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[Conversion method from returned data to temperature in Celsius]
The temperature in Celsius is computed as Tc from the following formula where Dt is the signed integer number converted
from the above described 10 bit binary value of “Db=B’D9D8…D0”:
Internal temperature of camera: Tc=Dt×0.5°C
(Example 1) Where Td, the returned value of the temperature data, is “H’0032” in the hexadecimal system, it is
expressed in the binary system as follows:
Td=H’0032=B’0000.0000.0011.0010
∴
Db=B’00.0011.0010 =+50 (Only upper 10 digits of Td are valid.)
Then, Tc is calculated from the following formula: Tc=+50×0.5°C=+25°C
(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'11 1 = B'001 = 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
This equipment is designed to sound the confirmation buzzer of “pip” when a stroke is applied to the UP/DOWN switch on
the rear panel, or at the time of other manipulation including the start-up after power application.
The factory default setting is ON. This setting can be changed to cancel the buzzer.
[Procedure for switching buzzer between ON/OFF]
●
Start up in the Setting Group C. (Set the mode switch to the position “C” while the power is turned off. Then apply the
power while the UP/DOWN switch is positioned to either side.)
●
Change the mode switch to the position 2” after confirming that the orange LED is flashing.
●
When an upward stroke is applied to the UP/DOWN switch, the buzzer is set to be ON. When a downward stroke is
applied, it is set to be OFF.
●
Simply turn off the power after the setting is complete. (The setting is saved.)
(4-8) Camera ID saving function
The ID code and other information set by the user for each camera can be stored in the camera and read out wherever
necessary.
The saved identification data for each camera including installation location in the case of using more than one camera
(e.g., “CAMERA-RIGHT” and “CAMERA-LEFT”) allows the user to easily control and identify the camera (s).
The setting is executed through the serial communication. The settable maximum number of characters are 15, and
alphanumeric characters (both uppercase and lowercase characters) and some special symbols such as ”+” and “-”
excluding the control codes can be used.
(
→
Refer to the section of “Serial Communication Control” for the details.)
