Eaton easyE4 series User Manual

6. Function blocks
6.1 Manufacturer function blocks
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 func-
tion block.
Parameter display
+ Call enabled
Function block parameters and con-
stants can be edited on the device.
Simulation possible
Other
Retention
The function block does not recognize retentive data.
Application example
Different workpieces are moved along a production line with several machining sta-
tions. An operator determines the work required for the individual workpieces, creates
a production code for it and writes it into a shift register. The workpieces reach the
machining stations in this order. When the workpiece is changed, the stations read the
required production steps from their permanently assigned register field. When work-
piece 1 moves to the first station, the forwards pulse input coil SR01FP and the shift
register SR01 receive production code 01 at input SR1I1 from the double word marker
MD11. Production code 1 is now at the register field SR01D1 for the first machining sta-
tion which reads it from double word marker MD01. The finished workpiece is then
transferred to station 2. The shift register accepts the production code 2 for the next
workpiece.
Production code 1 moves one place forwards, as does the remaining register content. It
now stands at register output SR01D2. It reaches machining station 2 via double word
marker MD02. The process is repeated for each further workpiece and for each further
machining station until the finished workpieces leave the line.
When using the EDP programming language, the coils are connected in the circuit
diagram:
The enable coil SR01EN is permanently active, the function block is not switched off.
Marker M09 switches the forwards pulse input coil SR01FP.
-------------------------------Ä SR01EN
M 09---------------------------Ä SR01FP
Figure 173: Circuit diagram with EDP programming language for user example 2
easyE4 11/18 MN050009 EN www.eaton.com
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Eaton easyE4 series Specifications

General

Brand	Eaton
Model	easyE4 series
Category	Relays
Language	English