Eaton easy500, easy700, Руководство по эксплуатации, Страница: 80 / 240

4 Wiring  with
4.2 Working with contacts and relays
76
Operating instructions 05/10 MN05013003Z-EN www.eaton.com
4.2.6.7 Latching relay
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.
:
Figure 45: Latching relay signal diagram
• Range A: The Set coil and the Reset coil are triggered at different times
• Range B: Reset coil is triggered at the same time as the Set coil
• Range C: Power supply switched off
Representation in easy:
• Q output relays:
SQ1
to
SQ8
,
RQ1
to
RQ8
(depending on type)
• M markers:
SM1
to
SM16
,
RM1
to
RM16
• (Text) D function relays:
SD1
to
SD8
,
RD1
to
RD8
• Relays S:
SS1
to
SS8
,
RS1
to
RS8
Use each of the two relay functions
S
and
R
once only per relay.
If both coils are triggered at the same time, priority is given to the coil further
down in the circuit diagram. This is shown in the above signal diagram in
section B.
on
on
S
R
on
A B C
I1-I2----SQ1
I2-------RQ1
￫
A latched relay is automatically switched off if the power fails or
if the device is in STOP mode. Exception: Retentive coils retain
signal 1 (
￫ Section "5.9 Retention (non-volatile data storage)“,
page 181).