User's Manual

Chapter 3 Creating and Editing Screens
History Buffer Setup Dialog Box
Sample Cycle
(ms)
Set the sampling cycle time for reading the address (how long it
takes to read the address one time). If the Trigger option is PLC,
this option will be unavailable. The range of the sampling cycle
time for one day is 0 – 86400000 ms.
Sample
Number
This option is used with the Auto Stop option. If the Auto Stop
option is selected, HMI stops recording the data after the
numbers of records have reached the setting value of Sample
Number option. If the Auto Stop option is not selected, when
record number of data exceeds the setting value of Sample
Number option, it will delete the first record and insert the new
record into the last address.
For example, if the setting value is set to 100 and the number of
records in history exceeds 100, the first record will be deleted
and the second record will become the third record, the third
record will become the forth record…and the 100th record will
become the 99th record. Therefore, the new record (101st
record) will become the 100th record.
The record data will be name as “History.dat” and the user
needs to use the software, FlashTransfer which is attached in
the HMI editing software, to open this file. FlashTransfer will
sort and list the history data by record time automatically.
Stamp Time
and Date
When this option is enabled, the time and date are also recorded
during sampling operation.
Auto Stop
When this option is enabled, HMI stops recording when the
maximum number of record data is reached.
Buffer
Properties
Retained
(Non-Volatile)
Using this option can enable HMI to save sampling data in
SRAM. The capacity for saving history data of DOP-B series is
240 Kbytes. The battery of the SRAM provides power when the
power is turned off. (In some DOP-B series models, the user can
save data in USB disk or CF card when the power is turned off
and the capacity for saving alarm data depends on the capacity
of the USB disk or CF card.) In addition, the file name can also be
user-defined.
3-242 Revision May, 2010