Rockwell-automation 1760-xxxx Pico GFX-70 Controllers User Manual Manual do Utilizador descarregar pdf (Página 253)

Publication 1760-UM002B-EN-P - March 2005

Wiring with Pico GFX-70 4-143

Memory Requirement of the Timing Relay

The time relay function block requires 48 bytes of memory plus 4 bytes per

constant on the function block input.

Retention

Timing relays can be operated with retentive actual values. The number of

retentive timing relays can be selected in the SYSTEM → RETENTION menu.

If a timing relay is retentive, the actual value is retained when the operating

mode changes from RUN to STOP as well as when the power supply is

switched off.

If Pico GFX-70 is started in RUN mode, the timing relay operates with the

retentively saved actual value. The state of the trigger pulse must correspond

to the function of the timing relay.

1 signal when:

• on-delayed,

• single pulse,

• flashing.

0 status for off delayed.

Function of the Timing Relay Function Block

Timing relay, on-delayed with and without random switching

Random switching

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

range.

1 2 ... 248 249 250 251 252 253 254 255 256 257 258 ... 399 400

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