Omron C200H Operation Manual page 32

Functions and Programming
BCD Data Conversion
0 V
2-3-4 Square Root Function
Function
Setting Method
Square Root Calculation
22
0 to +10 V
+1 to +5 V/+4 to +20 mA
+10 V
+1 V +5 V
+4 mA +20 mA
Input signal
Note 1. The maximum digital output value will be used if the analog input signal ex-
ceeds the maximum value of the specified input signal range (+10 V or
+5 V/+20 mA) and the minimum digital output value will be used if the analog
input signal falls below the minimum value of the specified input signal range
(0 V, +1 V/+4 mA, or –10 V).
2. The digital output value will be 0000 when the input signal range is set to –10
to +10 V and the analog input signal is 0 V. The sign bit will be 0, and there is
no output value of 8000.
Converts quadratic input data, such as data from a thermocouple input, to linear
data (0000 to 4000 BCD) and outputs the converted data.
This function can be used at the same time as other functions. When the square
root function is used together with the scaling or mean value functions, the scal-
ing or mean value processing is performed after the square root processing.
This function operates on BCD data only, so the conversion data type setting is
ignored.
The square root function is set with bits 08 to 15 of DM word m+3. Set the corre-
sponding bit to "1" to enable the square root function for that input.
Bit 15
DM (m + 3)
The square root function is performed with the following equation and the deci-
mal portion of the result is truncated.
Square root data + 4000
When the input signal range is set to –10 to +10 V, calculate the input data (BCD
conversion data) with –10 V as 0000 and +10 V as 4000.
–10 to +10 V
–10 V
Input signal
Sign bit (15
14 13 12 11 10
input data (BCD conversion data)
Section 2-3
0 +10 V
th
bit)
09 08
0: Square root
function disabled
1: Square root
function enabled