61
73ET/74ET/75ET USERS MANUAL EM-7353-0003B Rev.5
8.
FILE
8.1
7xET FILES
Files required to store the 7xET data are created automatically when the 7xET gets started. Table 8.1a below shows
the types of files.
Table 8.1a: File type.
CAUTION !
When you delete the data file in a CF Card, delete also the control file. In any event do not modify the control file. A
modified control file may destroy the data file.
WARNING !
Be sure to restart the 7xET before using a data file created by the 7xETBLD configurator software. If not, the data file
will be destroyed.
DATA FILE
All 7xET data are stored in binary in single data file named ‘7xET.7xDA.’
An empty data file is already created at the startup of the 7xET using all available space. Once data recording starts,
sampled data are stored in this file. It means that the data file size is fixed regardless of the data volume in it. In
order to confirm data recording, open the file in Retrieve view.
All data are stored in a single file even if multiple sets of data are recorded within a day, or if single or multiple data
are recorded over multiple days. Trigger data are stored also in the same principle. Therefore the user must be
aware that some data may be overwritten by another of different configuration settings if you keep recording after
setting new configuration.
The data file is cyclic: data in the CF Card will be overwritten when the file is full. Watch the data volume using Data
File Used Volume bargraph in the Overview, or calculating approximate time before the file is full. Refer to Section
8.2.
ALARM HISTORY FILE
Alarm history is stored in binary in single data file named ‘7xET.7xAA.’ Analog alarm events and discrete signal
status changes (regardless of alarm setting) are recorded in this file.
Like the data file, an empty alarm history file is already created at the startup of the 7xET. The file size is fixed
regardless of the data volume in it.
Number of events stored in this file depends upon the CF card capacity. Refer to Table 8.1b.
Table 8.1b: CF card capacity v.s. alarm event numbers.
The alarm history file is cyclic: data in the CF Card will be overwritten when the file is full.
CONTROL FILE
The control file contains the information to manage the data file. It is used to convert the file into .MRD format on the
MSR128 program or into .CSV format on the 7xETBLD.
If this file is deleted, the data file is initialized. When storing the data file in the PC’s hard disk, store also the control
file.
FILE TYPE
CONTENTS
FILE NAME
EXT
7xET Data File
Data sampled by the 7xET
Fixed (7xET)
7xDA
7xET Alarm History File
Alarm history data
Fixed (7xET)
7xAA
7xET Control File
Record pointer for 7xET.7xDA
Fixed (7xET)
7xCA
7xET Parameter File
Parameter settings such as node and operation
Fixed (7xET)
7xPA
mode, pen configuration
CF CARD CAPACITY
ALARM EVENT NUMBERS
128 MB
250
256 MB
500
512 MB
1000
Содержание 75ET
Страница 24: ...20 7xETBLD USERS MANUAL EM 7353 0003C...