100 Rockwell Automation Publication 1444-UM001D-EN-P - June 2018
Chapter 3 Configure the 1444 Dynamic Measurement Module
Alarm Status
Alignment
The module output (controller input) Status Assembly includes an array of 13 Alarm
Status records. Each record provides the status of a Voted Alarm. This control
determines how this array associates with the Voted Alarms.
Dynamic:
If set to Dynamic, the Alarm Status records are allocated based on relays.
Choose Dynamic Association if multiple relays are assigned to the same voted
alarm, but for different outputs (alert, danger, transducer fault).
Static:
Static association allocates Alarm Status records to Voted Alarms in sequence.
AlarmStatus[0] presents the status of VotedAlarm[0], AlarmStatus[1] presents the
status of VotedAlarm[1], and so on.
Choose Static Association if relays are not used, or is always assigned to unique
Voted Alarms, and the application requires Voted Alarms to be routinely added
(enabled) or removed (disabled).
When Alarm Status Alignment is static each voted alarm can have just one output,
“Alarm Status to Activate On” defined (Alert, Danger, Transducer Fault). If multiple
statuses are selected for any Voted Alarm, the control is set to Dynamic and
disabled.
See Alarm System Overview
on page 211 and Alarm Status Structure on page 277 for
further detail and examples of Alarm Status alignment.
Compliance
Requirement
For general monitoring applications that do not apply protection requirement, select
“None”.
Select API-670 Compliant or higher to apply restrictions to the configuration that help
to define an API-670 machinery Protection Systems standard-compliant
configuration.
• The API-670 standard allows a great deal of variation in many aspects of the
configuration. So setting this attribute to API-670 Compliant or higher does not by
itself help to make sure that a configuration is API-670 compliant. API -670
compliance levels require real-time measurements. So the multiplexed
personalities are not enabled when compliance levels greater than None are
selected.
When the Compliance Requirement is set to API-670, the
ProtectionLoopTimeWarning status is considered in the ModuleSummary status. The
ProtectionLoopTimeWarning status bit is set when DSP critical alarms loop cycle time
is >100 milliseconds, which means that the module cannot satisfy the performance
requirements of API-670.
Table 15 - Module Functionality
Parameter Values Comment
Setting Alignment Mode
Dynamic 0
Static 1
Setting Compliance Mode
None 0
API-670 Compliant 1
To Next Page
Loading...
Need help?
General