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CHAPTER 8 FUNCTIONS
8
8.12 Shift Function
8.12 Shift Function
This function adds (shifts) the set conversion value shift amount to a digital output value. When the conversion value
shift amount is changed, it is reflected to the digital operation value in real time. Therefore, fine adjustment can be
easily performed when the system starts.
(1) How the shift function operates
The set conversion value shift amount is added to digital output value. Then, the digital operation value after shift-
and-add is stored in CH Digital operation value (RWr2 to RWr5, RWr12 to RWr15).
When the scaling function is used, the conversion value shift amount is added to the value to which the scale-
conversion is performed.
The shift amount is added in every sampling cycle for sampling processing, while it is added in every averaging
process cycle for averaging processing.
The default value of the conversion value shift amount is "0". If a value is set to the conversion value shift
amount, this conversion value shift amount is added regardless of turning on and off Initial data setting request
flag (RY9).
(2) Setting procedure
The setting procedure for the main A/D converter module is as follows:
1. Set "Method selection" to "Parameter write".
"CC IE Field Configuration" window Select the main A/D converter module from "List of stations"
[CC IE Field Configuration] [Online] [Parameter Processing of Slave Station]
2. In "Basic module parameter", set "CH A/D conversion enable/disable setting" to "0: Enable".
3. Set the value to be added to CH Shifting amount to conversion value (RWw2 to RWw5).
Item Setting range
CH Shifting amount to conversion value (RWw2 to RWw5) -32768 to 32767
1) Digital output value
(before adjustment)
0
-10
5
Analog input voltage (V)
0 -10
5 15990
2) Digital operation value
(after adjustment)
Input voltage
(V)
CH
Digital output value
00
5 16000
Input voltage
(V)
CH
Digital operation
value (RWr2 to RWr5)
1) CH Digital output value
CH Shifting amount to
conversion value
(RWw2 to RWw5, RWw12 to RWw15)
2) CH Digital operation value
(RWr2 to RWr5, RWr12 to RWr15)
+
+10
16000
15990
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