Eaton easyE4 User Manual

6. Function blocks
6.1 Manufacturer function blocks
 Description Note
MV
Manual manipulated variable
Value range: -4096 ... +4095

When UNP mode is selected: and neg-
ative values are entered at MV, the func-
tion block returns a zero at output QV.
KP Proportional gain factor
The input KP is used to define a proportional gain factor.
The value <100> corresponds to a KP factor of 1, the value 50 corresponds to a KP of
0.5 etc.
Scan time Tc
The TC input defines the time between the function block calls. Values between 0.1s
and 6553.5s can be defined.
If the TC scan time is set to 0, the program cycle time defines the time difference
between the function block calls. This may cause irregularities in the control
response as the program cycle time is not always constant. The ST (set cycle time)
function block should be used to set a constant program cycle time, please refer to →
"ST - Set cycle time", page 559.
A combination of two devices easyE4 is ideal for applications
requiring lengthy calculations or visualizations such as PID
closed-loop control tasks with the PID controller and also
visualization functions at the same time.
In these kinds of applications, move the time consuming cal-
culations to a second device, possibly without an integrated
display, which you can connect via NET.
Assigning operands
You can assign the following operands to the function block inputs that are numeric
inputs.
Operands Value inputs
Constant, timer constant
1)
x
MD, MW, MB - Markers
x
NB, NW, ND - NET markers
2)
x
nNB, nND, nND- NET markers
2)
NET station n
x
IA - Analog input
x
QA - Analog output
x
QV - QV - Numeric output of a FB
x
1)
Only on function blocks T, AC
2)
Only on projects with ≥ 2 base devices on NET
You can assign the following operands to the function block inputs that are bit inputs:
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Eaton easyE4 Specifications

General

Brand	Eaton
Model	easyE4
Category	Relays
Language	English