Changing The Manipulated Variable - Omron G3ZA User Manual

Changing the Manipulated Variable

4-1

Changing the Manipulated Variable

1,2,3...
Using Manipulated
Variable Calculations
Note
24
The Variable Area Write command is used to change the manipulated vari-
able. The manipulated variable is 0.0% by default when the power supplied is
turned ON. This value can be changed to another value by using the Manipu-
lated Variable Save operation command.
Example: The following procedure can be used to change the manipulated
variable to 20.0% whenever the power supply is turned ON.
1. Execute the Variable Area Write command to set the manipulated variable
to 20.0% for all channels.
2. Execute the Manipulated Variable Save operation command.
3. The manipulated variables will be set to 20.0% the next time power is
turned ON.
Manipulated variable calculations can be used to set the control variable for
one change based on the manipulated variable for another channel. The fol-
lowing calculation method and set values can be used.
Control variable =
Manipulated variable of source channel x Slope/100.0 + Offset
Set value
Channels 1 to 8: Source channel
Channels 1 to 8: Slope
Channels 1 to 8: Offset
(1) The control variable will be clamped at 0% or 100% if it exceeds the range
of 0% to 100%.
(2) The control variable can be read using the Variable Area Read command.
Example:
Channel
Manipulated variable
Source channel
Slope
Offset
Control variable
Control variable (%)
80.0
60.0
40.0
20.0
ch1 ch2 ch3
Setting
Channel 1 to 8 (Set the channel to
use as the source for calculation.)
0.0% to 400.0%
−400.0% to 400.0%
1 2 3
0.0 20.0 0.0
2 2 2
175.0 100.0 125.0
15.0 0.0 5.0
50.0 20.0 30.0
ch4
Section 4-1
4
0.0
2
150.0
10.0
40.0