Endress+Hauser RID16, Руководство по эксплуатации

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RID16 Operating the field indicator
Hauser 23
In the case of sensors these are typically the following blocks:
• ’Analog Input’ or
• ’Discrete Input’ (digital input)
Actuating valves normally have the function blocks:
• ’Analog Output’ or
• ’Discrete Output’ (digital output)
For control tasks there are the blocks:
• PD controller or
• PID controller
More information on this can be found from Section 11 onwards.
In the field indicator, the following function blocks are available:
• Input selector
• PID
• Integrator
• Arithmetic
5.3.6 Fieldbus based process control
With the FOUNDATION Fieldbus™ field devices can carry out simple process control functions
themselves, thereby relieving pressure on the superior process control system. Here the Link Active
Scheduler (LAS) coordinates data exchange between the sensor and controller and makes sure that
two field devices cannot access the bus at the same time. To do this, configuration software such as
the NI-FBUS Configurator from National Instruments is used to connect the various function blocks
to the desired control strategy – generally graphically (
→
ä
27).
5.3.7 Device description
For commissioning, diagnosis and configuration, make sure that process control systems or superior
configuration systems can access all device data and that the operating structure is uniform.
The device-specific information required for this is stored as so-called device description data in
special files (the ’Device Description’- DD). This enables the device data to be interpreted and
shown via the configuration program. The DD is thus a kind of ’device driver’.
On the other hand, a CFF file (CFF = Common File Format) is required for the network
configuration in the OFF-line mode.
These files can be acquired as follows:
– Free of charge via the Internet: www.endress.com
– Via the Fieldbus Foundation Organization: www.fieldbus.org
5.4 Configuration of the indicator and FF
functions
The FF communication system will only function properly if correctly configured. You can obtain
special configuration and operating programs from various manufacturers for the configuration.
These can be used for configuring both the FF functions and all of the device-specific parameters.
The predefined function blocks allow uniform access to all the network and fieldbus device data.
Process control systems Asset management systems
Hauser ControlCare National Instruments NI-Configurator (
≥
3.1.1)
Emerson DeltaV Emerson AMS and Handheld FC375
Rockwell Control Logix/FFLD
Honeywell PKS Experion
Yokogawa Centum CS3000