As a workaround, the time zone can be set via a Linux command line

The package "systemd" must be installed on the system, for timedatectl to be used.

== >> on PFC100/PFC200 runtimes, systemd is not used, but the following commands can be used instead

Use the "/etc/config-tools/config_timezone"-command in place of the "timedatectl set-timezone"-command: 

TZ="CET-1CEST,M3.5.0/2,M10.5.0/3"
or
/etc/config-tools/config_timezone tz-string="CET-1CEST,M3.5.0/2,M10.5.0/3"

The timezone abbreviation list for PFC100/PFC200 can be found here:

cat /usr/share/zoneinfo/allzones

Allow the command first, as described here: SysProcess

The list of available time zones can be read out via the command line

timedatectl list-timezones




Declaration

VAR
	sCmdCet		: STRING := 'timedatectl set-timezone Europe/Berlin';
	sCmdGmt		: STRING := 'timedatectl set-timezone Etc/GMT';
	xSetGmt		: BOOL;
	xSetCet		: BOOL;
	rtsResult	: SysTypes.RTS_IEC_RESULT;
	diReturn	: DINT;
END_VAR



Implementation

IF xSetGmt THEN
	xSetGmt	:= FALSE;
	diReturn := Sysprocess.SysProcessExecuteCommand(pszComand := sCmdGmt, ADR(rtsResult));
END_IF

IF xSetCet THEN
	xSetCet	:= FALSE;
	diReturn := Sysprocess.SysProcessExecuteCommand(pszComand := sCmdCet, ADR(rtsResult));
END_IF