Analog value comparator/threshold value
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Circuit diagram with analog value comparator.
Figure 51: Signal diagram of analog value comparator in Equal to
mode
1: actual value at I8, multiplied with gain factor F2
2: setpoint plus hysteresis value
3: setpoint
4: setpoint minus hysteresis
The make contact switches on if the actual value at I8 (multiplied
by F1) reaches the configured setpoint. If the value exceeds the
setpoint plus hysteresis, the make contact switches off. If the
actual value at I8 (multiplied by F1) falls to the setpoint, the make
contact switches on. If the actual value falls below the setpoint
minus hysteresis, the make contact switches off.
A8-------ÄQ3
J
The values F2 +0 and OS +0 were not defined. No
values are used with a gain factor, and no offset is used. A
gain factor of 10 is used with the analog value at I8. The
hysteresis is adjusted accordingly.
on
off
1
2
3
4
EZ500_700.book Page 109 Tuesday, May 3, 2005 5:15 PM
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