Specifications

8 – Configuring Points
192 R400
System Sinewave
The System Sinewave is a useful indicator of the system scanning load. If the
Sinewave is not smooth, or has missing or repeated values, this indicates the
system may be overloaded.
If you are signed on to Station at the MNGR security level, you can set the low
and high values and the period.
A point can reference the current System Sinewave value if its source address is
F:8 R:1 W:114 b:0 W:15.
Cycles
Behind
Indicates that the length of time since the last scan is greater than the scan
period. Cycles behind is only valid while the current cycle is behind.
When the next cycle starts, this entry will be reset to zero.
Requests
Lost
This column displays the number of requests lost. A lost request is when
an entry cannot be queued into the data acquisition or control queue
because of an overload condition.
Note: The server should be 0 cycles behind and should not have
discarded (lost) any requests.
Scan Table
Pointers
These three columns analyze the contents of the table that holds all scan
entries. This table is built during point building and can be viewed using
the
lisscn utility.
Within the table, scan periods have been entered consecutively and
within each scan period there is an entry for each scan packet for that
period. This information is used by Honeywell.
first
The table record which is the first for that period.
number
The number of records belonging to that period. The number of scan
packets per period.
current
The record within that period that was last processed.
Property Description
plscpcg.book Page 192 Monday, May 28, 2001 10:11 AM