Rockwell-automation 1760-xxxx Pico Controller User Manual Manual do Utilizador descarregar pdf (Página 78)

Publication 1760-UM001D-EN-P - September 2005

4-18 Draw a Circuit Diagram with Pico

A coil automatically turns off if the power fails or if Pico is in Stop

mode.

Exception: Retentive coils retain signal 1 (see Chapter 7).

Latching Relay

Instruction Type Representation in Pico

Output Relay Q

Q1… Q8 (depending on type)

Marker Relay M

M1… M16

Text Display Relay D

D1… D8 (1760-L18xxx)

Expansion or Marker Relay

S1… S8 (1760-L18xxx)

Instruction Type Representation in Pico

Output Relay Q SQ1…SQ8, RQ1…RQ8 (depending on type)

Marker Relay M SM1…SM16, RM1…RM16

Text Display Relays D SD1…SD8, RD1…RD8 (1760-L18xxx)

Expansion or Marker Relay SS1…SS8, RS1…RS8 (1760-L18xxx)

S

R

AB C

The ’latch’ and ’unlatch’ relay functions are used in

pairs. The relay picks up when latched and remains

in this state until it is reset by the ’unlatch’

function.

Signal Diagram:

Set

Reset

Output

On

On

On

A - The Set coil and the Reset coil are triggered at different times.

B - Reset coil is triggered at the same time as the Set coil.

C - Power supply switched off.

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