1-1
Section
Features and Functions
3
The peak value function holds the maximum digital conversion value for every
input (including mean value processing). This function can be used with analog
input. The following diagram shows how digital conversion values are affected
when the peak value function is used. For details, refer to
2-5-4 Peak Value
Function
.
Peak value hold
Digital conversion value
t (Time)
The output hold function can be used to hold the analog output value at any pre-
set value when there is an error at the PC’s CPU Unit. When conversion is
stopped, CLR, HOLD, or MAX can be selected for output. For details, refer to
3-5-2 Output Hold Function
.
The mean value function can be used to remove erroneous values that occur
due to factors such as noise that is included in analog inputs. The operating
mean is taken without affecting the data refresh cycle. For details, refer to
2-5-3
Mean Value Processing
and
4-5-3 Mean Value Processing
.
The A/D and D/A converter offset deviation and gain deviation can be adjusted
for each input and output. The offset and gain adjustments are made with the
Unit set for the adjustment mode, and the adjustment values are stored in the
Unit’s built-in EEPROM. For details, refer to
2-6 Offset Gain Adjustment
,
3-6 Off-
set Gain Adjustment
, and
4-8 Offset Gain Adjustment
.
Analog Input Unit
(Input signal range: 0 to 10 V)
Analog Output Unit
(Output signal range: 0 to 10 V)
Gain
adjustment
Gain
adjustment
Adjustable range
Adjustable range
Analog input
10 V
Offset adjustment
Offset adjustment
Analog
output
10 V
The C200H-MAD01 Analog I/O Unit can output in analog format the results of
analog inputs calculated for ratio and bias. For details, refer to
4-7 Ratio Conver-
sion Function
.
Input 1
Input 2
Output 1
Output 2
Ratio and bias
calculation
Ratio and bias
calculation
Peak Value Function
Output Hold Function
Mean Value Function
Offset and Gain
Adjustment Function
Ratio Conversion
Function
