The following NA System Variables will be available for the user: These can be accessed within NA project like any other GLOBAL VARIABLE.
|
System Variable Name |
Description |
Data Type |
Read Only? |
|
_HMI_Brightness |
The current backlight brightness. This is a control variable, so setting it to a valid value will cause the current backlight brightness to be changed. |
Integer |
Read-Write |
|
_HMI_IsScreenSaverActive |
Whether the screen saver is active. The ActivateScreenSaver action has to be used to make the screen saver active. |
Boolean |
Read-Write |
|
_HMI_DateTime |
The current local time, read from the internal clock. The SetDateTime action has to be used to adjust the time. |
Date |
Read-Only |
|
_HMI_CanEjectSDCard |
Whether the power for SD memory card is currently supplied. To remove the SD memory card, the EjectSDMemory action has to be used. |
Boolean |
Read-Only
|
|
_HMI_RunSignal |
Whether HMI is operating normally. The value of this variable should be toggled periodically while HMI is normal. Even when displaying any menu or a message box, this variable should be toggled. |
Boolean |
Read-Only |
|
_HMI_IsPageSwitching |
Whether the page is being switched. When switching a page, this variable should be turned ‘ON’. After the operation is complete, this variable should be turned ‘OFF’. |
Boolean |
Read-Only |
|
_HMI_IsDataInput |
Whether any data input object on page is being used to enter data. When any data input object on page has a focus for data input, this variable should be turned ‘ON’, otherwise it should be turned ‘OFF’. |
Boolean |
Read-Only |
|
_HMI_IsBatteryLow |
The HMI internal battery voltage state. When the voltage level is below the warning threshold, this variable should be turned ‘ON’, otherwise it should be turned ‘OFF’. |
Boolean |
Read-Only |
|
_HMI_CurrentPage |
The name of the currently displayed page. This is a control variable – setting it to a valid page will cause the displayed page to be changed. Invalid page names will be ignored. |
String |
Read-Write |
|
_HMI_Millisecond |
Milliseconds, based on the system clock value. |
Integer |
Read-Only |
|
_HMI_Second |
Seconds, based on the system clock value. |
Integer |
Read-Only |
|
_HMI_Minute |
Minutes, based on the system clock value. |
Integer |
Read-Only |
|
_HMI_Hour |
Hours, based on the system clock value. |
Integer |
Read-Only |
|
_HMI_RAMTotal |
The amount of RAM in the NA |
Integer |
Read-Only |
|
_HMI_RAMInUse |
The amount of RAM currently in use in the NA |
Integer |
Read-Only |
|
_HMI_ManagedRAMInUse |
The amount of Managed RAM in use the NA |
Integer |
Read-Only |
Alarm Variables
|
System Variable Name |
Description |
Data Type |
Read Only? |
|
_HMI_AlarmCount |
Total number of alarms raised since the beginning of the current runtime session |
Integer |
Read-Only |
|
_HMI_AlarmsRaised |
Total number of alarms currently in the raised state |
Integer |
Read-Only |
|
_HMI_AlarmsNotAck |
Total number of alarms currently requiring acknowledgement (whether raised or cleared) |
Integer |
Read-Only |
|
_HMI_AlarmsRaisedNotAck |
Number of currently raised alarms requiring acknowledgement |
Integer |
Read-Only |
|
_HMI_AlarmsClearedNotAck |
Number of alarms cleared but still requiring acknowledgement |
Integer |
Read-Only |
Security Variables:
|
System Variable Name |
Description |
Data Type |
Read Only? |
|
_HMI_CurrentUserName |
Contains the name of the currently logged in user. |
String |
Read-Only |
|
_HMI_CurrentUserRole |
Contains the security role of the currently logged in user (e.g. Administrator) |
String |
Read-Only |
