Working with contacts and
relays
85
1SVC 440 795 M0100
Coil functions
You can set the coil function to determine the switching
behaviour of relay coils. The following coil functions are
available for relays Q, M, S, D, “:”:
Table 7: Coil function
Marker relays M and N are used as a flag. The S relay can be
used as the output of an expansion unit or as a marker if no
expansion unit is connected. The only difference between
them and the output relay Q is that they have no output
terminals.
Circuit diagram
display
CL
display
Coil function Example
Ä Contactor
function
ÄQ1, ÄD2, ÄS4,
Ä:1, ÄM7
Å Contactor
function with
negated result
ÅQ1, ÅD2, ÅS4
è Cycle pulse on
falling edge
èQ3, èM4, èD8,
èS7
È Cycle pulse on
rising edge
ÈQ4, ÈM5, ÈD7,
ÈS3
ä Impulse relay
function
äQ3, äM4, äD8,
äS7
S Set (latching) SQ8, SM2, SD3,
SS4
R Reset
(unlatching)
RQ4, RM5, RD7,
RS3
h
The coil functions of the function relays are described in
the descriptions for the appropriate relays.