R&M Materials Handling VARIABLE SPEED CONTROLS ControlMaster Plus Service Manual - Manual (Page 44)

R&M Materials Handling, Inc.
4501 Gateway Boulevard
Springfield, Ohio 45502
P.: (937) 328-5100
FAX: (937) 325-5319
44/83 R&M Materials Handling, Inc. reserves the right to alter or amend the above information without notice.
5 SPEED SUPERVISION SETTINGS
SSU is a hoist motion speed supervision unit, which reads the pulse frequency from the hoist motor sensor bearing,
encoder or pulse sensor. This pulse frequency is compared with a fixed oscillator frequency and inverter frequency
reference. As a result of frequency comparison, there are three different speed supervision functions available:
-
overspeed supervision (rush control)
- stall supervision
- speed difference supervision
Overspeed supervision (F61) is totally implemented by hardware.
Switches S2-2 and S2-3 divide the full frequency range to four frequency areas.
Selected frequency area is the same for normal and ESR speeds.
The four frequency areas are each divided to lower and upper frequency ranges
Switch S2-1 selects the frequency range at normal speed.
Switch S2-4 selects the frequency range at ESR speed (Extended Speed Range).
The exact tripping frequency level is selected with rotary switches.
Switch S1 sets the tripping level at normal speed (value shown in V4.8.1).
Switch S3 sets the tripping level at ESR speed (value shown in V4.8.2).
Overspeed tripping levels are shown at display as % of the nominal speed. The overspeed setting should be 15-25%
above the full speed.
Switches S2-2 and S2-3 select range for overspeed detection level. Range of detection level is the same for both, normal
and ESR (Extended Speed range) use.
Fine adjustment for normal use is done by rotary switch S1 and switch S2-1.
Fine adjustment for ESR use is done by rotary switch S3 and switch S2-4.
Overspeed detection levels are shown at display panel as % of nominal speed. Overspeed setting should be 15-25%
above the full speed.
Adjusted overspeed detection level for normal use is shown in parameter V4.8.1.
Adjusted overspeed detection level for ESR use is shown in parameter V4.8.2.
Speed difference supervision (F62) compares the motor actual speed (= pulse frequency) with Drive frequency
reference. In practice this means that the motor slip is measured and if that exceeds a limit, supervision stops the motion.
Stall supervision (F63) stops the motion if there are no pulses coming from the sensor when the brake is open (K7
energised).
SSU relay test (F64): SSU Relay is tested in every power up. Driving is prevented if fault has been detected.
SSU Watchdog fault (F65): Communication between SSU board and control board is tested once in 50ms. Fault will be
detected if there is communication error. When a fault is detected the drive is stopped.
SSU Overspeed Limit (F66): maximum setting of overspeed limit is 1.4
×
maximum speed of direction S2. Fault will be
detected if overspeed limit is set over that value. When a fault is detected the drive is prevented.
2.5 Standard settings
2.5.1 Settings for sensor bearing
The table below indicate the SSU settings for standard cases. Motors with nominal frequency 100Hz or 120Hz are
equipped with bearing sensor. After adjustment, check that parameters V 4.8.1 Overspd Lim 1 and V 4.8.2 Overspd Lim
2 have value between 115% and 125%.
Max Freq S2 is normally set to 120Hz, also when nominal frequency and Max freq S1 are 100Hz. Check that parameters
P 2.2.2. Motor Nom Freq and P 2.2.3. Motor Nom Speed have correct values from motor type plate.
Settings for sensor bearings
Power class 002 – 005 002 – 005 007 – 011 015 - 055