Rockwell-automation 1760-xxxx Pico GFX-70 Controllers User Manual Bedienungsanleitung PDF herunterladen (Seite 249)

Publication 1760-UM002B-EN-P - March 2005

Wiring with Pico GFX-70 4-139

Timing Relay

Pico GFX-70 provides 32 timing relays from T 01 to T 32.

A timing relay is used to change the switching duration and the make and

break times of a switching contact. The delay times can be configured between

5 ms and 99 h 59 min.

Wiring a Timing Relay

You integrate a timing relay into your circuit in the form of a contact and coil.

The function of the relay is defined via the parameter display. The relay is

started via the trigger coil T..EN and can be selectively reset via the reset coil

T..RE. The actual timeout running can be stopped via the third coil T..ST.

Figure 4.62 Pico GFX-70 circuit diagram with timing relay.

ATTENTION

The shorter the cycle time, the faster the control and

regulation process.

Set as small a value for the set cycle time as possible. The

processing of the function blocks, reading of the inputs and

writing of outputs is only carried out once every cycle.

Exception: All function blocks that are processed

irrespective of the controller.

IMPORTANT

To prevent unpredictable switching states, use each coil of a

relay once only in the circuit diagram.

I 01---------------------------[ T 02EN

I 02---------------------------[ T 02RE

T 02Q1-------------------------[ Q 01

I 03---------------------------[ T 02ST

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