Rockwell Automation 1760-xxxx Pico GFX-70 Controllers User Manual - Manual (Page 243)

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)