Two-Decimal-Place Mode - Omron CPM1 - PROGRAMING MANUAL 02-2001 Programming Manual

Temperature Sensor Units

3-2-8 Two-decimal-place Mode

Data Structure
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Leftmost 3 Digits and Flags
Rightmost 3 Digits and Flags
208
If pin 2 on the DIP switch is turned ON, values are stored to two decimal places.
In this case, temperature data is stored as 6-digit signed hexadecimal (binary)
data with 4 digits in the integer portion and 2 digits after the decimal point. The
actual data stored in memory is 100 times the actual value, i.e., the decimal point
is not indicated. Methods for handling this data are described in this section.
Note When set to store values to two decimal places, temperature data as far as two
digits after the decimal point is converted to 6-digit binary data, but the actual
resolution is not 0.01 C ( F). For this reason, there may be skipping and inaccu-
racies in the first digit after the decimal point (0.1). Treat any resolution above
that specified for the normal data format as reference data.
The structure of the data stored in memory is shown below. The value will be 100
times the actual temperature.
15 14
Leftmost/ Temperature
Rightmost Flag Unit Flag
0: Leftmost 0: C
1: Rightmost 1: F
15 14
Leftmost/ Temperature
Rightmost Flag Unit Flag
0: Leftmost 0: C
1: Rightmost 1: F
Leftmost/Rightmost Flag: Indicates whether the leftmost or rightmost 3 digits are provided.
Temperature Unit Flag: Indicates whether the temperature is in C or F.
Open-circuit Flag: Turns ON (1) when an open-circuit is detected. The temperature
data will be 7FF FFF if this flag is ON.
13 12
Open-circuit
Not used.
Flag
0: Normal
Always 0
1: Error
13 12
Open-circuit
Not used.
Flag
0: Normal
Always 0
1: Error
Section
Temperature data
5 4
x16 x16
Temperature data
2 1
x16 x16
3-2
3
x16
0
x16