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3. SPECIFICATIONS
3.3.5
Detected temperature
Temperatures in the range of -180 °C to +600 °C can be detected using the AJ65BT-64RD.
Of the temperature detected, the values to the first place and third place below decimal point are
stored in the remote register (Refer to Section 4.7).
(1) Value to the first place below decimal point
The value to the first place below the decimal point of the detected temperature is multiplied by
10, then stored as 16-bit signed binary data.
The data to be stored is in the range of – 1800 to + 6000.
Example: When the temperature detected at CH. 1 is 216.025 °C
216.0 25 °C
To the 1st digit below
decimal point
(2) Value to the third place below decimal point
The value to the third place below decimal point of the detected temperature is multiplied by
1000, then stored as 32-bit signed binary data.
The data to be stored is in the range of -180000 to +600000.
Example: When the temperature detected at CH. is 216.025 °C
216.0 25 °C
To the 3rd digit below
decimal point
3.3.6
Designating the platinum temperature-measuring resistor type
The platinum temperature-measuring resistors listed below can be used for AJ65BT-64RD.
• Pt100 ............. New JIS, IEC type (JIS C 1604-1997, IEC 751-1983)
• JPt100 ........... Old JIS type (JIS C 1604-1981)
By setting the type of the platinum temperature-measuring resistor to be used using the platinum
temperature-measuring resistor designation pin, all channels are set to the designated type.
POINT
Two types of platinum temperature-measuring resistors cannot be used simultaneously.
When two types of platinum temperature-measuring resistors are used, the
channel which connects the resistor of a type different from designation cannot obtain a correct
detected temperature value.
2160
10 times
Stored in the remote register, RWrn
(CH1 detected temperature (16-bit) storage area)
of AJ65BT-64RD.
216025
1000 times
Stored in the remote register, RWrn+4 and RWrn+5
(CH1 detected temperature (32-bit) storage area)
of AJ65BT-64RD.
3-10
MELSEC-A
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