90
7−2−3. Operation on comparator S1, S2, S3 and S4
The comparator in the instrument, S1, S2, S3 and S4 can select the operation whichever “the
open collector output ON at more than the set value”, or “the open collector output ON at less
than the set value”. These selections can be made in the Function mode.
(Related function F−32)
As for default, the “the open collector output ON at more than the set value” is selected for both
of S1, S2, S3 and S4.
Warning ● Depending on the operational selection for comparator, ON/OFF
condition for each open collector output may differ. If wrong operation
is selected, ON/OFF condition for the open collector output becomes
inadequate and it may cause an unexpected accident due to the
malfunctions on peripheral instruments, so care should be taken fully.
● When the load display is “OL” or “−OL”, the “display value” for the
comparison of comparator is assumed as “＋∞(infinity)” and “−∞
(infinity)” individually.
Operation on judgement display section and the open collector output will be shown as follows
for the S1 as a sample. The same operation is also made in S2, S3 and S4.
(1) When the operation of “the open collector ON at more than the set value” is selected.
S1 judgement display, S1 open collector output ON at (S1 set value)≦(Display value)
S1 set value
Display (large)
Display (small)
S1 judgement display,
S1 open collector output
ON
OFF
(2) When the operation of “the open collector ON at less than the set value” is selected.
S1 judgement display, S1 open collector output ON at (S1 set value)≧(Display value)
S1 set value
Display (large)
Display (small)
S1 judgement display,
S1 open collector output
ON
OFF
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