Fuji Electric MICREX-SX series - Page 67

4-35
Section 4 Software Interface
4-3 Analog Input/Output Module
3) When offset/gain adjustment mode is activated
For offset/gain adjustment, data is set in the locations shown below:
* When using D300win, assign INT type variables to these registers.
15(F) 078
+7
+6
Channel No. to monitor
Free (fixed to 0 (zero))
For analog input
At the rising edge at which status
changes from OFF to ON,
adjustment values are stored in
the module internal EEPROM.
For analog output
At the rising edge at which status
changes from OFF to ON,
adjustment values are stored in
the module internal EEPROM.
Analog input
OFF:
ON:
Analog output
OFF:
ON:
ON: Down is specified.
ON: Up is specified.
Offset value is displayed
Gain value is displayed
Offset value is displayed
Gain value is displayed
<Analog input Offset/gain adjustment>
In this mode, offset value and/or gain value can finely be adjusted for individual channel.
 Offset value: Means the lower limit value of the range span. When this value is adjusted, the conversion characteristic curve
moves parallel in vertical direction.
 Gain value: Means the upper limit value of the range span. When this value is adjusted, only gain value is changed while
offset value is kept unchanged.
When offset and gain values are changed by scaling, the values that are set by scaling take effect as offset and gain values.
When offset and/or gain values are to be adjusted after scaling, adjust by the values of scaling.
Note 1: Offset/gain adjustable range is within 1% of range span. If adjustment is made using an analog value that exceeds
the adjustable range (if the value is input to a terminal of the module), the value is limited to 1% of range span.
Note 2: If range is changed, offset and gain return to the default values.
Note 3: Offset/gain adjustment is disabled when analog range is set in a batch with the switch provided on the module rear
panel.
<Example 1 of gain/offset adjustment>
Analog input voltage (V)
Digital output value
(INT type)
16400
16000
Practicable digital
output range
-400
-0.125
5 5.125
Gain value
Offset value
0
Offset and gain values for the range of 0 to 5 V.