Eaton easyE4 series Manual page 243

Operands
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
(Bit)
OF
FB
CY
ZE
(DWord)
QV
easyE4 11/18 MN050009 EN www.eaton.com
6.1 Manufacturer function blocks
Value inputs
x
x
x
x
x
Bit inputs
x
x
x
x
x
x
x
x
x
x
x
x
Description
Overflow
1: if QV ≥ SH
Fall below
1: if QV ≤ SL
Carry
1: if QV > value range
Zero
1: if QV = 0
Current counter value in RUN mode
6. Function blocks
Note
OF=1, if the actual value is
greater than or equal to the
upper threshold value;
FB=1, if the actual value is less
than or equal to the lower
threshold value;
If the value range is exceeded,
the switch contact switches to
status 1 for one cycle per rising
edge detected. The function
block retains the value of the
last valid operation before the
contact CY is set.
The pulses at channel A and
channel B are counted. 2 pulses
are counted per counting
period.
Example: 2 pulses at channel A
239