Rockwell-automation 1760-xxxx Pico GFX-70 Controllers User Manual Manual de usuario Pagina 243

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Publication 1760-UM002B-EN-P - March 2005
Wiring with Pico GFX-70 4-133
Figure 4.58 Pico GFX-70 circuit diagram with pulse width modulation
Parameter Display and Parameter Set for Pulse Width Modulation
The parameter display for a timing relay is used to modify the period duration,
the minimum on time and the enabling of the parameter display.
Value and Time Ranges
Inputs
The function block inputs >SV, >PD and >ME can be assigned the following
operands:
Constants
Markers MD, MW, MB
Analog inputs IA01 to IA04
IA01: terminal I7
IA02: terminal I8
IA03: terminal I11
IA04: terminal I12
M 95---------------------------[ PW01EN
PW01E1-------------------------[ M 96
PW02 +
>SV
>PD
>ME
PW02 Pulse width modulation function block number 02
+ Appears in the parameter display
>SV Manipulated variable input
>PD Period duration in ms
>ME Minimum on duration, minimum off duration in ms
Parameter Value and time range Resolution
SV 0 to 4095 1 digit
PD 0 to 65535 m
ME 0 to 65535 ms
IMPORTANT
The minimum time setting for the period duration is: 0.005
s (5 ms)
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