Micromod Micro-PWC: 53PW6000 MicroPWC Configuration Guide - Manual (Page 338)

Micro-PWC CONFIGURATION GUIDE
318 @aGlance/IT Server Interface
11.5 Monitoring
Monitoring provides a means whereby an @aGlance/IT client is advised regarding the values contained in
specified data points. The @aGlance/IT server supported on the Micro-PWC is based on polled interval
data collection. That is, the data points specified by the client are polled at specific time intervals and the
values in the data points are returned to the client.
The request for monitoring is made by the @aGlance/IT client. A typical client is the Excel spreadsheet,
with the @aGlance/IT Add-in for Excel installed. This manual assumes that the user is familiar with Excel
and @aGlance/IT for Excel. It is beyond the scope of this manual to document the use of these products.
Consult the product documentation for details.
11.5.1 Monitor Time Interval
The time interval at which the data points are polled is referred to as the poll interval. The default poll inter-
val used by the @aGlance/IT server supported on the Micro-PWC is five seconds. This means that an
@aGlance/IT client that has requested the monitor feature would be updated every five seconds. To
change the default time interval, edit the aag_start shell script (discussed in
Section 11.2.4.1, Starting a
Server with Non-Default Options ). Revise the desired entry (or entries) in the aag_start shell script to
include the -i (interval) flag and an integer argument specifying the number of seconds in the interval. (The
minimum number of seconds is one and the maximum is 86,399, the number of seconds in one day, minus
one second.)
Refer to Section 11.2.4.1, Starting a Server with Non-Default Options for more information on starting a
server with nondefault options.
A client can specify a different time interval using an optional server command line argument to override
the default. To do so, the client must supply an ASCII text string to the interval parameter of the
AAG_monitor facility. The string, which will ultimately be passed to the Micro-PWC software, must be in the
following format:
DD:HH:MM:SS | DAILY | WEEKLY | MONTHLY, HH:MM:SS DD-MMM-YY
The poll interval is defined first; the words daily, weekly and monthly are valid entries to define the poll
interval. A customized poll interval is created by defining the number of days, hours, minutes and seconds
in the poll interval using the following format:
DD:HH:MM:SS
The poll interval can be followed by a comma (,) or a space and an optional starting time. The default poll
interval of five seconds would appear as 00:00:00:05. After the poll interval has been defined, the starting
time (hours/minutes/seconds and day/month/year) is entered in the following format:
HH:MM:SS DD-MMM-YY
The 24 hour clock is used, and the default starting time is midnight of the current day (e.g., 00:00:00 08-
JUN-07). Note that the month is identified by the first three letters of the month name, in English (i.e., JAN,
FEB, MAR, APR, MAY, JUN, JUL, AUG, SEP, OCT, NOV, DEC).
If the time specifying string cannot be processed, the default monitor time interval will be used.
11.5.2 Monitor Types
Three types of monitoring are supported. These are:
• Polled monitoring
• Deadband-absolute monitoring
• Deadband-percent monitoring