Eaton easyE4 series Manual page 274

6. Function blocks
6.1 Manufacturer function blocks
270
Period duration to minimum ON duration ratio
The ratio of the period duration/minimum on duration (P/M) determines which per-
centage of manipulated variables have no effect.
The minimum on duration must be set as low as possible so that P/M is as high as pos-
sible.
If, however, a very short on duration has no effect on the connected actuator, it is advis-
able to suppress these short on phases in order to reduce the load on the hardware. In
this case, the period duration should not be set too low.
Assigning operands
You can assign the following operands to the function block inputs that are numeric
inputs.
Operands
Constant, timer constant
MD, MW, MB - Markers
NB, NW, ND - NET markers
nNB, nND, nND- NET markers
NET stations n
IA - Analog input
QA - Analog output
QV - QV - Numeric output of a FB
You can assign the following operands to the function block inputs that are bit inputs:
Operands
Constant 0, constant 1
M – Markers
RN - Input bit via NET
SN - Output bit via NET (send)
N - Net marker bit
nN - NET marker bit NET station n
ID: Diagnostic alarm
LE - Output backlight
P buttons
I - Bit input
Q - Bit output
Q - Bit output of a FB
Function block outputs
Description
(Bit)
E1 Error output
1: if the value is below the minimum on dur-
ation or minimum off duration.
easyE4 11/18 MN050009 EN www.eaton.com
Value inputs
x
x
x
x
x
x
x
Bit inputs
x
x
x
x
x
x
x
x
x
x
x
x
Note
The range limits are checked irrespective
of the edge change on the Boolean EN
input.