6.COMPARISON FUNCTIONS
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6. COMPARISON FUNCTIONS
By the comparison function, the HI limit and LO limit values are set, and when the
indicated value exceeds the HI limit, the HI output is turned on, and when the indicated
value falls below the LO limit, the LO output is turned on. Also, HI-HI limit and LO-LO
limit values may be set outside the HI-LO limit comparison. When the indicated value
exceeds the HI-HI limit, the HH output is turned on, and when the indicated value falls
below the LO-LO limit, the LL output is turned on. When the HI, HH, LO and LL
outputs are all off, the OK output is turned on.
<HI/LO output conditions>
HI: indicated value > HI limit value
LO: indicated value < LO limit value
<HH/LL output conditions>
HH: indicated value > HI-HI limit value
LL: indicated value < LO-LO limit value
<OK output conditions>
OK: All conditions of HH, HI, LO and LL are off.
Time
Indicated value
HI Limit
LO Limit
HI
LO
OFF
ON
OFF
ON
HI-HI Limit
LL Limit
OFF
ON
OFF
ON
HH
LL
OFF
ON
OK
Va lue
Va lue
Va lue
Va lue
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