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Wiring with EZ
MN05013003E126
Function of the frequency counter
Figure 56: Signal diagram of the frequency counter
1: counter input I3 or I4
2: upper setpoint
3: enable coil CC…
4: reset coil RC…
5: contact (make contact) C... upper setpoint value reached.
t
g
: gate time for the frequency measurement
• Range A: the counter is enabled. Contact C15 (C16) switches
after a frequency above the setpoint was measured for the first
time.
• Range B: If the actual value falls below the setpoint, the contact is
reset. The removal of the enable signal resets the actual value to
zero.
• Range C: the counter is enabled. After a frequency above the
setpoint was measured for the first time, contact C15 (C16)
switches.
• Range D: The reset coil resets the actual value to zero.
1
2
3
t
g
t
g
t
g
t
g
t
g
t
g
t
g
t
g
4
5
t
g
A
BC
D
EZ500_700.book Page 126 Tuesday, May 3, 2005 5:15 PM
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