Yokogawa Removable Chassis DX1000N - Manual (Page 40)

1-29
IM 04L41B01-01E
Overview of Functions
1
2
3
4
5
6
7
8
9
10
11
12
App
Index
• Recording Conditions of Event Data
Item Description
Source channels Same as the display data.
Sampling interval Select from the available settings between 25 ms to 30 min. However,
you cannot specify an interval that is faster than the scan interval.
File creation A file is created when the specified data length is reached.
Files are also created in the following cases.
• When a file is created manually.
• When the memory sampling is stopped.
• When file creation is executed with the event action function.
• After recovering from a power failure.
Mode The available modes are Free (continuously record), Single, and
Repeat. The recording operation varies depending on the mode as
follows:
Free
Press the START key to start recording (memory start) and the STOP
key to stop the recording (memory stop) .
Time
File File File Adding data
Single
Pressing the START key places the DX in the trigger-wait state. When
the trigger condition is met, the DX records data for a specified time (data
length) and stops. From this point, the DX does not record even if the
trigger condition is met.
Time
File
Trigger condition met
Repeat
Pressing the START key places the DX in the trigger-wait state. When
the trigger condition is met, the DX records data for a specified time
(data length) and stops. The DX enters the trigger-wait sate again and
keeps recording the data for a specified time (data length) each time the
trigger condition is met. To stop the recording of the event data, press
the STOP key.
Time
File File
Trigger condition met Trigger condition met
Pretrigger of Event Data
The pretrigger can be specified in trigger mode.
This function is used to save the data before the point where the trigger condition
is met as event data. This function is convenient when you wish to record the data
before the occurrence of a certain event such as when an alarm occurs.
Specify the pretrigger as a percentage (0, 5, 25, 50, 75, 95, or 100%) of the recording
time (data length) of the event data. If set to 0%, the data after the trigger condition is
met is recorded.
Time
Trigger condition met
Data before
the trigger
Data after
the trigger
Trigger for Starting the Event Data Recording
When set to trigger mode, you can set various conditions for starting the recording.
Example: Key operation, alarm occurrence, specific time, or remote control
1.4 Data Storage Function