IFM Ecomat 300 AC1307, Основное руководство устройства

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11BProgramming
63BDeviations from the indications in the programming manual
12-1
12 Programming
In an additional manual "User Manual for PLC Programming with CoDeSys
®
2.3"
you will obtain more detailed information about the use of the programming system
"CoDeSys for Automation Alliance". This manual is available as a free download on
the
ifm
website:
→
12.1 Deviations from the indications in the programming manual
As opposed to the indications in the programming manual, the following particulari-
ties apply to the controllere:
•
The functions "Write file to PLC" and "Read file from PLC" in the CoDeSys
menu "Online" are not supported.
•
Retain variables are not automatically stored. To do so, the function block
"Store_Retain" must be retrieved.
•
Task management is not implemented.
• Persistent variables are not implemented.
• Target visualisation is not possible.
12.2 Online changes in the PLC
To reduce the amount of data to be transmitted to the controllere CoDeSys
®
only
transmits the changed program blocks to the PLC. This accelerates programming
in case of program changes during set-up. The term "online change" describes a
function of the unit allowing a change to the PLC program without interrupting the
program. So, the processing of the changed PLC program is possible without re-
setting the outputs.
CAUTION
Dangerous, uncontrolled machine states!
The changeover to the changed PLC project can take up to 100 ms in case of an
"online change". During this time the outputs remain in their current state. The
PLC data are not initialised after the "Online Change".
► Stop the machine/system or bring it into a safe state before changing the PLC
program in the controllere.
→
page 10-4, chapter 10.4 "How are the operating modes for the PLC
changed?"