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NV021 - Manual - 08 - 2012
MEASURES, LOGIC STATES AND COUNTERS
By means of the following formula the record quantity may be evaluated:
where:
N
: record quantity
v
i
: sampled measures
v
RMS
: analog measures (RMS)
n
B
: logic variables
t
pre
: pre-trigger time interval
t
post
: post-trigger time interval
f
: frequency
Example 1
With the following setting:
Pre-trigger:
0.5
s
Post-trigger:
0.5 s
Sampled measures:
u
L1
,
u
L2
,
u
L3
Analog measures:
U
L1
,
U
L2
,
U
L3
Logic variables:
K1, K2, K3, K4, K5, K6, IN1, IN2
305 record can be stored if f = 50 Hz, since:
Example 2
With following setting:
Pre-trigger:
0.5
s
Post-trigger:
0.5 s
Sampled data:
u
L1
,
u
L2
,
u
L3
Analog measures:
U
L1
,
U
L2
,
U
L3
Digital channels:
K1, K2, K3, K4, K5, K6, IN1, IN2
up to 254 records can be stored if f = 60 Hz, since:
•
•
•
•
•
•
•
•
•
•
N
= int
·
24 + 24
v
i
+ 4
v
RMS
+
n
B
600
(
t
pre
+
t
post
)(s)
59 s
·
f
(Hz)
50 (Hz)
N
= int
·
24 + 24
v
i
+ 4
v
RMS
+
n
B
600
(
t
pre
+
t
post
)(s)
59 s
·
f
(Hz)
50 (Hz)
N
= int
= 305
·
24 + 24 · 3 + 4 · 3 + 8
600
(0.5 + 0.5 )(s)
59 s
·
50 (Hz)
50 (Hz)
N
= int
= 305
·
24 + 24 · 3 + 4 · 3 + 8
600
(0.5 + 0.5 )(s)
59 s
·
50 (Hz)
50 (Hz)
N
= int
= 254
·
24 + 24 · 3 + 4 · 3 + 8
600
(0.5 + 0.5 )(s)
59 s
·
60 (Hz)
50 (Hz)
N
= int
= 254
·
24 + 24 · 3 + 4 · 3 + 8
600
(0.5 + 0.5 )(s)
59 s
·
60 (Hz)
50 (Hz)
