User manual CONTROL TECHNIQUES MENTOR II

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[. . . ] EF User Guide Mentor II DC Drives 25A to 1850A output Part Number: 0410-0013-14 Issue Number: 14 www. controltechniques. com Safety Information Persons supervising and performing the electrical installation or maintenance of a drive and/or an external Option Unit must be suitably qualified and competent in these duties. They should be given the opportunity to study and if necessary to discuss this User Guide before work is started. The voltages present in the drive and external option units are capable of inflicting a severe electric shock and may be lethal. The Stop function of the drive does not remove dangerous voltages from the terminals of the drive and external Option Unit. [. . . ] Alters parameters 05. 12 to 05. 15. Set by the Start-up Autotune parameter 05. 09. This parameter allows the current loop to follow very closely a stepchange in current. If set too high, there will be an overshoot. If set too low, the new current value will be achieved unduly slowly. Value of 05. 13 Gain applied = --------------------------------------256 05. 10 Reduced endstop RW 0 or 1 Bit 0 0 to 255 05. 14 Continuous integral gain RW Uni 16 The endstop allows the armature voltage to rise, during regeneration, to 1. 16 x supply voltage. On very soft supplies the endstop may be too close to the crossover point. Setting 05. 10 = 1 increases the safety margin but reduces the maximum regenerated armature voltage to 1. 05 x supply voltage. Setting this parameter may be necessary in series 12 pulse systems. Set by the Start-up Autotune parameter 05. 09. Its value will depend on the motor time-constant. Increasing the value of 05. 14 will improve the response of the current loop but at the risk of instability. If this parameter is set too low an error between the value of the `Current Demand' and the `Current Feedback' can result. Value of 05. 14 Gain applied = --------------------------------------512 NOTE N This parameter is not set by the continuous autotune routine. Mentor ll User Guide Issue Number: 14 59 www. controltechniques. com 05. 15 Motor constant RW 0 to 255 Uni 25 05. 20 Enable direct firing angle control RW 0 or 1 Bit 0, disabled This parameter is used to scale the current demand such that the control loop correctly predicts the firing angle in the discontinuous current region. It is set automatically by the Start-up Autotune parameter 05. 09. When enabled, the firing angle 05. 03 is controlled by the value of the post-ramp reference 02. 01. This mode is valuable for system diagnosis, particularly where instability is present, since it allows the drive to operate without the influence of either the speed loop or the current loop, thereby eliminating their effect upon the system. NOTE 05. 16 Reserved RW N This facility must be used with caution. When the reference is 02. 01, there is no protection against excessive acceleration, output voltage or current other than the instantaneous overcurrent trip. Also take care to reset 05. 20 = 0 after completion of tests. This parameter is reserved. 05. 17 Inhibit firing RW 0 or 1 Bit 0, enabled 05. 21 Enable bridge 2 lockout RW 0 or 1 Bit 0, disabled If set to 1, disables thyristor (SCR) firing (both bridges), and resets acceleration and deceleration ramps. Requires to be set only for parallel 12-pulse 4Q system installations comprising two drives which are to share load, to prevent one drive changing bridges while the other is still conducting. 05. 18 Enable standstill logic RW 0 or 1 Bit 05. 22 Disable adaptive control RW Bit 0, enabled 1, enabled 0 or 1 Setting 05. 22 = 1 disables adaptive control. When adaptive control is enabled (default status) the current loop employs two different algorithms, one of which applies high gain in the discontinuous-current region. This is unsuitable for some applications, such as non-motor loads, for which adaptive control should be disabled. When enabled, causes the firing angle to be fully phased back when the drive has received a STOP command and when the speed falls below 0. 8% of maximum speed. After a short time delay, the thyristor (SCR) firing is stopped also. This prevents creep and is used in applications in which there is no requirement to maintain motor torque at standstill. This parameter will need to be disabled if torque control is selected. 05. 23 05. 19 Standstill mode RW 0 or 1 Bit Enable 1 - quadrant series 12 - pulse RW 0 or 1 Bit 0, disabled 0 05. 19 = 0 Standstill logic is enabled after STOP command or zero reference. 05. 19 = 1 Standstill logic enabled after STOP command only. [. . . ] 4 CSA C22. 2 0-M1982 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 EN 61000-4-2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107 EN 61000-4-4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107 EN50082-1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [. . . ]

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