Function Blocks
ASYS Analog System Status Function Block
82 HC900 Hybrid Control Designer Function Block Reference Guide Revision 11
2/07
ASYS Analog System Status Function Block
Description
The Analog System Status Block (ASYS) is a function block and is part of the Alarm/Monitor category.
Function
The Analog System Status Block is a function block and is part of the Alarm/Monitor category.
It provides read access to controller status values including those related to the Analog execution
cycle. The output may be connected to function block inputs. The outputs may also be connected
to signal tags for operator interface monitoring. The ASYS System monitoring block is assigned
block number 1.
Power Noise Rejection Selection
When you click on the ASYS function block on a diagram, the "Controller System Parameters"
dialog box opens. The 50 or 60 Hz selection is used to establish the integration times for analog
to digital conversion. This is needed to prevent aliasing the line frequency when converting low
level signals such as thermocouples. In the United States, the line frequency is 60Hz.
Table 24 Analog system status block outputs
Output Description
CYCTIME Control Block Cycle Time in seconds
CYCMINS Control Block Cycle Time in minutes
NEWSTART
Newstart is ON for one full cycle of control block execution, following a New start of the system. For
example: starting after a change from program to run.
RESTART Restart is ON for one full cycle of control block execution, following power up.
ALM ACTIV Alarm Active is ON if any operator panel alarm is ON.
To Next Page
Loading...
