Rockwell Automation 1760-xxxx Pico Controller User Manual - Manual (Page 119)

Publication 1760-UM001D-EN-P - September 2005
Draw a Circuit Diagram with Pico 4-59
On-Delay Timing Relay
The on-delay can be used to gate short pulses or to initiate another
movement after a time delay when a machine is started.
The parameter settings for T1 are:
• Timing function on-delayed: “
X ”
• Time value and range: 10 seconds
If I1 is switched on, the trigger coil (TRG) of T1 is energized. After
10 seconds, T1 turns on the output relay Q1. If I1 is switched off,
relay coils T1 and Q1 drop out and the timer is reset.
Count Up Counter
The count up counter keeps track of a given number of events. Once
its preset number of counts is reached, the counter energizes an
output. This can be used for keeping track of reject parts. Once the
reject parts bin contains 20 parts, the bin is emptied by energizing an
output. The counter is reset by a second input.
Each time I1 is energized, counter C1 adds one to its counter. I1 must
be de-energized before C1 recognizes another count. When I1 has
been energized 20 times, C1 turns on output Q1. When input I2 is
energized, the C1 counter is reset by using the reset instruction (RC1).
Logic Table
I1 State Q1 Q1
0 0 0
0 to 1 0 1
0 1 1
0 to 1 1 0
Logic Table
I1 T1 Q1
0 0 0
1 0 0
1 1 1
I1---------- Q1
I1---------TT1
T1---------{Q1
10.00
TRG
RES
T1
X
S
{
+
I1---------CC1
C1---------{Q1
DIR
CNT
RES
C1 {
+
I2---------RC1
{
0020