display menu (3.2.2, 3.2.3). If the user

Service

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menu are generally set by Krohne or possibly by the Service technician, and remain

is excluded from offline data for HC275 whilst for AMS it is possible to configure it offline.

Test Display

Display Firmware

(2.4.2) are not supported by the HART® interface. Besides, the complete

(2.1.2 – tests the HW

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Remote Operation Instructions BM 70 A/P, BM 700, BM 702 HART

due to any reason (say, for testing purposes) wants these units to be same, he can either “equalize” them from
remote (
configuration tab for AMS) or from the device keypad (functions 3.2.2/3.2.3).

Configuration/Test ➪

Installation ➪

Display ➪ Unit length/Unit conversion

for HC275 or “

Process Input

4 HART Communicator 275 (HC275)

4.1 Installation

The HC275 has to be programmed with the BM 70 A/P /700 /702 HART Device Description. Otherwise the HC275
user will work with the instrument as a generic one thus loosing opportunity for entire instrument control.

4.2 Operating

Refer to the BM 70 A/P /700 /702 Menu Tree HC275 (Attachment A).
The online help of each parameter contains its function number as a reference to the device’s local display and the
“Installation and Operating Instructions”.
Parameter protection via passwords (Entry Code, Service Code) is the same as on local display. Please refer to the
online help for valid symbols according to device’s keypad.
The BM 70 X operation via HC275 is made quite close to the manual instrument control via keypad. The differences
follows:

•

The instrument write protection (parameters “Entry Code 1”, “Code 1”, menu items 3.4.2, 3.4.3 of the

and Operation Instructions. BM 70 A/P, BM 700, BM 702”

(item 3 ➪ 1 of the HC275 Menu Tree).

•

To “open” service functionality the user has to register as specialist. To do this, one should invoke the “Service

Code” method (item 3 ➪ 2 of the HC275 Menu Tree) and enter the correct service password. After the HC275 is
switched off (or the same method is invoked with improper service password) specialist authorization is lost, and
all service parameters/functions (trim PV current DAC zero/gain) again become inaccessible.

•

For additional details refer to the

Transmitter-Specific Command Specification“.

While saving “Standard” configuration to HC275 from connected instrument, some crucial service variables (refer to
section 3) are also stored. Hence in the offline mode their values cannot be changed (and will not be sent to device),
but are shown to HC275 user and control assignments for maintenance data.
In case “Full (for PC)” configuration is stored in Communicator, only the maintenance parameters (refer to section 3)
can be edited via HC275 in offline mode. However, when such configuration is changed offline (within the
maintenance part) and stored in Communicator, it is possible to transfer it (later on) complete (with service data!) to
AMS (excluding conversion table - refer to section 3).

“HART® Smart Communications Protocol. BM70 A/P /700 /702 Level Radar.

) is changed via invocation of “Entry Code” method

„Installation

”

4.3 Known HC275 (4.9) Shortcomings

•

When the “Save” operation is activated with the “Full (for PC)” data type chosen, HC275 loops forever attempting

to retrieve instrument Service Data. The loop can be avoided if the user has registered as specialist in advance.
With alternative data type (“Standard”) such preliminary registration is not necessary.

•

The same is true when the “Send” option is selected for “Full (for PC)” configuration. After such data “transfer” is

cancelled by disconnection of Communicator (no other way is possible), the preserved configuration might be
damaged (then the HC275 user is prompted ‘No configurations stored’ in case ‘twas the sole configuration in
Communicator).

5 Asset Management Solutions (AMS)

5.1 Installation

If the BM 70 A/P /700 /702 Device Description is not already installed on the AMS System a so called

BM 70 A/P /700 /702 HART AMS

Internet page).

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is needed (available on floppy disk from KROHNE or as download from KROHNE

Installation Kit

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Remote Operation Instructions BM 70 A/P, BM 700, BM 702 HART

For installing the DD with the Installation Kit refer to the

“Adding new Device Types to AMS”

“Install Device Types Manually”

/

“AMS User's Guide”

.

section 3:

”Managing HART Devices”

/

5.2 Operating

Refer to the BM70 A/P /700 /702 Menu Tree AMS (Attachment B).
Due to AMS requirements and conventions the BM 70 X operation differs a little from operation with HC275 and via
local keypad.
The online help of each parameter contains its function number as a reference to the device’s local display and the
“Installation and Operating Instructions”.
Parameter protection via passwords (Entry Code, Service Code) is the same as on local display. Please refer to the
online help for valid symbols according to device’s keypad.

Some additional comments follow:

•

To “open” service functionality the user has to register as specialist. To do this, one should invoke the

Code”

method from the

Connection View

is reopen (or the same method is invoked with improper service password) specialist

Device Context Menu

and enter the correct service password. Note, that after the

authorization is lost, and all service parameters/functions (trim PV current DAC zero/gain) again become
inaccessible.

•

Opposed to the HC275, handling of Conversion Table via AMS is carried out directly from the three configuration

displays. Due to transmitter implementation peculiarities some steps should be sequentially undertaken to create
or change the table. The matter is that all the changes in table elements are initially accumulated in instrument
RAM. The trigger event that launches the table’s burning into EEPROM, is Command #141 (Write Conversion
Table Point Number) that deals with a single parameter, being the ‘
display “

Strap Table, 1-20

”). Just this command initiates the check of complete table and in case ‘twas successful

Number of points

’ variable (configuration

– activates the burning procedure. Worth noting that as soon as every table point depends on the ‘

points

’ variable (in terms of VALIDITY clause), the latter is always written to instrument before the points’ set.
Hence while augmenting table the user can be prompted “Error ‘Table not monotonous’ happened writing
‘Number of points’”. Only after this response the table (changed elements) is copied to the instrument RAM. To
burn it into EEPROM one have to “change” again the number (say, 10 to 10, or 4 to 4) and press ‘Apply’ again.
All the commentaries above can be summarized as follows:

1. If the number of points is changed (with or without changes of the table contents), the user should ignore
the first possible error response after pressing ‘Apply’ (‘Table not monotonous’ happened writing ‘Number of
points’), “change” the number of points again to desirable one (i.e. reenter exactly the same value) and again
press ‘Apply’.

2. If the number of points is preserved but some table items are changed, the user should press ‘Apply’ (thus
transferring changed items to device), then reenter the number of points (as above) and press ‘Apply’ again ­otherwise the updated point(s) will be “in play” until the first power reset.

•

While transferring configurations (various transfer types are possible here - between live instruments; some

stored configuration and live device; two offline configurations – say, between HC275 and AMS; etc.) one should
bear in mind that the ‘Transfer the device configuration’ buttons on the reconcile views (the “<<”, “>>” buttons to
the left of “OK”-button) are available only in case the devices/configurations are in one and the same transmitter
mode (refer to Attachment C). Otherwise the buttons are grayed and display the mode of corresponding
configuration (say, “/0”, “/6” will imply that the left-hand configuration was stored (or corresponds to connected
instrument) when device was in ‘0’ mode whilst the right-hand – in ‘6’th. In case of different configurations’ modes
only partial transfer is possible when the accessible (not grayed) parameters are transferred individually. Worth
noting that “relocatable” parameter set depends on how severe corresponding modes differ. Moreover – the
mode-driven restrictions might have some intermediate/secondary effect: say, transfer of enumerator of some
“wide” configuration (e.g. any corresponding to BM 70 A) to a “narrow” one (e.g. any of BM 702) can lead to a so­called ‘Unknown enumerator’ situation (when transferred value is replaced with ‘**********’ in configuration­“receiver” due to restrictions of any kind – e.g. “Agitator” setting for ‘

Tank type’

is possible only for BM 70 A but
not for any other device type/modes). Such wrong enumerators will be (for sure) rejected being applied to a live
instrument (i.e. when configuration-receiver is connected device), but are accepted by some preserved
configuration (in

User Configurations

view, etc.). Hence it is recommended for the user to use the online help for

every transferred parameter in case the two configurations represent different transmitter modes!

•

The Dynamic Variables mapping (to the sole/primary current output and the three logical slots) can be controlled

for this revision from the

“Device/HART”

configuration tab. One note should be mentioned here: when the

“Service

Device

Number of

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Remote Operation Instructions BM 70 A/P, BM 700, BM 702 HART

instrument is in multidrop, changing of the
digital value (and corresponding settings) whilst the current output function (

‘PV is’

value (Primary Variable code) affects only Primary Variable

‘Function I’

on the

“Analog Output”

tab) remains switched “Off”. Otherwise - when the instrument has the ‘0’ bus address – changes in Primary
Variable assignment are traced at analog output and its function. And vise versa – when the

‘Function I’

parameter is changed, Primary Variable code is correspondingly changed. The only exclusion here is when the

‘Function I’

is set to “Off” – then the last meaningful assignment for PV (process variable or status data) is

retained.

5.3 Known AMS (5.0) Shortcomings

There are several insignificant shortcomings (all having workarounds) found during trials with AMS. Some of them
pertained also to the previous AMS versions, one (last mentioned) is new.

•

Losing of the “Service Code”. If after registration as specialist (refer to section 4.2), the user does not open the

“Configuration Properties”

the correct service code), and the user will have to undertake the same actions (4.2) to re-establish access
rights. In case if any window is already open before the
happen.

•

Getting/releasing specialist access initiates a re-read process of the Service data package. And if the service

access rights are being changed when the
“Error reading <parameter label>: Wrong service password” for every service parameter available on the tab
(number depends on device implementation and some additional mutual parameters’ dependencies). No boring
messages are presented to the user, if any other window (except

•

In case the instrument mode is changed (say,

does not reflect/trace the new mode (opposed to configuration tabs) and must be closed/reopen.

“Process Variables”

or

window, AMS will lose soon access to service functionality (i.e.

“Service”

configuration tab is active, the user is get prompted with the

Conversion Table

“Service Code”

method is invoked, such loss doesn’t

“Service”

configuration tab) is active.

is removed), the faceplate (in case it was open)

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Attachment A

g

1 Process
Variables

2 Configuration
Menu

3 Access
Rights

4 View Erros/
Warns

5 HART
Variables

Met

Remote Operation Instructions BM 70 A/P, BM 700, BM 702 HART

BM 70 A/P /700 /702 Menu Tree HC275

1 Measurements

2 Input/Outputs

1 Test

2 Installation

3 Service

1 Signal Control

2 General

3 Current
Output I

4 User Data

1 Entry Code
2 Service Code

1 Tag
2 Manufacturer Id
3 Model
4 Hardware rev
5 Software rev
6 Message
7 Descriptor
8 Date
9 Final assembly num
10 PV is
11 SV is
12 TV is
13 QV is
14 Num resp preams
15 Pollin

Met

Met

address

1 Level
2 Distance
3 Conversion
4 Reflection

Opt

1 PV current
2 PV percent of range
3 Relay state

Opt

1 Min Peak
2 OF Threshold
3 HP Filter
4 LP Filter
5 Sweep

Opt

Opt

6 Empty spec. type
7 Min Window

1 Offset
2 Corr. Factor
3 Max Tankheight
4 Fct digital input

1 I Calibrate 1
2 I Calibrate 2

Met
Met

1 Serial No
2 Option 1
3 Option 2

Opt

1 Hardware
2 Test I
3 SW Output S

Met

Met

Met

4 Master Firmware

1 Basis
Parameters

2 Display

3 Signal Output

4 User Data

5 Application

6 Relay
Output R

7 Conversion
Table

1 Interface Option
2 Firmware version
3 Firmware ident.nr.

1 Tank height
2 Block distance
3 Antenna
4 Antenna extension
5 Distance piece
6 Stillwell
7 ID Stillwell
8 Reference offset
9 Tank bottom offset

1 Unit length
2 Length format
3 Unit conversion
4 Convers. format

Loc

Loc

1 Function I
2 Range I
3 Scale 20 mA
4 Scale 4 mA
5 Baudrate
6 Protocol

1 Tag

1 Auto tankheight
2 Empty spectrum

Met

Met

3 Time constant
4 Tracing velocity
5 Mult. reflections
6 BD Detect
7 Function FTB
8 Epsilon R
9 Tank type

1 Function R
2 Type R
3 Threshold
4 Hysteresis

Opt

Opt

Opt

Opt

1 Level unit
2 Volume unit
3 Input table
4 Delete table

Met

Met

Designations:

Opt

– Optional item, depends on device implementation;

Loc

– Local HC275 variable, that is not read/written to instrument;

Met

– Method is invoked to retrieve/change data.

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KROHNE BM 70 A/P /700 /702 45f9 0b02

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Attachment B

y

Remote Operation Instructions BM 70 A/P, BM 700, BM 702 HART

BM 70 A/P /700 /702 Menu Tree AMS

• Level

• Distance

• Conversion

• Reflection

• Analog Output

• PV Percent of Range

• Rela

State

Opt

Opt

Process Variables
Status

Scan Device

-----------------------------------

Diagnostics and Test
Calibrate

----------------------------------­Master reset
Entry Code
Service Code

----------------------------------­Audit Trail
Drawing Notes ...
Help ...

----------------------------------­Clear Offline Configuration
Compare Configurations

Configuration Properties

Overview

• Primary variable out of limits

• Non-primary variable out of limits

• Primary variable analog output saturated

• Primary variable analog output fixed

• Cold start

• Configuration changed

• Field device malfunction

Critical

Hardware Failures

• CPU error

• ROM checksum error

Configuration Errors

• Calibration data error

• Configuration error

• RAM read/write error

• Interrupt Controller error

• Timer error

• EEPROM Error

Informational

Warnings

• Signal low

• Signal too strong

• Poor spectrum

• Sweep low

• Empty Spectrum bad

• Measured value old

Miscellaneous

• Tank bottom

• Measurement frozen

• Tank overfilled

• Relay in test mode

• Current set to error

• Relay set to error

Runtime/Measuring Errors

• Signal down

• No measurement value

• VCO error

Opt

Opt

Designations:

Opt

– Optional, depends on device implementation;

– refer to the next page.

KROHNE BM 70 A/P /700 /702 45f9 0b02

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Attachment B

g

(continued f rom the previous page)

Remote Operation Instructions BM 70 A/P, BM 700, BM 702 HART

BM 70 A/P /700 /702 Menu Tree AMS

Designations:

Opt

– Optional, depends on device implementation;

Rd

– Read-only variable;

Loc

– Local AMS variable, affects on l y AMS fac eplates and

confi

uration tabs and is not read/written from/to instrument.

Process Variables
Status

Scan Device

----------------------------------­Diagnostics and Test
Calibrate

----------------------------------­Master reset
Entry Code
Service Code

----------------------------------­Audit Trail
Drawing Notes ...
Help ...

----------------------------------­Clear Offline Configuration
Compare Configurations

Configuration Properties

Analog Output

• Function I

• Range I

• Scale 20 mA

• Scale 4 mA

Application

• Empty spectrum

• Time constant

• Tracing velocity

• Mult. Reflections

• BD Detect

• Function FTB

• Epsilon R

• Tank type

Hardware test
Loop test
Test relay

Basic Setup

• Model

Opt

Rd

• Tag

--------------------------------

• Tank height

• Tank type

• Block distance

• Antenna

• Antenna Extension

--------------------------------

• Time constant

--------------------------------

• Function I

• Scale 20 mA

• Scale 4 mA

--------------------------------

• Function S

Relay Output

• Function S

• Type S

• Threshold

• Hysteresis

Opt

Opt

Opt

Opt
Opt

Strap Table , 1-20

• Number of points

First 20 pairs
Level " Volume

Strap Table, 21-40

Next 20 pairs
Level " Volume

Strap Table, 41-50

Last 10 pairs
Level " Volume

Calibration Management

----------------------------------­D/A low trim
D/A high trim
Apply values

----------------------------------­Autodetect tank height
Record tank empty spectrum

Basis Parameters

• Tank height

• Block distance

• Antenna

• Distance piece

--------------------------------

• Stillwell

• ID Stillwell

--------------------------------

• Reference offset

• Tank bottom offset

Device/HART

• Model

• Manufacturer

• Field device revision

• Software revision

• Hardware revision

• Firmware version

• Firmware ident.nr.

• Write protect

Rd

Rd

Rd

Rd

Rd

Rd

Rd

Rd

--------------------------------

• Tag

• Polling address

• Device ID

• Universal revision

• Num request preams

Rd

Rd

Rd

• Num response preams

• Final asmby num

• Date

• Descriptor

• Message

--------------------------------

• PV is

• SV is

• TV is

•

Process Input

--Measurements/Cfg data--

• Length unit

• Length fo rmat

• Conversion unit

• Conversion format

Loc

Loc

----- Strap Table ------------

• Level unit

• Level format

• Volume unit

• Volume format

Loc

Loc

---------------------------------

• Time constant

Service

• Min Peak

• OF Threshold

• HP Filter

• LP Filter

• Sweep

Opt

Opt

• Empty spect. Type

• Min Window

--------------------------------

• Offset

• Corr. Factor

• Max Tankheight

• Fct digital input

Opt

--------------------------------

• Serial No

• Option 1

• Option 2

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Attachment C

Remote Operation Instructions BM 70 A/P, BM 700, BM 702 HART

AMS Transmitter Modes

AMS device mode
number

Hardware Setting of “PV is”

(Primary Variable code)

“Number of Points”

(in conversion table)
0 BM70 A, BM70 P any, except “SW Output S” > 1
1 BM70 A, BM70 P only “SW Output S” > 1
2 BM70 A, BM70 P any, except “SW Output S” < 2
3 BM70 A, BM70 P only “SW Output S” < 2
4 BM700, BM 702 Any > 1
6 BM700, BM 702 Any < 2

NOTE: modes with indices 5 and 7 are never used/invoked for 0x0b02 revision and are therefore excluded from
the table.

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