Precautions - Mitsubishi Electric Q01UCPU User Manual

3.38.4

Precautions

This section describes the precautions for the operation history function.
(1) Operation history display and data update during execution of another
function
The operation history cannot be displayed and data cannot be updated
functions. Check that the following functions are not being executed before displaying the operation history or
updating data.
• Restoration by the CPU module change function with memory card
• Restoration by the CPU module data backup/restoration function
*1 Data update indicates the operation of clicking the [Refresh] button in the "Operation History" window of the
programming tool. For details, refer to the following.
GX Works2 Version 1 Operating Manual (Common)
(2) Operating history clear during execution of anther function
No operation history can be cleared during execution of the following functions. Check that the following functions
are not being executed before clearing the operation history.
• Backup and restoration by the CPU module change function with memory card
• Backup and restoration by the CPU module data backup/restoration function
(3) Combination with the data logging function
When the operation history function is used, the collecting performance of the data logging is decreased.
Therefore, missing may occur in the data logging with the setting where no missing has been occurred.
(4) Operation history display and data update during an operation to be saved
such as device data writing
It is recommended to display the operation history or update data when the operation to be saved as the
operation history is not being performed.
If device data writing is executed frequently with the setting for saving device data writing, it may takes several
tens of seconds to display operation history or update data due to frequent save processing of the operation
history. In addition, "*HST LOSS*" may appear when the operation history is displayed or data is updated. (
Page 322, Section 3.38.1 (4))
324
*1
during execution of the following