Yokogawa PC-Based MX100 - Manual (Page 93)

4-5
IM MX100-01E
Specification
3
2
1
4
5
Index
File name: MDDIXXXX.MXD
M: Month when saving started (local time), 1-9, X (October),
Y (November), Z (December)
DD: Data when saving started (local time), 1-31
I: Measurement interval number, 0-2, up to three types in
order from the shortest measurement interval
(if the measurement (monitoring) interval is the same
even when the measurement group is different, the data
are placed in a single file under the same measurement
interval number.))
XXXX: Sequence number 0000-9999
.MXD: Extension (upper-case characters) specific to the MX100
Guarantee of data during power failure:
Writing up to immediately before the power failure is guaranteed
(saving (backup) does not continue after the power failure
recovers).
Equation for calculating the size of the saved file:
Size of the saved file (bytes) = header size *1 + (data size *2 x write
count *3 )
*1 Header size = file information + channel information × number of
saved channels
File information: S1, S2: 416 [bytes], S3: 424 [bytes]
Channel Information: S1: 176 [bytes], S2: 184 [bytes], S3: 232 [bytes]
*2 Data size = 4 [bytes] x the number of saved channels x sample count
Sample count = Save interval [s]/measurement interval [s]
*3 Write count = ((5 [MB] - header size)/(data size)) or less
(truncated to an integer)
(Ex.) Measurement interval: 10 ms, number of measurement channels:
24 ch, style number S3
Header size = 424 [bytes] + 232 [bytes] × 24 = 5992 [bytes]
Data size = 4 [bytes] Ч 24 Ч (60 [s]/0.01 [s]) = 576000 [bytes]
Write count = (5 Ч 1024 Ч 1024 − 5992 [bytes])/576000 [bytes]
= 9.1 (= approx. 9)
Thus, the file size is:
(5992 [bytes]) + (576000 [bytes] × 9) = 5189992 [bytes]
Guideline of the sample time for the different CF card sizes (when one type of
measurement interval is used):
Number of
Saved CHs
Measurement
Interval
Capacity of the CF card
32 MB
(6 files)
64 MB
(12 files)
128 MB
(34 files)
256 MB
(49 files)
512 MB
(98 files)
1 GB
(196 files)
2 GB
(390 files)
10 CHs
10 ms 2.1 hours 4.2 hours 8.7 hours 17.5 hours 35.3 hours 2.9 days 5.9 days
50 ms 10.9 hours 21.8 hours 1.8 days 3.6 days 7.3 days 14 days 29 days
100 ms 21.8 hours 1.8 days 3.6 days 7.2 days 14 days 29 days 59 days
200 ms 1.8 days 3.6 days 7.2 days 14 days 29 days 59 days 118 days
500 ms 4.5 days 9 days 18 days 36 days 73 days 147 days 295 days
1 s 9 days 18 days 36 days 72 days 147 days 295 days 591 days
2 s 18 days 36 days 72 days 145 days 294 days 591 days 1182 days
24 CHs
10 ms 54 min. 1.8 hours 3.6 hours 7.3 hours 14.7 hours 29.5 hours 2.4 days
50 ms 4.5 hours 9 hours 18 hours 1.5 days 3 days 6.1 days 12 days
100 ms 9 hours 18 hours 1.5 days 3 days 6.1 days 12 days 24 days
200 ms 18.1 hours 1.5 days 3 days 6.1 days 12 days 24 days 49 days
500 ms 1.8 days 3.7 days 7.5 days 15 days 30 days 61 days 122 days
1 s 3.7 days 7.5 days 15 days 30 days 61 days 123 days 246 days
2 s 7.5 days 15 days 30 days 60 days 122 days 246 days 492 days
60 CHs
10 ms 21 min. 42 min. 1.4 hours 2.9 hours 5.8 hours 11.7 hours 23.4 hours
50 ms 1.8 hours 3.6 hours 7.2 hours 14.7 hours 29.4 hours 2.4 days 4.9 days
100 ms 3.6 hours 7.2 hours 14.4 hours 29.4 hours 2.4 days 4.9 days 9.8 days
200 ms 7.2 hours 14.4 hours 28.8 hours 2.4 days 4.9 days 9.8 days 19 days
500 ms 18.1 hours 1.5 days 3 days 6 days 12 days 24 days 49 days
1 s 1.5 days 3 days 6 days 12 days 24 days 49 days 98 days
2 s 3 days 6 days 12 days 24 days 49 days 98 days 196 days
4.2 Main Module (MX100-E) Specifications