RSView Supervisory Edition Installation Guide

Using the DataLogSnapshot command
You can record tag values using the DataLogSnapshot command with
these parameters: or * (asterisk).
DataLogSnapshot (where is a data log
model name) records tag values for all tags in the specified model at the
instant the command is executed.
DataLogSnapshot * records tag values for all tags in all running models
at the instant the command is executed.
You can use this command anywhere you can issue an RSView
command or macro. For example, enter the command as the action for
an event.
Operators can also use this command at run time. For details, see
“Providing a way to log on demand” on page 13-15.
Example: Creating an event for on-demand logging
To create an event that will trigger logging when an alarm occurs:
1. Click the On Demand log trigger.
2. Open the Event editor. Create an expression such as:
If alm_in_alarm(motor_fault) and new_batch_started then 1 else 0
3. In the Event editor’s Action field, type
DataLogSnapshot where ‘component’ is the name of
the data log model.
When the tag called motor_fault goes into alarm, and the tag called
new_batch_started is 1, the DataLogSnapshot
command runs. All tags in the model will then be logged (not just the
tag in alarm).
13–14 RSView Supervisory Edition User’s Guide