Rockwell-automation 1775-KA PLC-3 Communication Adapter Module User Ma Manual de usuario descargar pdf (Pagina 88)

Message Procedure Commands

Chapter 6

610

There are two functions:

TO_BCD

FROM_BCD

Figure 6.2 illustrates the format of these functions as they might appear in

an assignment command.

Figure 6.2

Examples

of TO-BCD and FROM-BCD Functions

$D:12 = TO_BCD (27)

COUNT = FROM_BCD ($D:12)

Function Parameter

Function

Assignment Command

Destination of

Resulting Value

10028–I

The parameter of the function must be enclosed in parentheses. The

parameter may be any one of the following:

A direct numeric value (either decimal or octal)

An expression

A user symbol

A logical address

A symbolic address

TO_BCD Function

The TO_BCD function converts its parameter into a binary coded decimal

value that is 32 bits long. For example, the TO_BCD function in

Figure 6.2 stores the number 27 in binary–coded–decimal format in word

12 of the decimal section of PLC–3 memory. After this function is

executed, word 12 will contain the following bit pattern:

0000 0000 0010 0111

1 2 ... 83 84 85 86 87 88 89 90 91 92 93 ... 238 239

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Rockwell-automation 1775-KA PLC-3 Communication Adapter Module User Ma Manual de usuario Pagina 88