IFM Electronic AC402S - Use Remanent Variables

SmartPLC SafeLine AC4S with fieldbus interfaces
49
>
7.2.1 Use remanent variables
42556
The Standard PLC of the device supports the use of remanent variables. Variables declared as VAR
RETAIN are stored in a memory area that is also maintained when the device is switched off.
The declaration of a variable as RETAIN also influences its behaviour when the Standard PLC
application is reset (→Supported reset variants (→ S. 112)).
The memory area for RETAIN variables comprises 4072 bytes.
► Pay attention to the maximum size of the RETAIN memory area when declaring RETAIN
variables!
>
7.2.2 Supported programming languages
42571
The following table shows which programming languages according to IEC 61131 are supported by
the ifm function libraries:
Library
Function Block Diagram (FBD)
Sequential Function Chart (SFC)
Instruction List (IL)
Continuous Function Chart (CFC)
Ladder Diagram (LD)
Structured Text (ST)
ACnnnn_Utils.library
X
X
X
X
X
X
ACnnnn_SYS_CMD.library
X
X
X
X
X
X
Legend:
X ... is supported
– ... is not supported
>
7.2.3 Change system time of the device
42484
WARNING!
The use of the CODESYS function SysTimeRtcSet for setting the time may lead to
malfunction.
> Risk of undesired system behaviour
► To set the system time (date, time) of the device only use the following device-specific
commands:
 Function block Set_DateTime (→Set_TimeDate (→ S. 168)
 System command 0x1109 with function block ACnnnn_SysCmd
(→ACnnnn_SysCmd (→ S. 179))