Rockwell-automation 1760-xxxx Pico GFX-70 Controllers User Manual Manuale Utente Scaricare il pdf (Pagina 257)

Publication 1760-UM002B-EN-P - March 2005

Wiring with Pico GFX-70 4-147

Figure 4.69 Signal diagram of timing relay, off-delayed

(with/without random switching with/without retriggering)

• Range E:

The Trigger coil drops out twice. The set time t

s

consists of t

1

plus t

2

(switch function not

retriggerable).

• Range F:

The Trigger coil drops out twice. The actual time t

1

is cleared and the set time t

s

elapses

completely (retriggerable switch function).

Timing relay, on-delayed and off-delayed with and without random switching

Time value >I1: On-delayed time

Time value >I2: Off-delayed time

Random switching:

The contact of the timing relay switches randomly within the setpoint value

range.

E

t

1

+ t

2

= t

s

1

2

4

3

t

s

F

t

1

1 2 ... 252 253 254 255 256 257 258 259 260 261 262 ... 399 400

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