DrivelinK Network Analyser (DNA)

Transcription

1 EF User Guide DrivelinK Network Analyser (DNA) Part Number: Issue Number:

2 General Information The manufacturer accepts no liability for any consequences resulting from inappropriate, negligent or incorrect installation or adjustment of the optional operating parameters of the equipment. The contents of this guide are believed to be correct at the time of printing. In the interests of a commitment to a policy of continuous development and improvement, the manufacturer reserves the right to change the specification of the product or its performance, or the contents of this guide, without notice. All rights reserved. No parts of this guide may be reproduced or transmitted in any form or by any means, electrical or mechanical including photocopying, recording or by an information storage or retrieval system, without permission in writing from the publisher. Copyright June 00 Control Techniques Drives Ltd Issue Code:

3 Contents General description... Installation and set-up.... MultiAx.... M Ax... SLM DrivelinK Network Analyser User Guide Issue Number:

4 General description The ADrivelinK Network Analyser is a simple hand held device that can be connected into any Adata network to convert selected data to an analog equivalent for display on an oscilloscope. It is typically used to display speed, current or speed error in the servo axis under investigation. A number of bit SLM parameters can be selected by the host for output, and these can be scaled over a range of 0 to :. The output is ±0 bit resolution (±0V) which is also adequate for tuning purposes. The host controller selects the parameters and scaling and must write to a Drivelink register cyclically to initiate each data transfer. When used with M'Ax servo drives, the output bandwidth is the same as the network i.e. khz which is more than adequate for servo loop tuning. The host controller can select to use a lower sample rate. The DNA is supplied in a rugged aluminium case 0 x x mm suitable for placing adjacent to the drive axis under investigation, and is connected into the network between the drive and motor. Three cables are supplied with the DNA, one umbilical cable for MultiAx, and a choice of RJ or -way high density D-type for M'Ax. The end of the umbilical connected at the drive has a short tee cable from the connector block so as not to foul other adjacent plugs etc. on the drive. Figure - DNA module SLM DrivelinK Network Analyser User Guide Issue Number:

5 Figure - DNA with MultiAx umbilical cable, M Ax RJ cable and M Ax -way high density cable* *Clockwise from top left of Figure -: M Ax -way high density terminated cable, M Ax -way high density terminated cable, DNA, MultiAx umbilical cable. NOTE The DNA is a silent listener and cannot put data onto the network or interfere with the data packets in any way, The user is assured that the application will be unaffected by the insertion of the DNA. The integrity of the EMC screening of the original field wiring and grounding is retained by routing cable screens and drain wires appropriately, so that the application's EMC performance is unlikely to be affected by the insertion of the DNA. The DNA is provided with power on switch and green LED, and should be connected into a network whilst powered off. For the present release, The outputs are provided as channels of analog +/0V signals and common 0V. Other I/O, status LED and the flash card memory stick are not supported in this version. After power on, in M'Ax standalone mode only, the default output is the incremental position (R register) which is scaled 0- as -V to 0V and will be seen as a ramp if the axis is rotating at constant speed. In host mode, the outputs remain at 0V until the motion controller has set up the data and in writing to the correct DrivelinK register cyclically, as described below. The DNA using data channel output conflicts with the M'Ax encoder simulation output and must not be used with this function. SLM DrivelinK Network Analyser User Guide Issue Number:

6 Installation and set-up WARNING To ensure safety in the event of a drive failure, the DNA unit should be suitably grounded at the terminal provided. Ensure the DNA is grounded and the drive is de-energised before SLM communication cables are plugged in.. MultiAx. Power off drive axis and mount the DNA in a suitable location in the panel.. Connect the ground terminal to a suitable cabinet ground. Unplug the axis SLM cable and connect the umbilical lead in circuit.. Plug in the umbilical to the DNA, power switch off.. Make scope connections to the DNA analog output terminals to an isolated (battery) scope or other so as not to ground the 0V common.. Power up the controller & drive in the normal way and confirm that operation is as normal.. Switch on the DNA; power LED will light.. Program the host controller to write the required parameter address to SLM Pr for analog output and SLM Pr 9 for analog output. e.g. If the speed is to be monitored on analog output, write to SLM Pr 9. Refer to Table. for the monitoring parameters available. Table. Parameter Required SLM Parameter Number The value to write on to SLM parameter /9 Speed 0x0 [] SLM PCB Temperature 0xee [] Revolutions 90 0xF [9] Loop Error LSW 0x0e [0] I t accumulator 0x [] Extended Position 0x0 [0] Current Demand 0xb [0] bit position (default in M Ax standalone mode) 0x0 [] *Reference - Feedback - 0x90 [9] *Reference - 0c [] *Parameters shown in grey are reserved for advanced use. Contact CT Technical Support for information 9. The host controller also must write to DrivelinK Register R (Address 09) at the required sampling rate to enable the T/T communication channel and initiate each data transfer. 0. Default scaling is ±0V = ±. This means that full range of the parameter in SLM will give full range output. For example, ±00% current is ±0V; Whereas ±rated speed is only ±V since the ± range covers ±0rpm for a 000rpm motor.. If other scaling is required, set up the scaling multiplier by writing to SLM Pr (to scale Output ) and Pr (to scale Output ). SLM DrivelinK Network Analyser User Guide Issue Number:

7 The scaling multiplier has the following effect: If Pr / Pr is between 0 to then Multiplier is Pr / Pr This scales over the range 0 to. 9 If Pr / Pr is between 9 to then Multiplier is Pr / Pr This scales over the range 0. to :, with giving default of :. NOTE Using or sets the scaling to zero. This is graphically shown in Figure -. Figure - Scaling Multiplier Scaling Multiplier *Note that two outputs are exceptions to this scaling. Resolution is bits, so that count is in ^ of a revolution. To use this at DNA output, to show speed ripple, as difference between reference and feedback, set: SLM Pr 9 = 9 Set scaling for x gain: SLM Pr = so that ±9 = ±0V This gives.mv/bit resolution. Ripple_In_Counts = 9 Measured_Ripple_voltage 0 Ripple_In_rpm = Ripple_In_Counts Measured_Ripple_voltage x Ripple_In_percent = Ripple_In_rpm Demand_rpm By using the Fourier Transform of the DNA output, the frequency components are identified and frequencies of interest are separated from noise.. M Ax. Power off drive axis and mount the DNA in a suitable location in the panel.. Connect the ground terminal to a suitable cabinet ground. SLM DrivelinK Network Analyser User Guide Issue Number:

8 . Using either the RJ terminated cable or -way high density D-type, connect between the DNA and the drives MC terminal as shown below. Digital I/O Output Input Output Input Output Input Output Input Input Input 0 9 DIGITAL I/O V user supply Input Input Digital I/O B output A output Standard-precision analog input 9 0 SIM ENC Analog output 0V Analog output Z output Cable shields Frequency input Quad. A input Direction input Quad. B input +V SLM-and-user back-up supply Touch-trigger input 0 9 V user supply High-precision analog input STANDALONE Non-inverting input/output Inverting input/output B Status-relay contact 9 0 +V SLM-and-user back-up supply V SLM supply Drive-status supply B TX EIA TX\ V user supply RX RX\ EIA MC/EIA SLM MC - -way H/D D-type Drive-status supply B V user supply MC MC - RJ V loop supply Drive-status output Multidrop B MULTIDROP OUT TXD EIA RXD V loop input Drive-status input Multidrop B MULTIDROP IN/PC. Make scope connections to the DNA analog output terminals to an isolated (battery) scope or other so as not to ground the 0V common.. Power up the controller and drive in the normal way and confirm that operation is as normal.. Switch on the DNA; power LED will light.. Program the host controller to write the required parameter address to SLM Pr for analog output and SLM Pr 9 for analog output. e.g. If the speed is to be monitored on analog output, write to SLM Pr 9. Refer to Table. for the monitoring parameters available.. The host controller must also write to DrivelinK Register R (Address 09) at the required sampling rate to enable the T/T communication channel and initiate each data transfer. 9. For scaling information, refer to MultiAx set-up, points 0 to. SLM DrivelinK Network Analyser User Guide Issue Number: