IDEC High Performance Series - Manual (Page 216)

3 Project Settings Dialog Box
4-30 WindO/I-NV2 User’s Manual
■ Use Device Cache *1
Select this check box to execute processing by reading all the host device values configured for a screen when
switching the base screen or when displaying a popup screen.
On the HG1F/2F/2S/3F/4F, when operating parts in order from the top to the bottom of the Object List, if a value is
written to a host device from a part, the host device can be handled as an internal device so that written value is
immediately reflected. However, since processing is executed by reading all device values including the host devices,
part operations and the communication time for O/I link communication may become significantly slower. This option
is not normally used.
On the HG2G-S/-5S/-5F and the HG3G/4G, written values are reflected regardless of this option.
■ Start Part with synchronous *1
Select this check box to operate commands and HG special relays LSM1, LSM2, LSM3, and LSM5 after reading all the
values of the host devices configured on the screen.
When this check box is cleared, all processing is immediately executed when the screen is displayed.
■ Start from 0 in Always Entry Mode of Numerical Input *1
Select this check box to display 0 when a Numerical Input that has the Always Entry Mode check box selected on
the General tab is displayed on the screen. When this check box is cleared, the device value is displayed.
This option is reflected for all Numerical Inputs configured in the project.
■ Storage Method of String Data *1
Selects the handling method for text entered with the Character Input and device values read by the Message Display.
*1 Advanced mode only
from Upper byte: Device values are read from and written to the upper order byte.
Example: When the text ABCDE is entered with the Character Input and written to the
destination device LDR 100
from Lower byte: Device values are read from and written to the lower order byte.
Example: When the text ABCDE is entered with the Character Input and written to the
destination device LDR 100
Device
Stored value
Upper byte Lower byte
LDR 100 'A' = 41 (hex) 'B' = 42 (hex)
LDR 101 'C' = 43 (hex) 'D' = 44 (hex)
LDR 102 'E' = 45 (hex) 0
NULL terminaƟng character
Device
Stored value
Upper byte Lower byte
LDR 100 'B' = 42 (hex) 'A' = 41 (hex)
LDR 101 'D' = 44 (hex) 'C' = 43 (hex)
LDR 102 0 'E' = 45 (hex)
NULL terminaƟng character
When handling strings, 0 is written to the device as the NULL terminating character and treated as the end
of the string.