6. Function blocks
6.1 Manufacturer function blocks
Operands Bit inputs
RN - Input bit via NET
2)
x
SN - Output bit via NET (send)
2)
x
N - Net marker bit
2)
x
nN - NET marker bit
2)
NET station n
x
ID: Diagnostic alarm
x
LE - Output backlight
x
P device buttons
x
I - Bit input
x
Q - Bit output
x
Q - Bit output of a FB
x
2)
Only on projects with ≥ 2 base devices on NET
Parameter set
 Description Note
Function block release by
EN is necessary
If this checkbox is enabled, the
state of function block input EN will
be evaluated. If the checkbox is dis-
abled instead, the function block
will be enabled and function block
input EN will not do anything.
This parameter ensures that
when existing programs are
copied, the functionality of the
function blocks that are carried
over will be retained. The para-
meter will be automatically set to
0 or 1 depending on the function
block.
Parameter display
+ Call enabled
Constants can be edited on the
device, as can function block para-
meters when using the EDP pro-
gramming language.

Simulation NOT possible


Other
Retention
The function block does not recognize retentive data.
Application example
A program consisting of the bit circuit diagram and function block generates a mean
cycle time of approx. 12 ms. Setting the set cycle time to 30 ms will ensure that the
cycle times are kept constant at this value.
560
easyE402/24 MN050009ENEaton.com