ClearSCADA

compared with
Version 4 by Brad Shaw
on Aug 24, 2017 23:27.

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ClearSCADA contains a number of objects which can be used to store a value, the following table documents the differences between them to help decide which object type should be used

||Property||Internal Point||Database Variable||Parameter||Comment|| || Property || Internal Point || Database Variable || Parameter || Comment ||
|Database icon| | Database icon | Dark Grey\\ | Yellow | Light Grey | |
| Which data steam are the values stored within?|Data stream|Data stream|Config stream|The within? | Data stream | Data stream | Config stream | The choice of which steam is important should you export/import the object via SDE. SDE files only contain the config stream so on import the internal point and database variable will have no value |
| Permission required to change value|Control|Control|Configure|Generally value | Control | Control | Configure | Generally operators will have the Control permissions but not Configure, this can be used to control who can change the value |
|Alarms|Analogue | Alarms | Analogue and digital: Yes\\
String and Time: No|No|No| | No | No | |
|Historic|Analogue | Historic | Analogue and digital: Yes\\
String and Time: No|No|No| | No | No | |
| Value change logging | Standard event logging | Standard event logging | Config Changes table, if enabled |
| Includes in count for licensing?|Yes|No|No| | Yes | No | No | |
| Included data types|Analogue types | Analogue\\
digital
string
digital\\
string\\
time|Lots, time | Lots, including (array for some):\\
Boolean,
byte
colour (RGB)
double
floats
strings
time
variants|Postal address
double
grid reference
object link
parameter table
string| |
Boolean,\\
byte\\
colour (RGB)\\
double\\
floats\\
strings\\
time\\
variants | Postal address\\
double\\
grid reference\\
object link\\
parameter table\\
string | |
| Triggers logic on-input changed | Analogue and digital: Yes\\
String and Time: No|No|No| | No | No | |