Section 3 Parameter Interface
Parameters for Alarm Handling
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The
reverse
attribute can be used for components in the data types used in
communication variables for point-to-point communication. If there is any reverse
component in a communication variable, it is communicated from
out
backwards to
in
(opposite direction to the normal data flow). This also implies that it is only
allowed to communicate one-to-one (an
out
communication variable can be
connected to only one
in
communication variable if the data type with the
reverse
component is used).
Handling Communication Failure using ISP Value
The data type editor contains the column to define an ISP value to each component.
These ISP values will be used in case of communication failure.
The rest of the components, which do not have any ISP values, will keep the
existing value.
For safe communication using IAC in a SIL application ISP value must be defined
for all components in a data type and for safe MMS it is on the user responsibility to
arrange for safe values if the communication is broken.
Parameters for Alarm Handling
The alarm handling in object should be unified with possibility to assign class,
severity, condition name, alarm and event configuration, as well as possibility to
inhibit and disable alarms. Therefore, a number of parameters defined in
, have been reserved for this purpose.
Monitoring Continuous Execution
The parameters used for control of continuous functionality (for example, level
monitoring) are described in
. All of these parameters need not be defined at
all times. If
Error
or
Warning
is defined,
Status
must also exist. If
Error
and
Warning
occur simultaneously, the error status code shall be given in
Status
.
For function block types,
Error
and
Warning
only last for one invocation. For
control module types, Error and Warning are active for as long as the invocation
lasts.
Add a suffix (for example, EnableReport, ErrorReport) in case of several activation
signals.
Summary of Contents for AC 800M
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Page 3: ...AC 800M Library Object Style Guide System Version 6 0...
Page 12: ...Related Documentation About This User Manual 12 3BSE042835 600...
Page 18: ...Naming Convention Section 1 Libraries 18 3BSE042835 600...
Page 108: ...SIL Mark Restrictions Section 6 Program Code Issues 108 3BSE042835 600...
Page 116: ...Standard Library Parameters Appendix A Names and Abbreviations 116 3BSE042835 600...
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