45
6
EXPLANATION OF COMPARISON FUNCTIONS
45
EX
PLANATION OF COMPARIS
ON FUNCTIONS
Chapter
6
6-2.
HI/LO limit comparison of calculated value /
ch1 value / ch2 value
Set the HI/LO limit of calculated value/ch1 value/ch2 value.
Calculated value
-99999
~
99999
Ch1 value / ch2 value -19999
~
19999
<
HI/LO output conditions
>
・
HI
Indicated value
>
HI limit
・
LO
Indicated value
<
LO limit
<
OK output conditions (calculated value)
>
・
OK
LO limit
≦
Indicated value
≦
HI limit
* The OK output conditions basically depend on the calculated value, but it can also be
output as the ch1 value and ch2 value are intertwined. See "6-6. Comparison OK
output conditions" on page 49.
■
HI/LO limit setting method
HI/LO limit setting mode function
6-3.
Hysteresis
This function is to allow a margin for timing at which HI/LO of the HI/LO limit comparison is
turned off. Normally, HI is turned on when the indicated value exceeds the HI limit and is turned off
when the indicated value falls below it. However, by setting the hysteresis, HI is turned off when
the indicated value falls below the HI limit further lowered by the hysteresis value. This function is
effective to prevent chattering (phenomenon in which signals repeat turning on/off immediately
after switching of relay contacts and switch contacts) in such a case where signals fluctuate
(vibrate) subtly.
The setting is common to the calculated value, ch1 value, and ch2 value, which operates
individually.
<
Hysteresis range
>
0
~
9999
<
HI/LO output conditions
>
・
HI
ON conditions
Indicated value
>
HI limit
OFF conditions Indicated value
≦
(HI limit setting value
-
Hysteresis setting value)
With ±LOAD, OFL1, or OFL2 on ch1 or ch2, HI/LO of the error channel is forcedly
turned on.
Also, HI/LO of the calculated value is forcedly turned on, and OK is forcedly
turned off.
Point
Summary of Contents for F350
Page 1: ...01MAR2015REV 1 04 F350 OPERATION MANUAL ...
Page 115: ......