100
8.10
Shift Function
Using this function, the D/A converter module outputs the converted digital value with the shifting set value added, in
analog.
When the shifting set value is changed, it is reflected to the analog output value in real time. Therefore, fine adjustment
can be easily performed when the system starts.
(1) How the shift function operates
The shifting set value is added to a digital value, and the added digital value is output in analog.
When the scaling function is used, the scale conversion is executed after the addition by the shift function.
By default, the shifting set value is "0". If some value is set to the shifting set value, the shifting set value is added
regardless of the status change (OFF
ON
OFF) of Initial data setting request flag (RY9).
(2) Setting procedure
The setting procedure for the main D/A converter module is as follows:
1.
Set "Method selection" to "Parameter write".
"CC IE Field Configuration" window
Select the main D/A converter module from "List of stations"
[CC IE Field Configuration]
[Online]
[Parameter Processing of Slave Station]
2.
Set "CH
D/A conversion enable/disable setting" to "0: Enable".
3.
Set a value for CH
Shifting set value (RWw6 to RWw9).
By default, the shifting set value is "0".
Item
Setting range
CH
Shifting set value (RWw6 to RWw9)
-32768 to 32767
5
0
12000
0
11990
Digital value
Analog output voltage (V)
Adds the shifting set value
-10
1) Digital value
(before adjustment)
-10
0
11990
5
Digital value
(before adjustment)
Output voltage (V)
0
0
12000
5
Digital value + Shifting set value
(after adjustment)
Output voltage (V)
2) Digital value + Shifting set value
(after adjustment)
2) Digital value +
Shifting set value
(after adjustment)
CH
Shifting set value
(RWw6 to RWw9,
RWw16 to RWw19)
+10
1) Digital value
(before adjustment)