Omron CP1H-CPU - 05-2006 Operation Manual page 351

Analog I/O (XA CPU Units)
320
When the resolution is set to 1/12,000, the 0 to 10-V range corresponds to
hexadecimal values 0000 to 2EE0 (0 to 12,000). The entire data range is
FDA8 to 3138 ( 600 to 12,600).
A negative voltage is expressed as a two's complement.
The following diagram shows conversion values for 1/6,000 resolution.
Converted Data
Hexadecimal (Decimal)
189C (6300)
1770 (6000)
0.5 V 0000 (0)
0 to 5 V Input
When the resolution is set to 1/6,000, the 0 to 5-V range corresponds to hexa-
decimal values 0000 to 1770 (0 to 6,000). The entire data range is FED4 to
189C ( 300 to 6,300).
When the resolution is set to 1/12,000, the 0 to 5-V range corresponds to
hexadecimal values 0000 to 2EE0 (0 to 12,000). The entire data range is
FDA8 to 3138 ( 600 to 12,600).
A negative voltage is expressed as a two's complement.
The following diagram shows conversion values for 1/6,000 resolution.
Converted Data
Hexadecimal (Decimal)
189C (6300)
1770 (6000)
0.25 V
0000 (0)
1 to 5 V Input
When the resolution is set to 1/6,000, the 1 to 5-V range corresponds to hexa-
decimal values 0000 to 1770 (0 to 6,000). The entire data range is FED4 to
189C ( 300 to 6,300).
When the resolution is set to 1/12,000, the 1 to 5-V range corresponds to
hexadecimal values 0000 to 2EE0 (0 to 12,000). The entire data range is
FDA8 to 3138 ( 600 to 12,600).
Inputs between 0.8 and 1 V are expressed as two's complements. If the input
falls below 0.8 V, open-circuit detection will activate and converted data will be
8000.
The following diagram shows conversion values for 1/6,000 resolution.
10 V 10.5 V
0 V
FED4 ( 300)
0 V 5 V 5.25 V
FED4 ( 300)
Section 5-5