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Programming wiring
MN05013005E
152
Rules for wiring relay coils
Relay with contactor function
Coil with contactor function
Ä
The output signal follows immediately after the input signal
and the relay acts as a contactor.
Figure 89: Signal diagram of contactor function
Impulse relay
ä
The relay coil switches whenever the input signal changes
from 0 to 1. The relay behaves like a bistable flip-flop.
:
Figure 90: Signal diagram of impulse relay
J
A coil should only be used once in order to retain an
overview of the relay states. However, retentive coil
functions such as
S
,
R
,
ä
can be used several times.
The following applies to non-retentive coil functions such as
Ä
(contactor),
Å
(negated contactor),
È
,
è
(rising and falling
edge detection): Each coil must only be used once. The last
coil in the circuit diagram determines the status of the relay.
Exception: When working with jumps, the same coil can be
used twice.
on
on
on
on
