Station Function Blocks; Configs - Configurations Library - Siemens 353 User Manual

Function Blocks
engineering units of the Process is changed. For example, if AIN1 is rescaled from the default of 0-100 to
0-5000, the 0-100% bargraph on the display will now represent 0-5000 when displaying the process. The
A/M block, AOUT1 (Valve) output, and the Valve input of the ODC block are scaled based on the output
of the PID block.
•
FCO104 External-Set PID controller – The external setpoint is displayed as variable X in the ODC block.
Therefore, the ODC (RX) input uses the range output of the external setpoint AIN2 (OR) for scaling. The
0-100% bargraph will represent the range of AIN1 when displaying the process variable and the range of
AIN2 when displaying the X variable.
•
FCO105 Ratio Set Control – AIN1 and AIN2 are scaled 0-100% of flow. The ratio of these flows is
displayed on variable Y and the scaler function block is used to define the engineering units as a
dimensionless ratio CF/WF scaled from 0.50 –1.50.
Connections between blocks are allowed only with similar data types.
To help you quickly locate a function block:
•
In this section, function blocks are listed alphabetically by the block ID (e.g. AIN for Analog Input).
•
In Section 2, function blocks are listed by broad function (e.g. station hardware I/O).

3.1 STATION FUNCTION BLOCKS

Station function blocks include stored configurations such as FCOs, security, clock setup, Ethernet settings, and
station parameters. Each is described in the following subsections.
3.1.1 CONFIGS – Configurations Library
The CONFIGS function block provides a selection of
applications either stored in the controller memory as
FCOs or stored on a plug-in MMC memory card.
An FCO can be selected from the library and loaded
as a complete controller configuration, as defined by
the FCO documentation (see Section 4). This erases
the current configuration in the controller. Station
parameters (STATN, SECUR, ETHERNET blocks)
and Calibration are retained when a new FCO or a
configuration from an MMC is loaded. This enables a
user to quickly configure the controller without
having to re-calibrate or re-enter the Station parameter
values. The Time and Date in the CLOCK block are
retained and the SRCE ADD (Source Address) is reset
to 0.
Upon stepping down to the FCO parameter, the last FCO that was loaded in the controller will be displayed.
Turning the pulser knob will then display other FCOs that are available in the FCO library. The configuration
installed at the factory will be either FCO 101 or a custom configuration that was ordered and defined by the user.
FCO 101 is a basic single loop PID controller. An FCO can be loaded at any time in the field and used as is or
modified (edited) to meet individual requirements. The FCO library file is not modified when the FCO selected for
controller configuration is edited.
In a similar manner a configuration on the MultiMediaCard can be loaded as a complete controller configuration.
Controller configurations can be stored on the MMC either in folders or in the card root directory. Pressing ENTER
at the controller faceplate and stepping down until MMC appears in the alphanumeric display will provide access to
the folders and files stored on the card; see the MultiMediaCard Roadmap, Figure 2-2. If a file name is displayed,
stepping down will display either a load or save option. File names and folder names are limited to 8 characters.
3-2
CONFIGS
CONFIGS
FCO Library
MMC
Card
UM353-1B
April 2012