Variable torque limiting Q1

The additional function "Variable torque limit Q1" lets you specify the torque via the application in 0.1% × nominal motor torque. The torque is limited to the "Minimum torque" configured in the Torque limit configuration menu. In addition, speed and lag error monitoring can be deactivated/activated via control bits. Note that deactivation or reactivation is only completed once the status bits report the appropriate state. Depending on the capacity utilization of the parameter channel used for this purpose, this will take from 50 ms up to 2000 ms. Therefore, disabling and enabling the monitoring functions within a single cycle is not suitable for a fast process cycle. For fieldbus operation, the process data length is extended by two process data words.

Note that lag error monitoring cannot be deactivated in operating mode 100, Jog – position-controlled (FCB 20). Therefore, use operating mode 101, Jog mode – speed controlled (FCB 05).

Note that variable torque limiting is also active in the following drive functions if the "Use torque limits from profile value connection" parameter is activated in the Torque limit configuration menu.

• FCB 02 Stop default (no operating mode selected – value "0")
• FCB 13 Stop at application limit (enable/application stop, fault response)
• FCB 14 Emergency stop (enable/emergency stop, fault response)
• FCB 26 Stop at user-defined limits (when changing the operating mode)

If the variable and minimum torque limit is set to 0%, the torque application limit defined in the Limit values configuration menu is effective.