Rockwell-automation 5370-UPK CVIM USER-PAK Option Manual de usuario descargar pdf (Pagina 86)

Chapter 8

Defining Strings for Serial Ports and Viewports

8–10

Example – We want to display the statistical mean for gages 1–8. To do this,

we would use the data code for statistical mean value, Sn.3, where n

represents the tool type and number. For this data code, the n values 9–16

indicate gages 1–8.

We could use the following string:

”

Gage” # ” Mean = ” S #+8 . 3 n

and use the Repeat String feature, with Start = 1, End = 8, Increment = 1.

In this string, the term # + 8 is used for the n value in the data code Sn.3:

Data code Sn.3

”Gage” # ” Mean = ” S #+8 . 3 n

n= #+8

where

When this string is repeated for index values from 1–8, the n value #+8

(current index value + 8) indexes through the values 9–16. In this way, eight

strings are displayed, which provide the mean values for gages 1–8:

Gage 1 Mean = 144.560

Gage 2 Mean = 222.666

Field Formatting Codes

You can, at your option, specify the format of the contents of any numerical

field, that is, fields in the displayed or transmitted strings which correspond

either to tool results (or other data), or to the index (#) number. You specify

field format by placing a field formatting code in parentheses immediately

following the data code (or index character) in the string you are defining.

In defining the format, you can simply specify the “field width,” which limits

the number of places a field will occupy in the serial message (the default

format is 9 places). Or, you can further define the format by also specifying

other characteristics, such as limiting the number of decimal places used (for

floating point results only), or specifying left justification of data within the

field.

For instance, within a serial port string, the data code G1 will transmit the

result of the gage 1; the transmitted field will, by default, be 9 places in

width. However, entering the code G1(3), where (3) is the format code,

transmits the result of the gage 1, and limits the field for that result to three

places in the serial message.

Likewise, within a viewport string, the data code G1 will display the result of

the gage 1; the displayed field will, by default, be 9 places in width.

However, entering the code G1(3), where (3) is the format code, displays

1 2 ... 81 82 83 84 85 86 87 88 89 90 91 ... 141 142

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Rockwell-automation 5370-UPK CVIM USER-PAK Option Manual de usuario Pagina 86