Rockwell Automation 1760-xxxx Pico Controller User Manual - Manual (Page 89)

Publication 1760-UM001D-EN-P - September 2005
Draw a Circuit Diagram with Pico 4-29
Typically, delay times are >40 ms for the 1760-L12xxx and >80 ms for
the 1760-L18xxx. This is because a time value less than the maximum
scan time of the Pico controllers may cause uncontrolled switching
states.
Timing Relays, On-Delay, Without and With Random Switching
The relay switches a contact after the setpoint delay has elapsed. With
random switching, the relay contact switches randomly at any time up
to the specified time value (shown shaded in figure).
Timing Diagram
Time Units and Setpoint Time Parameters Resolution
S 00.00 Seconds 10 x milliseconds, 00.00 to 99.99 10 ms
M:S 00:00 Minutes: seconds, 00:00 to 99:59 1 s
H:M 00:00 Hours: minutes, 00:00 to 99:59 1 min.
Parameter Set Displayed via the PARAMETER Menu Option
+ Access enabled - Access disabled
X Switch with on-delay
Switch with on-delay and random time range
Switch with off-delay
Switch with off-delay and random time range
Switch with single-pulse
Switch with flashing
?X
X
Switch Function
Parameters Description
X ?X
t t t
A B C
Output
Reset
Trigger
On
On
On