Omron CRT1 - 10-2008 Operation Manual page 324

Analog Input Slave Units
Input Range and
Conversion Data
The analog data that is input can be converted to digital data according to the
input range, as described here. If the input exceeds the input range, the AD
conversion data will be fixed at the upper or low limit.
■ Input Range: 0 to 5 V
The voltage range 0 to 5 V corresponds to 0000 to 1770 hex (0 to 6,000). The
convertible data range is FED4 to 189C hex (
ages are expressed as two's complements (16 bits). When a disconnection
occurs, the data equivalent to 0 V input will be used (0000 hex).
Conversion data
Hexadecimal (decimal)
189C (6300)
1770 (6000)
0000 (0)
−0.25 V
0 V
FED4 (−300)
■ Input Range:1 to 5 V
The voltage range 1 to 5 V corresponds to 0000 to 1770 hex (0 to 6,000). The
convertible data range is FED4 to 189C hex (
age falls below the input range (input voltage less than 0.76 V), a disconnec-
tion is detected and the data is set to 7FFF hex.
Conversion data
Hexadecimal (decimal)
189C (6300)
1770 (6000)
7FFF
0000 (0)
1 V
0.8 V
FED4 (−300)
0.76 V
(Disconnection detected below 0.76 V.)
■ Input Range: 0 to 10 V
The voltage range 0 to 10 V corresponds to 0000 to 1770 hex (0 to 6,000).
The convertible data range is FED4 to 189C hex (
voltages are expressed as two's complements (16 bits). When a disconnec-
tion occurs, the data equivalent to 0 V input will be used (0000 hex).
Section 6-4
300 to 6,300). Negative volt-
–
Voltage
5 V 5.25 V
300 to 6,300). If the input volt-
–
Clamped above 5.2 V.
Voltage
5 V 5.2 V
300 to 6,300). Negative
–
301