Vacon NX Series Applications Manual
Also see for NX series: User manualUser manualApplications manualMaintenance manualOperating guide
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R3.5 TORQUE REFERENCE 6 (3.5)Define here the torque reference within -300.0…300.0%.9.2 MASTER/FOLLOWER FUNCTION (NXP ONLY)The Master/Follower function is designed for applications in which the system is run byseveral NXP drives and the motor shafts are coupled to each other via gearing, chain, beltetc. It is recommended that the Closed Loop control mode be used.The external Start/Stop control signals are connected to the Master drive only. Speed andtorque references and control modes are selected for each drive separately. The Mastercontrols the Follower(s) via a SystemBus. The Master station is typically speed-controlledand the other drives follow its torque or speed reference.Torque control of the Follower should be used when the motor shafts of the Master andFollower drives are solidly coupled to each other by gearing, a chain etc., so that no speeddifference between the drives is possible. Window control is recommended to keep the speedof the follower close to that of the master.Speed control of the Follower should be used when the demand of speed accuracy is lower.In such cases, use of load drooping is recommended in all drives to balance the load.9.2.1 MASTER/FOLLOWER LINK PHYSICAL CONNECTIONSIn figures below, the master drive is located on the left side and all others are followers. Themaster/follower physical link can be built with OPTD2 option board. See VACON® NX I/OBoards User Manual for further information.9.2.2 OPTICAL FIBRE CONNECTION BETWEEN AC DRIVES WITH OPTD2The OPTD2 board in the Master has the default jumper selections, i.e. X6:1-2, X5:1-2. For thefollowers, the jumper positions have to be changed: X6:1-2, X5:2-3. This board also has aCAN communication option that is useful for multiple drive monitoring with NCDrive PCsoftware, when commissioning Master Follower functions or line systems.Fig. 91: System bus physical connections with the OPTD2 boardFor information on the OPTD2 expander board parameters, see VACON® NX I/O Boards UserManual.PARAMETER DESCRIPTIONS VACON · 353LOCAL CONTACTS: HTTP://DRIVES.DANFOSS.COM/DANFOSS-DRIVES/LOCAL-CONTACTS/ 9 |
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