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Buffer size calculation for the use of parameters and the alarm acknowledge function
The size of the primary storage can be calculated with the equations below.
A: Number of parameter words, B: Number of sampling times, C: Number of sampling words
A
Type
Sampling
Method
Alarm
Alarm Logging {(3 + A + 1
Time Order
Alarming
Alarm
Tracking
*1 The addition is performed when [
*2 The addition is performed when [
*3 The addition is performed when [
*4 The addition is performed when [
function] are checked.
*5 The addition is performed when [
*6 The addition is performed when [
Parameters] are checked.
Limitations
• A displayable alarm acknowledged time ranges from the time of alarm occurrence until the time
65,535 seconds (18 hours approximately) at the maximum elapse. If you press the acknowledge
switch after a lapse of 65,535 seconds or longer, the time to be displayed then is the occurrence
time plus 65,535 seconds.
• If there is an occurring alarm, for which the acknowledge switch is not pressed yet, and if
[Occurrence/Cancellation/Confirmation Time] has already been selected for [History Display], the
alarm reset and acknowledged times will be displayed as "-----" at the time of rebooting the V8 unit
or change to the Main Menu screen. Even if you press the acknowledge switch in this state, the
acknowledged time is not displayed.
C
B
Equation for capacity calculation
) × B} +C
*5
*1
} × C × 16
{(5 + A + 1
) + 1
*5
*2
) × B}
{(5 + A + 1
) + 1
*5
*2
+ {((6 + A + 1
) + 1
+ 2
*6
*4
Memorize initial value] is checked.
Acknowledge function] is checked.
Add Time Order Alarming] is checked.
Add Time Order Alarming] and also [
Record Parameters] is checked.
Add Time Order Alarming] and also [
9.2
Acknowledge Function
) × C × 16)} + (7 + C
)
*3
*1
Acknowledge
Record
9
9-17
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