The IFC090 is a two-wire transmitter with 4...20mA current output and HART capability. Dependent on device
implementation it is available with active current output (‘Standard + HART’, ‘Modis-3’) or passive current output
(‘Standard + HART’, ‘Modis -1 ’, ‘Mo d is- 2’) .
General Characteristics of the IFC090 HART interface:
•
Multidrop Mode is supported
•
Burst Mode is not supported
Electrical connection: Refer to sections 2.1, 2.2, 2.6 of the “Installation and Operating Instructions Electromagnetic
flowmeters IFC 090 K/F” (KROHNE) – for ‘Standard + HART’ device implementation, and to sections 4-6 of the
“Information about IFC 090i (Modis-devices)” (KROHNE) – for ‘Modis’ instrument implementations.
There are two ways of using the HART communication:
a) As a point-to-point connection between the IFC090 and the HART master equipment. The instrument may be
equipped with either active or pass ive curr ent out put ( ‘Modis ’) or be conf igure d with des ir ed current output (‘Standard
+ HART’).
Point-to-Point Analog/Digital Mode
Primary Master
250 Ω
≥≥≥≥
Secondary Master
HART
Modem
HART
Analog
mA
4
20
4...20 mA
Terminal I
Terminal I
IFC090
Addr. 0
(active Current Output)
+
⊥
b) As a multipoint connection (multidrop) with up to 15 devices (IFC090 or other HART equipment) in parallel. The
instruments must be equipped (or configured) with passive current output.
The HART Device Descriptions described in this document have the following IDs and revision numbers:
Manufacturer ID:69 (0x45)
Device Type:244 (0xF4)
Device Revision:2
DD Revision:1
HART Universal Revision:5
HC 275 OS Revision:
AMS Version:
For information about Transmitter Revisions and related Device Descriptions refer to the KROHNE HART Device
List.
≥
≥
4.9
5.0
3 Implementation Peculiarities
Variables and functions/processes of the
layer. Still a subset of service parameters is transferred via bus (only reading is possible): it applies to variables that
control the limits, availability, etc. of maintenance data.
Service Menu
are not maintained by the instrument HART® application
4 HART Communicator 275 (HC275)
4.1 Installation
The HC275 has to be programmed with the IFC090 HART Device Description. Otherwise the HC275 user will work
with the instrument as a generic one thus loosing opportunity for entire instrument control.
Refer to the IFC090 Menu Tree HC275 (Attachment A).
The IFC090 operation via HC275 is made quite close to the manual instrument control via 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 password (Entry Code) is the same as on local display. Please refer to the online help for
valid symbols according to device’s keypad.
While saving configuration to HC275 from connected instrument, some crucial service variables (refer to section 2)
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.
As soon as service functionality is not available via HART transmitter, the difference between “standard
configuration” of HC275 and its “full configuration” consists in some read-only parameters (sensor limits, device
modules’ IDs, etc.) that are either transferred to AMS (“full configuration”) or are shown on AMS tabs as empty fields
(“standard configuration”).
5 Asset Management Solutions (AMS)
5.1 Installation
If the IFC090 Device Description is not already installed on the AMS System a so called
AMS
is needed (available on floppy disk from KROHNE or as download from KROHNE Internet page).
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:
Installation Kit IFC090 HART
”Managing HART Devices”
/
5.2 Operating
Refer to the IFC090 Menu Tree AMS (Attachment B).
Due to AMS requirements and conventions the IFC090 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 password (Entry Code) is the same as on local display. Please refer to the online help for
valid symbols according to device’s keypad.
9 Date
10 Final asmbly num
11 PV Sensor serial num
12 Num response preams
13 Polling address
Designations:
opt
– Optional item, depends on device implementation: availability of Binary Terminals B1/B2 and their assignment, etc.;
N* – Availability of the item depends on the assignment made for some previous item(s): say, cutoff values become
visible/editable only if ‘Cutoff Control’ parameter is set to “Yes”;
loc
– Local HC275 variable, that is not read/written to instrument;
(M) – Method is invoked to retrieve/change data.