text: <s>[INST] In 1397 AB make DC Drive, how to switch off the field voltage while the DC motor is in stop mode... Presently, in our DC Drive-Motor system when the DC motor stops, the field voltage is continuously coming 220-230VDC.. I need to switch off the field voltage during the DC motor stops..And the field voltage gets on when DC motor starts.. So i need to know which parameter(s) in 1397 DC Drive had to set for the above need..Please help me... [/INST] The field voltage should only be removed when the main power is removed. See the following note from the manualBypassing any field fault parameters will negate the safety of the installation. ATTENTION: It is imperative that the Drive NOTBE STARTED with the field windings in theun-powered condition. Failure to follow theseprocedures may result in a machine malfunction and/orpersonal injury.The output voltage and current of both the enhancedfield supply and the regulated field supply aredetermined by the values contained in set-up parameters \\n </s>