Server Preferences - Audit Trail

Acquire™ downloads the audit trail from each flowcomputer on the system. This preference screen allows you to customise the audit trail settings.

Field	Description
Audit Event Polling Enabled	Allows you to suspend polling for audit events.
Sample Period (Seconds)	The 'Sample Period' sets how ofter the flowcomputers should be polled for new events. Increasing this value will lessen the load on the flowcomputers but will increase the amount of time between an event being raised on the flowcomputer and being picked up by Acquire™. Similarly decreasing the sample time will improve the response time to an event being raised and it being picked up by Acquire™, but this will put a slight overhead on the flowcomputer. When Acquire detects a new event it will download the new event from the flowcomputers audit trail. The default audit trail sample period is 5 seconds.
Days To Keep Audit Events	Acquire™ maintains a database of all audit trail events. By default it will keep the audit trail within the database for 30 days. After this time the audit events are removed from the database. Note: Acquire also writes the Audit Events to a text file on the disk. This audit trail can be found in /Acquire/Logs/Audit Trail. An audit trail file is kept for each day and is never deleted. These files can be archived on to a CD and safely removed from the system
Audit Modbus Server Writes	Some PLCs or Modbus Clients write their values to Acquire™ even if the value has not changed. This can generate a huge amount of meaningless audit event data. To filter out this data unclick the 'Audit Modbus Server Writes' checkbox. By default this option is enabled.