Rockwell-automation 1760-xxxx Pico GFX-70 Controllers User Manual Manual do Utilizador descarregar pdf (Página 247)

Publication 1760-UM002B-EN-P - March 2005

Wiring with Pico GFX-70 4-137

Set Cycle Time

Pico GFX-70 provides one set cycle time function block ST01. The set cycle

time function block is a supplementary function block for the PID controller.

The set cycle time function block provides a fixed cycle time for processing the

circuit diagram and the function blocks.

Wiring a Set Cycle Time Function Block

The ST set cycle time function block is integrated in the circuit diagram as a

coil.

Figure 4.60 Pico GFX-70 circuit diagram with enabling of set cycle time function

block.

Parameter display for set cycle time:

The parameter display is used to modify the set cycle time, the minimum on

time and the enabling of the parameter display.

Inputs

The function block input >I1 can be assigned the following operands:

• Constants

IMPORTANT

To prevent unpredictable switching states, use each coil of a

relay once only in the circuit diagram.

-------------------------------[ ST01EN

ST01 +

>I1

ST01 Set cycle time function block number 01

+ Appears in the parameter display

>I1 Set cycle time

Table 4.61 Time Range

Parameter Value and time range Resolution

I1 0 to 1000 ms

1 2 ... 242 243 244 245 246 247 248 249 250 251 252 ... 399 400

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