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(Example 2)
Where Td, the returned value of the temperature data, is "H'03FA" in the hexadecimal system, it is
expressed in the binary system as follows:
Td=H'03F1=B'0000.0011.1111.1010
∴ Db=B'11.1111.1010 (Only upper 10 digits of Td are valid.) → Dt=-6 (↓ Refer to [Explanation])
Then, Tc is calculated from the following formula: Tc=Dt×0.5° C=-6×0.5° C=-3° C
[Explanation] Example of conversion algorithm from data in the complement number system to signed data
The following example shows how to convert 10 digit data in the complement number system into ordinary signed data:
(1) Whether the value is positive or negative is determined by checking the uppermost bit (MSB) out of the 10 digit number.
When the MSB is 0, "+" is added, and when it is "1", "-" is added to the number (absolute value) to be obtained in
accordance with the below described (2).
(2) The absolute value is obtained from a binary number expressed in the remaining 9 digits including the lowermost bit
(LSB) as follows:
Simply convert into an integer number if the MSB is 0 ("+" sign) in accordance with (1).
Reverse each of all the 9 digits and add 1 to the result if the MSB is 1 ("-" sign) in accordance with (1).
(3) The signed number is obtained from (1) for the sign and (2) for the absolute value.
* In the case of the (Example 2) as above, its sign is "-" because the MSB is 1 in accordance with (1). The absolute value
is "6" because of (invert(B'11111010)+ 1 = B'00000101 +1 = 5+1 =6) in accordance with (2). Therefore, this value (Dt) is
expressed as "-6" in the ordinary signed number system.
(4-7) Operation confirmation buzzer
The confirmation buzzer bleeps at the time of start-up after power is turned on and others.
The factory default setting is ON. This setting can be changed to cancel the buzzer.
[Procedure for switching buzzer between ON/OFF]
● The setting can be changed to ON using serial communication command "H'28" with the argument [H'01].
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N11A27;11/37
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