20.13.4 Restrictions on Alarm History Sub Display

• The Message Display [Text Display] and Picture Display [State Display] Word Addresses as well as Window Part window control addresses used for a Sub Display are set only in the address of the internal device (LS area, user area).

• The cursor movement and sub display are not linked. Even when the cursor moves, the sub display remains the same.

• Sub displays will not be cleared automatically. Even when an Alarm Message in the sub screen is cleared, the sub display still remains. When, however, the screen is changed, "0" is written to the word address of the Picture Display [State Display] and Message Display [Text Display], and window control address used for the sub display, and the sub display is cleared.

• When displaying a sub screen, only one Alarm Part (History Display) can be set on each base screen. If multiple Alarm Parts (History Display) are set, a sub display is disabled.

• When [Direct Selection] is set, buttons may be hard to touch depending on the calibration of the touch panel^*1 and the message line spacing.

• When [Play Movie] is selected as the Sub Display, the [Sub Display Screen Number] specified in the [Alarm] acts as the index number of the Movie File played on the [Movie Player]. Define a value from 0 to 99.
  Assigning "0" to the Sub Display Screen Number specifies Index Number "0" in the Movie File. For alarms not requiring a Sub Display, assign "9999" to the Sub Display Screen Number. If you assign the index number of a Movie File that does not exist, then the player will stop.

• Bit 8 (Play Bit) of the specified [Play Control Word Address] is used to control play operations. To stop playing the movie, create a switch to turn the Play Bit OFF instead of using a typical stop operation.

• When the Video Display bit is ON, the Video Display takes precedence over the Alarm Sub Display. The Alarm Sub Display is hidden but continues operating. When the Video Display turns OFF, the Alarm Sub Display video continues playing from the elapsed period of time.

• When using a Show Text Window part with units that have a resolution^*2 or screen size that is smaller than VGA (640x480), set the window size of the Show Text Window part to [Small].
  Only the two options [Large] or [Small] are available for the window size. If you select [Large], due to the resolution on small display units, a portion of the window will not appear on the screen.
  

*1 Synchronizes the unit's touch and display settings. You can run this setup on the display unit.

*2 Refer to the following for screen resolutions.
5.4.1 System Settings [Display] Settings Guide