Eaton easyE4

6. Function blocks
6.1 Manufacturer function blocks
The function block and its parameters
Function block inputs

Description Note
(bit) 
EN
1: Activates the function block.
The checkbox for the
Function block release by EN is neces-
sary
parameter must first be enabled
WP
Trigger coil
Rising edge: The value at I1 will be added to
the table and output at function block output
QV. QN will be incremented by 1.

RF
Trigger coil Read First
Rising edge: The oldest value in the table will
be output at function block output QV (FIFO
function). QN will be decremented by 1 with
each read operation.

RL
Trigger coil Read Last
Rising edge: The most recent value in the
table will be output at function block output
QV (LIFO function). QN will be decremented by
1 with each read operation.

RE
Reset
Rising edge: The entire table will be cleared.
Function block output QN will be set to 0.

(DWord)
I1

Input value to be transferred to the table.
Integer value range:
-2,147,483,648 to +2,147,483,647
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:
448
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