Rockwell-automation 1760-xxxx Pico GFX-70 Controllers User Manual Uživatelský manuál stáhnout pdf (Strana 214)

Publication 1760-UM002B-EN-P - March 2005

4-104 Wiring with Pico GFX-70

The function block operates according to the following equation:

Y(t) = [T

a

/T

g

] x [K

p

x x(t) - Y(t-1)]

Y(t) = calculated output value for scan time t

T

a

= Scan time

T

g

= Recovery time

K

p

= proportional gain

x(t) = Actual value with scan time t

Y(t-1) = Output value with scan time t - 1

Scan time:

Scan time T

a

depends on the set recovery time value.

GET, Fetch a Value from the Network

The function block allows you to selectively read (get) a 32-bit value from the

network. The GET function block fetches data which another station has

made available on the Pico-Link network with a PUT function block.

IMPORTANT

The function block updates the output value every time

recovery time T

g

expires.

Recovery time T

g

Scan time T

a

0.1 s to 1 s 10 ms

1 s to 6553 s T

g

x 0.01

1 2 ... 209 210 211 212 213 214 215 216 217 218 219 ... 399 400

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