User manual

Publication 1760-UM001A-EN-P
Drawing a Circuit Diagram with Pico 4-23
Timing Relays, Single Pulse
The relay switches a contact for a time equal to the delay
time set, regardless of the length of the trigger signal.
Figure 4.6 Signal Diagram
:
The reset coil has priority over the trigger coil and resets the relay contact before
the time has elapsed. If the time is set to zero, the contact is set for the duration of
one program scan.
The cycle time varies according to the length of the circuit diagram.
Typ ic al ap pli ca tio n s
• Adjusting switching signals to a defined pulse length
• Shortening pulses to the duration of a cycle (one-shot)
Timing Relays, Flashing
The relay closes and opens the relay contact alternately with the
flashing frequency.
Example
tt
Output
Reset
Trigger
On
On
On
= flash
Flash Frequency
1
2Set Time
×
-------------------------------=
Set Time: 0.2s, Flash Frequency
1
0.4s
--------- 2 . 5 H z==