YASKAWA F7 Technical Manual

Also see for Varispeed f7: Connection manual Programming manual User guide Instruction manual User manual

Contents

Date: 10/15/07, Rev: 07-10 Page 5 of 12 TM.F7.03An F7 with the Safe-Off option has all the functionality of the conventional F7.The Safe-Off option does not add or modify any parameters, monitors, multifunction input codes, multifunctionoutput codes, faults or alarms.The blocking function of Safe-Off terminals BB and BB1 is fully implemented in hardware. Nevertheless, the drivesoftware still monitors BB and BB1 inputs and treats them as a conventional External Baseblock command likeMultifunction Inputs programmed with codes “8” or “9.” When the drive receives a Baseblock command (eithersoftware or hardware implemented), it turns off the output devices (IGBTs) and no output voltage is applied to themotor. The motor coasts. The drive can be forced into a baseblock state by either closing a digital input configuredfor “Ext Baseblk N.O.” (H1-0x= 8) or opening a digital input configured for “Ext Baseblk N.C.”(H1-0x= 9) or by opening either Safe-Off input BB or BB1.The time from opening either Safe-Off input until the drive output is switched off is less than 10 milliseconds.When the Baseblock command is removed, the drive immediately performs the Speed Search function to catchthe coasting (or stopped) motor and ramp it back to the commanded speed. Parameter b3-01 determines whichmethod of speed search (either Current Detection or Speed Estimation) is used. See the F7 Drive ProgrammingManual TM.F7.02 for complete descriptions of Baseblock and Speed Search functions.4.0 Limitations5.0 Related Parameters and Functions6.0 Function Description