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MELSEC-Q
3 SPECIFICATIONS
3.4.19 CH warning output upper/lower limit values (Un\G86 to 101)
(1) Set the range (0.1 increments) on each channel.
(2) The warning output range region can be set in four levels of the warning output
upper upper value, upper lower value, lower upper value and lower lower value.
(3) When the detected measured temperature value is higher than or equal to the
warning output upper upper limit value, or lower than or equal to the warning
output lower lower limit value (when the value enters the warning output range), a
warning occurs.
When a warning occurs, "1" is stored to the bit of the corresponding channel in the
warning output flag (buffer memory address 48: Un\G48), and the warning output
signal (XD) turns ON.
(4) After a warning occurrence, when the temperature value falls lower than the
warning output upper lower limit value or rises higher than the warning output
lower upper limit value and returns to within the setting range, the warning is
cleared.
When the warning is cleared, "0" is stored in the bit position corresponding to the
channel of the warning output flag (buffer memory address 48: Un\G48).
The warning output signal (XD) turns OFF only when all channels return to within
the setting range.
Upper upper
limit value
Upper lower
limit value
Lower upper
limit value
Lower lower
limit value
Warning output range section
Included
T
em
per
at
ure
Time
Warning
occurrence
Warning clear
Warning occurrence
Warning clear
Out of warning output range section
(5) At power-on or reset, the minimum and maximum values of the measured
temperature range of the setting range set as the measurement range (set using
GX Developer) are stored.
The upper upper limit value is set to be equal to the upper lower limit value, and
the lower upper limit value equal to the lower lower limit value.
Setting
Settings at Power-On or Reset
Setting mode
Setting range
Lower lower
limit value
Lower Upper
limit value
Upper upper
limit value
Upper lower
limit value
Allowable
Temperature Range
0 -200000
850000
-200000
to
850000
1
-20000
120000
-20000 to 120000
Pt 100
(New JIS)
4
0
200000
0 to 200000
2 -180000
600000
-180000
to
600000
3
-20000
120000
-20000 to 120000
JPt.100
(Old JIS)
5
0
200000
0 to 200000
Ni100
Ω
8
-60000
180000
-60000 to 180000
Setting range 0 to 3 can be used for the Q64RD/Q64RD-G. Setting range 4, 5 and 8 is allowed for the Q64RD-G
only.
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