SIEMENS
4/7
Siemens ST PCS 7 · 2017 (Preliminary edition)
4
■
Function
(continued)
Engineering System
ES Software
Standard Engineering Software
I&C and process messages are already pre-configured in the
function blocks, and operator input messages are already pre-
configured in the faceplates. These are automatically generated
when the triggering event occurs. If required, message texts can
be modified or message priorities defined.
Using the process object view, "Smart Alarm Hiding" can also be
configured. This refers to the dynamic hiding of alarms that are
of secondary importance to the safe and interference-free oper-
ation of the plant under certain plant conditions. Depending on
the operating status of a plant unit (startup, service etc.), mes-
sages of the technological blocks grouped in this plant unit are
shown or hidden in accordance with the previously set configu-
ration. Alarms can be displayed or hidden separately for each of
the maximum 32 operating states through selection of option
boxes in the alarm matrix of the process object view. Although
hidden alarms are not signaled visually and audibly, they are still
logged and archived as before.
Continuous function chart
Continuous function chart (CFC)
The CFC editor permits graphic configuration of the continuous
automation functions. In addition to convenient editing functions,
its scope of functions also includes powerful test and commis-
sioning functions as well as individually configurable documen-
tation functions.
When creating a new CFC, a new runtime group with the same
name as the chart is created. All the blocks that are subse-
quently entered in the chart are automatically added to this run-
time group. Each block is therefore already assigned runtime
properties when it is inserted, and configuration engineers can
optimize these properties by means of modifications in the run-
time editor or by using algorithms.
The algorithm first determines the optimum block sequence sep-
arately for each runtime group, and then the optimum sequence
of runtime groups.
Instances of function block types can be positioned on CFCs,
assigned parameters, and interconnected. Operator privilege
levels can already be defined at block level for each block attri-
bute so that finely granular operator privileges can be imple-
mented.
Additional potential for rationalization is offered by special con-
figuration techniques such as chart-in-chart for implementing hi-
erarchical charts, or the multiple use of chart block types (indi-
vidual control unit types and process tag types) or SFC types
(standardized sequence controls) in the form of instances.
The CFC editor supports the following types of standardized
software modules:
•
Function block type
The function block types supplied with I&C libraries are used
for I&C modeling of engineering equipment such as valves or
motors. The smallest standardized software modules for
multiple usage have connections for actuating and control
signals and for parameter assignment and monitoring
functions. Some also contain interlocking functions for
automatic transition to defined safety settings.
•
Process tag type
Process tag types implemented with function blocks each
represent a standardized CFC for the basic automation of
specific I&C functions, e.g. for a level controller. Their
instances can be modified centrally by the type-instance
concept, and also manually adapted and linked.
•
Control module type
The control module type (CMT) marks a new type of
standardized software module that offers even more efficient
engineering than classic process tag types. A CMT can
contain blocks, charts, control variables (block I/Os such as
signals and parameters) and messages.
Note
: As the function "Control module adjustment" is based on
a basic functionality of the Version Cross Manager (VXM), you
need a VXM license to use this function
, see page 4/13
. In the
absence of a license, a message appears telling you to install
Version Cross Manager. This is not actually necessary, all you
need to install is a valid VXM license that will enable the
relevant functionality on the engineering station.
Note:
The CFC is not just a component in the standard engineering
software of the SIMATIC PCS 7 process control system. As a
separate product, it can also be used together with other
SIMATIC products in the context of Totally Integrated Automation
(TIA). This SIMATIC CFC is a component from catalog ST 70,
"SIMATIC Software" (article number of the current SIMATIC CFC
V9.0, goods delivery: 6ES7658-1EX58-0YA5; online delivery:
6ES7658-1EX58-0YH5).
© Siemens AG 2017