Yokogawa Removable Chassis DX1000N - Manual (Page 31)

Explanation of the
Advanced Security Function
IM 04L41B01-05EN
1-25
1
2
3
Index
App
1.5 Audit Trail Function
Operation Log
The DX operations are recorded in the operation log in the order that they occurred. The
operation log is contained within the measured data file.
For information about the display, see section 2.3.
For information about the contents of the log, see appendix 1.
Recorded Operations
• Operations that affect the measured data, such as memory start and message writing
are recorded. Error messages are also recorded.
• Key operations, communication operations, remote-control operations (/R1 and /PM1
options), event-action operations, and automatic DX operations (error messages, etc.)
can be distinguished from each other.
• Operations that do not affect the measured data, such as screen switching and display
configuration changes, are not recorded.
For details, see appendix 1.
How the Operation Log Is Saved
• The DX can record up to 2000 operation log entries in its internal memory. When the
number of log entries exceeds 2000, the oldest log entries are overwritten.
• The log of the operations from the previous memory stop to the current memory stop
is stored in the measured data file (display or event data file). If the measured data file
is divided, each time a file is created, the operation log up to that point is saved in the
file.
• When you use the multi batch function (/BT2 option), all the batch groups share the
same operation log. The log entries from one memory stop to the next memory stop
are saved.
• You cannot just save the operation log in the internal memory to a CF card.
Viewing an Operation Log
• You can display the operation log in the internal memory on the DX screen.
• You can display the operation log in a measured data file on the DX screen or the
DAQSTANDARD Viewer application.
How to Clear the Operation Log
• The operation log in the internal memory is cleared when you initialize the settings in
basic setting mode.
• You cannot clear the operation log in a measured data file.
Login Information
A user’s password may change during operation.The login information is the user
name and the password at the time that the measured data file was created. To sign a
measured data file, you must log in as a user that is registered in the login information in
that measured data file. You cannot view the login information.
For information about the display, see the DAQSTANDARD Viewer manual.