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<< Click to Display Table of Contents >> Data Logging |
  
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<< Click to Display Table of Contents >> Data Logging |
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Data logging functions in SpecView are in two parts:
1 Specifying which items to log to the hard disk
2 Using the logged data to create reports and replay logged data on screens (GDWs) using Historical Replay. (Historical Replay is a dongle option.)
NOTE: Data Logging is a background function. Variables do not have to be on an open screen (GDW) to be logged. Conversely, a variable on an open GDW may not be logged.
Three types of data may be logged:
| • | Variables This is the saving of the values of all variable types (numbers, booleans, text, dates, times, etc.). Both instrument variables and user variables can be logged |
| • | Events SpecView records actions as specified in Event Logging |
Data logging is active by default (at a rate of 60 secs) when SpecView is started. To de-activate use Preferences - Logging or adjust the Logging Rate to zero.
The instrument variables that are logged by default have been pre-configured by SpecView as part of the instrument's definition.
Typically for control instruments, the variables that are logged by default are: Process Value, Set Point and Output Power.
For indicators or data acquisition modules, just the Process Value is logged by default.
To see which variables are being logged see the 'L' column of the Variables List:
The logged data is used for two purposes:
| 1. | Historical Replay of a screen (GDW) |
| 2. | Creating a text file Log Report which can be stored on any drive/folder in your system. Log Reports can also be generated from the Remote computer, which is detailed in Log Reports from the Remote. |
NOTE: If an item is not available when using Historical Replay or when creating a log report it is probably not included in logging. Add the variable to logging as described in Data logging - Variables
Read Disk Space for Logging for file size details
Changing the Logging Rate