Rockwell-automation 5370-UPK CVIM USER-PAK Option Manual de usuario descargar pdf (Pagina 83)

Chapter 8

Defining Strings for Serial Ports and Viewports

8–7

Special Characters: N, /, %, #

These four characters have special functionality within the string text:

N – the newline character

/ – the character code indicator

% – the formula indicator

# – the index character

The N (newline) character

Serial Ports: Place the letter N (upper or lower case) in the string to

transmit both the ASCII carriage return [CR] and line feed [LF] characters.

This can be especially useful if the string is intended for printing.

Example: Assume – gage 1 result = 125, gage 2 result = 450

This string

transmits this:

G1 G2 _ _ _ _ _ _ 125 _ _ _ _ _ _ 450 (where “_” is a space).

G1 n G2 n _ _ _ _ _ _ 125 [CR] [LF]

_ _ _ _ _ _ 450 [CR] [LF]

Viewports – Lower Case n: Place the letter n (lower case) in the string to

cause the remainder of the string to be displayed on a “new line” beneath the

first part of the string. This case be useful in displaying columns of items.

Example: Assume – gage 1 result = 125, gage 2 result = 450

This code

displays this:

G1 G2 _ _ _ _ _ _ 125 _ _ _ _ _ _ 450 (where “_” is a space).

G1 n G2 _ _ _ _ _ _ 125

_ _ _ _ _ _ 450

Viewports – Upper Case N: The letter N (upper case) has the same effect

as the lower case letter n, with this addition:

If a string with the N (upper case) character at the end is used with the

Repeat String feature to display a column of items for an inspection, and

for one iteration of the repeated display, the string content is not displayed

(because the defined Event for that string did not occur), the N causes a

blank line to be inserted where the string would have appeared had it been

displayed. When the lower case n is used under these conditions, no

blank lines are displayed.

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Rockwell-automation 5370-UPK CVIM USER-PAK Option Manual de usuario Pagina 83