Rockwell Automation 1760-xxxx Pico Controller User Manual - Manual (Page 93)

Publication 1760-UM001D-EN-P - September 2005
Draw a Circuit Diagram with Pico 4-33
Signal Diagram:
The relay contact of a counter with setpoint value 6 switches when
the actual value is 6 (A). If the counting direction is reversed (B), the
contact switches off when the actual value is 5. Without a counting
pulse, the actual value is retained (C). The reset coil resets the counter
to 0 (D).
Possible applications include the counting of components, lengths or
event frequency.
Program a Counter Relay
You can integrate a counter relay into your program in the form of a
contact and coil. Counter relay C1 receives counting pulses via the
count coil CC1. The counting direction can be changed via the
direction coil DC1:
• If DC1 = 0, relay C1 counts up.
• If DC1 = 1, relay C1 counts down.
The Reset coil RC1 is used to reset the counter to 0.
Contact C1 is used to process the result of the counter in the circuit
diagram. To prevent unpredictable operation, use each coil of a relay
only once in the circuit diagram.
Enter at least one contact and a coil in your circuit diagram:
• A relay contact in the contact field, in this case C1
• A count coil in the coil field, in this case CC1
CCx
DCx
RCx
8
6
4
2
0
7
5
3
1
B A C D
Output
Reset
Direction
Count
On
On
On On
On