Each time an operator performs a control action (i.e. changes the value of an analog output (VTS), digital output (VTS), or analog control (VTScada) using a corresponding drawing method such as a SetValue Button, SetValue Hotbox, Numeric Entry field, or Slider), the data is logged to the Alarms.log file in the application's directory.
Note: To view the contents of the Alarms.log file(s), navigate to the Alarm page and click the History button.
If the message is less than 80 characters, the following format is used:
<WorkstationName> <Username> Changed <TagName> <TagDescription> from <PreviousTagValue> to <NewTagValue>
For example:
[Workstation19] [JSmith] Changed DO_2 "Motor Power" from 0 to 1
If the message exceeds 80 characters, the tag description is shortened, and the following format is used:
<WorkstationName> <Username> set <TagName> <TagDescrip…> to <NewTagValue>
For example:
[Stn1] [MCasagrande_Faulkner] set DigitalOutput_16_02 "Pump 16 Controller…" to 0
If the message exceeds 80 characters, resulting in the shortened tag description being truncated to less than 4 characters, the tag description is removed, and the following format is used:
<WorkstationName> <Username> set <TagName> to <NewTagValue>
For example:
[Workstn5] [NLeBlanc] set AO_3 to 23
Note: A set of 3 Config.ini [LABEL] section variables can be used to change the prepositions that are concatenated with the UserName, TagName etc. to form the operator control entry in the History alarm list. These variables are identified in Customizable Labels Related to the Default Alarm Page.
If you wish to turn operator logging off, or change the priority and area logged for operator control actions, you can use a set of specialized Config.ini variables as identified in Config.ini [SYSTEM] Section Variables for Operator Logging.