Rockwell-automation 1760 Pico GFX-70 Controllers Quick Start Instrukcja Użytkownika Pobierz pdf (Strona 38)

Publication 1760-QS002A-EN-P - April 2004

6-6 Lesson 4

setpoint SH). We can use this signal in the circuit diagram to reset

marker byte 1 to zero.

The function block coils are located on the left of the function block

and are also shown in normal type. These coils are needed for

activating a function block or supplying it with count pulses. We have

already implemented the supply of the count pulses via C_.

If you have used any contacts or coils in the circuit diagram, this is

highlighted in the function block with green circles .

To complete the wiring of our circuit diagram let's move back to it

(menu: View, Function Blocks or via the button).

The aim of our task is to visually display the actual value of the

counter using outputs Q1-Q4. As the actual value is stored in marker

byte 1, we can use marker bits 1-4 (M1 - M4) for controlling the

outputs (see the following table).

The control of Q1-Q4 is implemented as follows:

Applicable to

MD, MW, MB,

Left = Most

significant bit,

byte, word

Right = Least

significant bit,

byte, word

32-bit MD1

16-bit MW2 MW1

8-bit MB4 MB3 MB2 MB1

1-bit M32...M25 M24...M17 M16...M9 M8...M1

1 2 ... 33 34 35 36 37 38 39 40 41 42 43 ... 57 58

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Rockwell-automation 1760 Pico GFX-70 Controllers Quick Start Instrukcja Użytkownika Strona 38