Delta DVP-ES2 User Manual download pdf (Page 27)

100

101

1. PLC Concepts

1-19

Example 9 – Oscillating Circuit with Timer

An oscillating circuit with cycle nT+ΔT

TMR

TTn

When X0 = ON, T0 starts timing (nT). Once the set time is reached, contact T0 = ON to enable

Y1(ΔT). In next scan, Timer T0 is reset due to the reversed status of contact Y1. Therefore contact

T0 is reset and Y1 = OFF. In next scan, T0 starts timing again. The process forms an oscillating

circuit with output cycle nT+ΔT.

Example 10 - Flashing Circuit

The ladder diagram uses two timers to form an oscillating circuit which enables a flashing indicator

or a buzzing alarm. n1 and n2 refer to the set values in T1 and T2 and T refers to timer resolution.

T2TMR Kn2

TMR

Kn1

X0 T1

Tn2

Example 11 - Trigger Circuit

In this diagram, rising-edge contact X0 generates trigger pulses to control two actions executing

interchangeably.

Example 12 - Delay OFF Circuit

If X0 = ON, timer T10 is not energized but coil Y1 is ON. When X0 is OFF, T10 is activated. After

100 seconds (K1000 × 0.1 sec = 100 sec), NC contact T10 is ON to turn off Y1. Turn-off action is

delayed for 100 seconds by this delay OFF circuit.

T10

TMR

T10

K1000

Timer Resolution: 0.1 sec

100 seconds

1 2 ... 22 23 24 25 26 27 28 29 30 31 32 ... 701 702

Comments to this Manuals

No comments

Delta DVP-ES2 User Manual Page 27

Comments to this Manuals