Eaton easyE4 Manual page 364

6. Function blocks
6.1 Manufacturer function blocks
360
For applications in which this cannot be fulfilled, the cycle time should be set with the
ST (set cycle time) function block so that the scan time is an integral multiple of the
cycle time.
t cyc ∙ n = T A
mit n = 1,2,3, ...
The function block always works with a scan time that is an integral multiple of the
cycle time. This can cause the set recovery time to be lengthened.
In the case of time-consuming application scenarios in which,
for instance, a signal smoothing filter and a PID controller are
used and visualization tasks need to be executed sim-
ultaneously, the cycle time may be extended to an extent that
may not be tolerable for controller tasks. In these kinds of
applications, move the time-consuming calculations to a
second device connected via easyNet – please refer to
The function block and its parameters
Function block inputs
Description
(Bit)
EN 1: Activates the function block.
(DWord)
I1 Input value
TG Recovery time TG [0.1 s]
KP Proportional gain Kp [%]
Value range: 0 ... 65535
Assigning operands
You can assign the following operands to the function block inputs that are numeric
inputs.
Operators
1)
Constant, timer constant
MD, MW, MB - Markers
NB, NW, ND - NET markers
nNB, nND, nND- NET markers
NET station n
IA - Analog input
easyE4 10/19 MN050009 EN www.eaton.com
Value inputs
x
x
2)
x
2)
x
x
Note
Value range: -32768...+32767
Value range: 0...65535
The value 10 corresponds to a recovery
time of 1000 ms.
Value range: 0...65535
The value 100 corresponds to a KP
(factor) of 1.
The value 50 corresponds to a KP of 0.5.