Set logging frequency

The InTouch HMI writes entries to the historical log file based upon two conditions:

• The InTouch HMI writes an immediate log entry whenever a tag value changes by an engineering unit value greater than its log deadband value.

• The InTouch HMI writes the current values of all logged tags at a fixed interval. The default fixed interval is 60 minutes.

Add two parameters to the INTOUCH.ini file to change the interval.

• ForceLogging

  ForceLogging specifies the length of the fixed logging interval in minutes. ForceLogging can be set to a value from 5 to 120. The default is ForceLogging=60.

• ForceLogCurrentValue

  ForceLogCurrentValue forces the InTouch HMI to write log entries for all logged tags even if the current values are less than or equal to their log deadband ranges. The default is ForceLogCurrentValue=0.

In the following example, current tag values are written to the Historical Log file at 15 minute intervals or when the value of the tag changes:

ForceLogging=15

ForceLogCurrentValue=1