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3 SPECIFICATIONS
3.5.4 Alert definition (buffer memory address: 5
3.5.5 Temperature process value (PV value, buffer memory address: 9
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(1) The bit associated with the alert detected on the corresponding channel turns to
"1".
Associated bit
number
b0
b1
b2 to b7
b8
b9
b10
b11
b12
b13
b14
b15
: The temperature measurement range represents the range from the lower limit of -5%
to the upper limit of +5% relative to the full-scale of the input range.
Example) Input range 38
Input range
Temperature measurement range : -230.0 to 430.0
(An alert occurs at the temperature of lower than -230.0°C or higher than
430.0°C.)
(1) Stores the Q64TC-detected value on which the following processings have been
performed:
• Linearization
• Sensor compensation
(2) The value stored varies with the decimal point position (buffer memory address: 1
to 4
) as indicated below:
H
• If the decimal point position is 0, the value is stored as is.
• If the decimal point position is 1, 10 times that value is stored.
POINT
The following value is stored if the temperature detected by the temperature sensor
falls outside the temperature measurement range:
• If the value is higher than the temperature measurement range: +5% of the (input
range upper limit)
• If the value is lower than the temperature measurement range: -5% of the (input
range upper limit)
to 8
)
H
H
PV rose above the temperature measurement range
preset input range.
PV fell below the temperature measurement range
input range.
Unused
Alert 1 turned on.
Alert 2 turned on.
Alert 3 turned on.
Alert 4 turned on.
Heater disconnection was detected.
Loop disconnection was detected (at LBA error).
Output off-time current error was detected.
Unused
MELSEC-Q
Alert definition
: -200.0 to 400.0
to C
)
H
H
of the
of the preset
H
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