Addressing

Property	Description
Name	Name of the variable. Automatically defined during creation. Can be chosen freely for user-defined variables.
Identification	Any text can be entered here, e.g. for resource labels, comments ...
Net address	not used for this driver.
Data block	not used for this driver
Offset	Only for user-defined variables. Offset of the variable; the memory address of the variable in the PLC. Configurable [0.. 4294967295]
Alignment	not used for this driver
Bit number	not used for this driver
String length	Only available for String variables: Maximum number of characters that the variable can take.
Driver object type	not used for this driver
Data type	Only for user-defined variables. Data type of the variable, which is selected during the creation of the variable; the type can be changed here later. ATTENTION: If you change the data type later, all other properties of the variable must be checked and adjusted, if necessary.

System variables are created via a special dialog that is loaded upon creation of a variable:

Local variables

Theses variables exist locally on every computer and can vary between different computers. The behavior of the variable can change, according to the position of the computer in the network topology.

Distributed variables

These variables are distributed in the network and are the same on all computers in the network. The process handling server is the source.

List with all existing system driver variables, including data types and content/function description. Variables named "...local" are intended only for the local client and are not obtained from the server.

Since zenon version 6.20, a Wizard for the Editor is included, which allows for the automatic setup of the system driver variables.

Topic	Content (Name)	Data type	Comment
Alarms	Alarms not acknowledged	UDINT	Shows the number of not acknowleged alarms in the memory
Alarms	Alarms On / Off	BOOL	Shows the status of the alarm management 0 = off 1 = on
Alarms	Alarms acknowledged	UDINT	Shows the number of acknowleged alarms in the memory
Alarms	Number of alarms	UDINT	Shows the number of alarms in memory.
Archives	Memory (Archives)	UDINT	Shows the amount of memory reserved for archive data processing (e.g. in the Extended Trend Module).

Command input			Only available in the Energy Edition
Command input	Action identification	DINT	Identifies the type of the currently active action 0 = Single command 1 = Double command 2 = Setpoint input 3 = Status input 4 = Replace 5 = Manual correction 6 = Block 7 = Release 8 = Lock 9 = Revision 1000 = Not defined
Command input	Picture name	STRING	Name of the current command picture
Command input	Picture step	DINT	Number of the current step of the command input 0 = Initialization 1 = Step 1 2 = Unlock 3 = Step 2 4 = Lock 5 = Execution
Command input	Name of the action variable	STRING	Name of the data point on which the current action is executed.
Command input	Name of the RM variable	STRING	Name of the response variable
Command input	Name of the interlocking	STRING	Name of the active command interlocking
Command input	Parameter of the action	UDINT	Parameter of the current action. In case of a single command, the command input status will be displayed; otherwise, the current switching direction will be displayed
Command input	Update	BOOL	This data point is set to 1 if the listed data points are consistent.
Command input	Interlocking code	UDINT	Status of the current interlocking. 0 = Not checked 1 = No active interlocking 2 = Value already set 3 = Not used 4 = Not used 5 = Write failure 6 = Internal Error 7 = Not used 8 = Data point type invalid 9 = Not used 10 = Command interlocking does not exist 11 = Action does not exist 12 = Not used 13 = Not used 14 = Value missing 15 = Invalid value 16 = Topology unlockable 17 = Topology not unlockable 18 = Not used 19 = Not used 20 = Interlocking of the action unlockable 21 = Interlocking of the action not unlockable 22 = Not used 23 = Locked against command input 24 = Locking administration invalid 25 = SBO expired 26 = Timeout for SBO activation 27 = Timeout for SBO Deactivation 28 = Timeout for Action execution 29 = SBO expired
Command input	Interlocking message	STRING	Text of the current interlocking condition.

User defined		BOOL, INT, LREAL, REAL, SINT, STRING, UDINT, UINT, USINT	These are local variables that are not updated in the network. Possible offsets: 1001 - 65535

Printers	Alarm printer – Jobs	UDINT	Current number of waiting print jobs for the configured alarm list printer.
Printers	Alarm printer – Name	STRING	Name of the currently configured alarm list printer.
Printers	Alarm printer – Status	UDINT	Shows the current status of the alarm list printer. Printer_Status_Paused = 0x00000001, Printer_Status_Pending_Deletion=0x00000004
Printers	Hardcopy printer – Jobs	UDINT	Current number of waiting print jobs for the configured harcopy printer.
Printers	Hardcopy printer – Name	STRING	Name of the currently configured harcopy printer.
Printers	Hardcopy printer – Status	UDINT	Shows the current status of the hardcopy printer. Printer_Status_Paused = 0x00000001, Printer_Status_Pending_Deletion=0x00000004
Printers	List printer – Jobs	UDINT	Current number of print jobs waiting for the configured offline list printer.
Printers	List printer – Name	STRING	Name of the currently configured offline list printer.
Printers	List printer – Status	UDINT	Shows the current status of the offline list printer. Printer_Status_Paused = 0x00000001, Printer_Status_Pending_Deletion=0x00000004
Printers	Online printer On/Off	BOOL	Status of the the online alarm / event list printer administration. 0 = off 1 = on
Printers	Who is printing online? AML / CEL	BOOL	Shows, for which module the online print is active. 0 = Alarm list 1 = Event list

HW Ressources	Free memory (%)	UDINT	Shows the available memory of the current workstation in %.
HW Ressources	Free memory (%) – SB	UDINT	Shows the available memory of the standby server in %.
HW Ressources	Free memory (kB)	UDINT	Shows the available memory of the current workstation in kilobytes.
HW Ressources	Free memory (kB) – SB	UDINT	Shows the available memory of the standby server in kilobytes.
HW Ressources	Free disk space – database (%)	UDINT	Shows the available disk space of the current workstation in %. This value always refers to the partition where the project's workspace is located.
HW Ressources	Free disk space – database (%) - SB	UDINT	Shows the available disk space of the standby server in %. This value always refers to the partition where the project's workspace is located.
HW Ressources	Free disk space – database (kB)	UDINT	Shows the available disk space of the current workstation in kilobytes. This value always refers to the partition where the project's workspace is located.
HW Ressources	Free disk space – database (kB) - SB	UDINT	Shows the available disk space of the standby server in kilobytes. This value always refers to the partition where the project's workspace is located.
HW Ressources	Free disk space – export (%)	UDINT	Shows the amount of free disk space of the export folder configured in the project configuration in %.
HW Ressources	Free disk space – export (%) – SB	UDINT	Shows the amount of free disk space of the export folder of the standby server configured in the project configuration in %.
HW Ressources	Free disk space – export (kB)	UDINT	Shows the amount of free disk space of the export folder configured in the project configuration in kilobytes.
HW Ressources	Free disk space – export (kB) – SB	UDINT	Shows the amount of free disk space of the export folder of the standby server configured in the project configuration in kilobytes.

Net	Current server	STRING	Computer name of the server currently handling processes If the name was acquired from the hosts file, this will be the name used there. For DNS, this is the Fully Qualified Doman Name.
Net	Current standby server	STRING	Computer name of the server which is currently not handling processes. If the name was acquired from the hosts file, this is the name entered there. For DNS, this is the Fully Qualified Doman Name.
Net	Number of connected clients	UDINT	Delivers the number of clients currently connected to the server. This number also includes the standby server, if there is one.
Net	Authorization: not granted	BOOL	A binary variable that indicates that an authorization request in the network was rejected. The value of this variable is changed only for a short time and then changed back to the initial state. 0 = Request for Authorization granted 1 = Request for Authorization denied
Net	Authorization present at this computer		Shows whether there is an authorization for the current project on the local computer. 0 = No 1 = Yes
Net	Authorization: owner computer.	STRING	Shows the name of the computer that has the authorization for the currently loaded project.
Net	Names of connected clients	STRING	Delivers the names of the clients currently connected to the server. The standby server, if there is one, is also included.
Net	Net timeout (milliseconds)	UDINT	Shows the timeout in milliseconds for the zenon network as configured in the project configuration.
Net	Redundancy switch	BOOL	A binary variable that takes the value 1 for a short time when the system performs a redundancy switch between server and standby server. 0 = No redundancy switch 1 = Redundancy switch
Net	Server offline	BOOL	Indicates that the connection to the process handling server was lost. Depending on the network position of the computer, this means: Dominant Server: While it is not yet the process handling server, the value changes to TRUE if the connection to the process handling server is lost. Always FALSE after synchronization. Non-dominant Server: Changes to TRUE if the connection to the dominant server, which was the process handling server, is lost. Changes back to FALSE if the StandBy was promoted to be the process handling server. EVALUATION: Preferrably via a REMA, as the Alarm Management is also swapped and taken over by the SB at that time. The Online Container is also not suitable because the variables are re-initialized during redundancy switching. Client: Changes to TRUE if the connection to the process handling server is lost. Changes back to FALSE if the client connects to the SB computer that is now the process handling server.
Net	Server stop	BOOL	Type: BOOL, local. Indicates the regular stop of the process handling server. The value changes to TRUE if the process handling server was stopped properly. FALSE if there is a process handling server in the net. Depending on the network position of the computer, this means: Dominant Server: While it is not yet the process handling server, the value changes to TRUE if the process handling server has stopped. Non-dominant Server: Changes to TRUE if the dominant server, which was the process handling server, has stopped. Changes back to FALSE if the StandBy was promoted to be the process handling server. EVALUATION: Preferrably via a REMA, as the Alarm Management is also swapped and taken over by the SB at that time. The Online Container is also not suitable because the variables are re-initialized during redundancy switching. Client: Changes to TRUE if the dominant server has stopped. Changes back to FALSE if the client connects to the SB computer that is now the process handling server. Is also TRUE while the process handling non-dominant server changes back to be the non-process handling server.
Net	Server-Standby in data update	BOOL	A binary variable that takes on the value 1 if the server and the standby server are performing data updates after a redundancy switch. 0 = No data update 1 = Data update active
Net	Standalone/Server/Standby-Server/Client	INT	Shows the type of the local computer in the nework. -1 = Single user 0 = Client 1 = Server 2 = Standby Server
Net	Standby-Server offline	BOOL	Changes to TRUE if the connection to the currently non-process handling server is terminated unexpectedly. If there is a connection, the value is FALSE.
Net	Standby-Server stop	BOOL	Is TRUE on the process handling server, if the non-process handling server was stopped properly and if there is no connection anymore. Changes to FALSE if the non-process handling server has registered at the process handling server.
Net	Standby-Server start	BOOL	TRUE if the non-process handling server has registered at the process-handling server and if the data update was performed and th connection between the two computers is active.
Net	Switch from Server to Standby	BOOL	A binary variable that takes on the value 1 if the server becomes the standby server during a redundancy switch. 0 = registered server is available as server in the network. 1 = registered server is available as standby server in the network.
Net	Switch from Standby to Server	BOOL	A binary variable that takes on the value 1 if the standby server becomes the server during a redundancy switch. 0 = registered standby server is available as standby server in the network. 1 = registered standby server is available as server in the network.

User administration	Current authorization groups 1 Current authorization groups 2 Current authorization groups 3 Current authorization groups 4	UDINT	Available user level for the user currently logged in in zenon. This information is displayed according to the bit encoding system of the user groups. User group 0 corresponds to decimal value 2^0 = 1 User group 1 corresponds to decimal value 2^1 = 2 User group 0 and 1 corresponds to decimal value 2^0 and 2^1 = 3 etc. The 128 possible authorization groups are distributed to 4 double words with increasing value.
User administration	Wrong User Entry	BOOL	A binary variable taking on the value 1 if the login fails because of a wrong password or a wrong username. 0 = Login successful 1 = Login failed
User administration	Username	STRING	Username of the user currently logged in in zenon.
User administration	User identification	STRING	User identification of the user currently logged in in zenon.

Path	Bitmap path	STRING	Shows the path for the graphics of the active project that were inserted via the project tree. The path settings can be adjusted in the project comfiguration.
Path	Data base path	STRING	Shows the working folder of the active project.
Path	Exportpath	STRING	Shows the folder that contains the export files produced by the function management. The path settings can be adjusted in the project comfiguration.
Path	Listpath	STRING	Shows the path for the lists of the active project that were inserted via the project tree.
Path	Reportpath	STRING	Shows the path for the report files created in zenon.
Path	Videopath	STRING	Shows the path for the multimedia files of the active project that were inserted via the project tree.

Project Information	Number of reports in memory	UDINT	Shows how many reports are currently executed in the memory of zenon. The reports are initiated via the function administration.
Project Information	Blink rate (milliseconds)	UDINT	Shows the currently configured time for the blink frequency for displaying limit violations.
Project Information	Wrong set value	BOOL	A binary variable that takes on the value 1 if an invalid value leads to the failure of the set value procedure. 0 = Set value executed 1 = Set value failed
Project Information	FKT_TRACE	BOOL	Shows if function logging is activated for the current project. All locally executed functions are written into a log file. 0 = Function logging deactivated 1 = Function logging activated
Project Information	Functions on/off	BOOL	Shows the current status of the zenon function administration. 0 = Function administration inactive 1 = Function administration active
Project Information	Limit (max) for set value	STRING	Upper limit for set value input for the currently selected variable
Project Information	Limit (min) for set value	STRING	Lower limit for set value input for the currently selected variable.
Project Information	No authorization to execute function	BOOL	A binary variable that takes on the value 1 in case the current user tries to execute an action (Set value, Execute function) which he is not authorized to execute. 0 = Action execution allowed 1 = Action execution not allowed
Project Information	Project version	STRING	Shows the zenon version, for which the current project was created.
Project Information	Send Message active	BOOL	A binary variable which takes on the value 1 when the "Send Message" function is active. 0 = "Send Message" function inactive 1 = "Send Message" function active
Project Information	SERIALIZE (Pictures)	BOOL	Status of the option SERIALIZE in the zenOn6.ini file 0 = Entry SERIALIZE = 0 1 = Entry SERIALIZE = 1
Project Information	Serial Number	STRING	Shows the zenon serial number.
Project Information	Driver queue overflow	BOOL	A binary variable that takes on the value 1 if there is a queue overflow in a driver in zenon. 0 = No queue overflow occurred 1 = Queue overflow occured
Project Information	Driver queue overflow (name)	STRING	Displays the name of the driver for which the queue overflow occured. Variable is updated when system variable causes driver queue overflow".
Project Information	Variable of the last set value	STRING	Displays the name of the variable with the last successful set value action.
Project Information	Variable for set value	STRING	Displays the name of the variable that is currently open for the set value action.
Project Information	Version (SICAM 230/zenon)	STRING	Shows the currently used zenon version.
Project Information	Last open picture	STRING	Shows the name of the last open picture in zenon.
Project Information	BACK_NUMBER	UDINT	Displays the number of possible Picture back" actions. These actions can be configured in the zenon Editor.

Standard recipes and Recipegroup Manager	Last sent recipe/RGM recipe	STRING	Shows the name of the last recipe sent
Standard recipes and Recipegroup Manager	Last recipe/RGM recipe sent locally	STRING	Shows the name of the last recipe sent locally
Standard recipes and Recipegroup Manager	Last recipe group sent	STRING	Shows the name of the last recipe group sent
Standard recipes and Recipegroup Manager	Last recipe group sent locally	STRING	Shows the name of the last recipe group sent locally
Standard recipes and Recipegroup Manager	No. of Last RGM recipe sent	UDINT	Shows the recipe number of the last RGM recipe sent.
Standard recipes and Recipegroup Manager	No. of last RGM recipe sent local	UDINT	Shows the recipe number of the last RGM recipe sent locally
Standard recipes and Recipegroup Manager	Recipe/RGM recipe finished sending	UDINT	Variable gets the value 0 while a recipe is sent. Value becomes 1 after the recipe send has been finished. (After starting the Runtime, the variable also has the value 0) Values for write operation. 0 Initialization value before sending recipe 1 Write finished successfully. 2 Writing has not been executed because of a parameter error. 3 Write not completed successfully. 4 Wait for ready. 5 Write terminated because RT is being ended. 6 Timeout occured. 7 Write not executed because of an interlocking condition.
Standard recipes and Recipegroup Manager	Recipe/RGM recipe finished sending locally	UDINT	Variable gets the value 0 while a recipe is sent locally. Value becomes 1 after the recipe send has been finished. (After starting the Runtime, the variable also has the value 0) Values for write operation. 0 Initialization value before sending recipe 1 Write finished successfully. 2 Writing has not been executed because of a parameter error. 3 Write not completed successfully. 4 Wait for ready. 5 Write terminated because RT is being ended. 6 Timeout occured. 7 Write not executed because of an interlocking condition.

System info	HD-Data on/off	BOOL	A binary variable that shows whether the harddisk data recording of variables is activated in zenon. 0 = HDD management inactive 1 = HDD management active
System info	Local system variable: DWORD 1-4	UDINT	These are local variables that are not updated in the network. The values for these variables can be configured in the zenOn6.ini file, which means they can be used as constants for the local computer.
System info	Project name	STRING	Shows the name of the active project in zenon.
System info	Computer name	STRING	Shows the name of the local computer.
System info	Runtime data directory not available	BOOLE	Checks whether the data directory of the Runtime is available. Upon a negative result, the Runtime will no longer try to perform read or write access on the directory. The ring buffers of the AML/CEL/HDD management will not be closed. The Runtime will no longer check the availability of the folder. As soon as the directory is available again, the Runtime will have to be restarted again.

Performance Statistics Network	Sent packets count	UDINT	Accumulated number of sent network packets. Set value function initializes the counter.
Performance Statistics Network	Received packets count	UDINT	Accumulated number of received network packets. Set value function initializes the counter.
Performance Statistics Network	Sent packets size	UDINT	Accumulated size of sent network packets. Set value function initializes the counter.
Performance Statistics Network	Received packets size	UDINT	Accumulated size of received network packets. Set value function initializes the counter.
Performance Statistics Network	Sent packets count / s current	UDINT	Current number of sent network packets per second. Set value function initializes Min and Max.
Performance Statistics Network	Sent packets count / s minimum	UDINT	Current minimum number of sent network packets per second.
Performance Statistics Network	Sent packets count / s maximum	UDINT	Current maximum number of sent network packets per second.
Performance Statistics Network	Received packets count / s current	UDINT	Current number of received network packets per second. Set value function initializes Min and Max.
Performance Statistics Network	Received packets count / s minimum	UDINT	Current minimum number of received network packets per second.
Performance Statistics Network	Received packets count / s maximum	UDINT	Current maximum number of received network packets per second.
Performance Statistics Network	Sent packets size / s current	UDINT	Current size of sent network packets per second. Set value function initializes Min and Max.
Performance Statistics Network	Sent packets size / s minimum	UDINT	Current minimum size of sent network packets per second.
Performance Statistics Network	Sent packets size / s maximum	UDINT	Current maximum size of sent network packets per second.
Performance Statistics Network	Received packets size / s current	UDINT	Current size of received network packets per second. Set value function initializes Min and Max.
Performance Statistics Network	Received packets size / s minimum	UDINT	Current minimum size of received network packets per second.
Performance Statistics Network	Received packets size / s maximum	UDINT	Current maximum size of received network packets per second.
Performance Statistics Network	Received packets duration average	UDINT	Average of the processing duration for received network packets. Set value function initializes Counter, Min and Max.
Performance Statistics Network	Recevied packets duration minimum	UDINT	Minimum of the processing duration for received network packets.
Performance Statistics Network	Received packets duration maximum	UDINT	Maximum processing time for received network packets.

Performance statistics driver	Received value lists count / s current	UDINT	Current number of received value lists per second. Set value function initializes Min and Max.
Performance statistics driver	Received value lists count / s minimum	UDINT	Current minimum number of received value lists per second.
Performance statistics driver	Received value lists count / s maximum	UDINT	Current maximum number of received value lists per second.
Performance statistics driver	Received values count / s current	UDINT	Current number of received values per second. Set value function initializes Min and Max.
Performance statistics driver	Received values count / s minimum	UDINT	Current minimum number of received values per second.
Performance statistics driver	Received values count / s maximum	UDINT	Current maximum number of received values per second.
Performance statistics driver	Received value lists duration average	UDINT	Average of the processing duration for received value lists. Set value function initializes Counter, Min and Max.
Performance statistics driver	Received value lists duration minimum	UDINT	Minimum value of the processing duration for received values.
Performance statistics driver	Received value lists duration maximum	UDINT	Maximum value of the processing duration for received value lists.
Performance statistics driver	Received values duration average	UDINT	Average of the processing duration for received value lists. Set value function initializes Counter, Min and Max.
Performance statistics driver	Received values duration minimum	UDINT	Minimum value of the processing duration for received values.
Performance statistics driver	Received values duration maximum	UDINT	Maximum value of the processing duration for received value lists.
Performance statistics driver	Sent requests count	UDINT	Accumulated number of sent requests. Set value function initializes the counter.
Performance statistics driver	Sent set-values count	UDINT	Accumulated number of sent set-values. Set value function initializes the counter.