KROHNE IFC 090, Supplementary Installation & Operation Instructions

Page: 30 / 44

Supplementary Documentation Page 30 of 44
IFC090, IFC090 i with FF
IFC090-FF Configuration
IFC090 FF 01/2005
KROHNE Messtechnik GmbH & Co. KG · Ludwig-Krohne-Str. 5
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D-47058 Duisburg
Tel.: 0203-301 309
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Fax: 0203-301389 · E-mail: krohne@krohne.de
Since most of the Transducer Block parameters are depending on device settings which are configurable over
the device’s display only, there are not many what the user has to configure.
5.2.1 Transducer Block Mode Handling
As in other blocks the mode handling in the Transducer Blocks can be controlled by the parameter MODE_BLK.
The Transducer Block supports the following modes:
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Automatic (AUTO),
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Manual (MAN), and
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Out of Service (OOS)
In Automatic mode, the Transducer operates in its standard way and delivers its measurement value and status
as parameter PRIMARY_VALUE via channel 1 to the Function Blocks4 (if any).
Different from the Automatic mode, in Manual mode the Transducer Block freezes its measurement value and
sets its status to Uncertain:NonSpecific Constant.
To stop the complete operation of the Transducer Block, set its mode to Out of Service. In this mode, the
Transducer Block freezes its measurement value to the last one obtained in Automatic mode and sets its status
to BAD:OutOfService:NonSpecific.
If the block is in Out of Service mode, this is also indicated by its BLOCK_ERR parameter.
5.2.2 IFC090-FF Zero Point Calibration
The Transducer Block allows a calibration of the devices zero point.
To do this, the number of calibration cycles has to be specified first by setting parameter
CYCLES_ZEROPOINT_CAL (default value is 250).
To start the zero point calibration, parameter CAL_ZEROPOINT has to be set to a value different to zero (0).
5.3 Analog Input Block Configuration
The Analog Input block is one of the 3 Function Blocks supported by the IFC090-FF. It can be used to process
the measurement value obtained from the Transducer Block in a user defined way and to deliver it to the control
system. To this end, there are some parameters in the Analog Input Block, that can be configured to get a
measurement value quality as desired by the user.
Analog Input Block Mode Handling
By selecting the operation mode in parameter MODE_BLK, the operator is able to control the activities of the
Analog Input block. The following lists the available modes and meanings:
4
Normally, this is the Analog Input block, but it has to be configured to process the channel value.