System variables

The following system variables are only available if the corresponding internal process variables are defined in the project file:

System variable identifier	Function
__CURRENT_USER.FULLNAME	Returns the full name of the user currently logged in.
__CURRENT_USER.GROUPNAME	Returns the user group name of the user currently logged in.
__CURRENT_USER.GROUPTEXT	Returns the language-switchable user group name of the user currently logged in.
__CURRENT_USER.LEVEL	Indicates the authorisation level of the user currently logged in.
__CURRENT_USER.NAME	Returns the login name of the user currently logged in.
__CURRENT_USER.SECONDS_TO_AUTOLOGOFF	Indicates the number of seconds until automatic logout.

These variables must be defined in order to fulfil their function. However, they are also included in the variable count for licensing. The developer can delete the variables if they are not required.

In addition, there are the following system variables that are created without the corresponding definitions in the variable server.

System variable identifier	Function
__ACKNOWLEDGE_RESET	Sets the acknowledgement status of all currently pending alarms to "not acknowledged".
__ACTIVE_ALARMS	Returns the number of pending alarms.
__ACTIVE_ITEMS	Returns the number of all active variables.
__CHANNEL_STATE_<x>	<x>: Channel name. Specifies bit-encoded information on the communication status. The bits have the following meanings: No bit set No error in communication 0 - START_ERROR Error when starting the channel 1 - STATE_ERROR Channel in incorrect run status (OPC server only) 2 - ITEM_ERROR Variable error during communication 3 - CREATE_ERROR Error when creating at least one variable 4 - ADD_ERROR Error when adding at least one variable to a group 5 - VALIDATE_ERROR Error when validating variables 6 - RECONNECT_ERROR Channel is currently trying to reconnect an OPC server. 7 - SUSPENDED Communication via the communication channel is in a stopped state, i.e. it is not taking place. The channel can be reactivated by resetting the bit (value = 0). 8 - CHECK_DISCONNECT The channel is currently being checked for functionality and may then be deactivated.
__CYCLE_MAX	Specifies the maximum cycle time of the variable server since the start.
__CYCLE_TIME	Indicates the current cycle time of the variable server.
__MASTER_SERVER	Currently not implemented.
__SYSTEM_STATE	Returns the system status.

These variables are not included in the variable count for licensing. However, it should be noted that variables with the same name should be avoided.