Wiring with the logic relay
130
1SVC 440 795 M0100
These tasks can be implemented with the following solution.
I8 starts the drives. I7 and I6 carry the feedback signals of the
motor-protective circuit-breakers. The drives are stopped if a
motor-protective circuit-breaker trips. The analog value
comparators control the difference of the path distance. The
appropriate drive is stopped temporarily if one path distance
is outside of the set tolerance. The coils and contacts have
the following meanings:
• M8 = enable for all drives
• Q1 = drive 1, counter drive 1 is connected with input I1
and this with high-speed counter C13.
• Q2 = drive 2, counter drive 2 is connected with input I2
and this with high-speed counter C14.
• A1 = comparison, if C13 is less than C14, drive 2 is too
fast.
• A2 = comparison, if C14 is less than C13, drive 1 is too
fast.
• A3 = comparison, if C13 and C14 are equal, both drives
can be activated.
• The hysteresis value of A1, A2 and A3 depends on the
resolution of the transducer and the mechanical system.
Circuit diagram display Parameter settings of the counter C13
I8-I7-I6-ÄM8
M8ua2u---ÄQ1
dA3k
da1u---ÄQ2
hA3k
--------uCC
13
hCC
14
C13 H +
S +0
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