IDEC WindO/I-NV4, User Manual

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5 Message Display
10-116
WindO/I-NV4 User’s Manual
5.4 String Data Storage Method
The values of device addresses read as character codes are stored in the upper byte and lower byte of words
according to the Storage Method of String Data setting. Storage Method of String Data is configured on the
System tab in the Project Settings dialog box.
For details, refer to Chapter 4 “3.1 System Tab” on page 4-25.
Example: When reference device address D100 = 3132 (Hex), D101 = 3334 (Hex), D102 = 3500 (Hex)
• When from Upper byte is selected for Storage Method of String Data
• When from Lower byte is selected for Storage Method of String Data
NULL terminating character
Device address
Stored value
Displayed string
Upper byte Lower byte
D100 31 (Hex) 32 (Hex) 12
D101 33 (Hex) 34 (Hex) 34
D102 35 (Hex) 0 5
NULL terminating character
Device address
Stored value
Displayed string
Upper byte Lower byte
D100 32 (Hex) 31 (Hex) 21
D101 34 (Hex) 33 (Hex) 43
D102 0 35 (Hex)
When handling values of device addresses as character
codes, 0 is handled as the NULL terminating character
to end the string. Therefore, when the upper byte is 0,
nothing is displayed.
• When handling values of device addresses as character codes, 0 is handled as the NULL terminating
character to end the string. Therefore, when the upper byte is 0, nothing is displayed.
• To display only a single character, set the lower byte to 0.
Example: To display a single-byte 7
3700(Hex) ‘7’