# Wrench Production Loosening Parameters

The parameters shown in the tables are available if one of the STwrench strategies are used. There are several combinations of strategies. Some of the parameters are only available for certain strategies and may not be visible in other strategies.

Parameter rules are automatically checked. If a violation occurs, the error indicator is displayed beside the incorrect parameters. Select the error indicator to display more information about the error.

Switching between strategies can result in the error indicator being shown. This indicates that the chosen combination is invalid, and needs to be corrected.

For more information about the STwrench, see the STwrench User Guide (printed matter number 9836 4134 01).

Parameters in the STwrench loosening step
Parameter name | Condition | Description | Default value
--- | --- | --- | ---
Loosening limit |  | If this parameter is set to a value greater than 0, Power Focus checks if a negative torque exceeding this value is applied during the tightening. In that case, the overall status of the tightening is marked as Not OK. This function is started when the wrench reaches the Cycle Start (before starting the tightening, a loosening is allowed and does not produce results). This function is used to detect unwanted loosening at the end of a tightening (for instance, when the wrench is disengaged from the joint). | 0 Nm