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AMCI 1761H User Manual

Intelligent resolver interface module
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1761H
Intelligent
Resolver Interface
Module
Allen-Bradley
1771 I/O
Module
Manual: 940-57061

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Summary of Contents for AMCI 1761H

  • Page 1 1761H Intelligent Resolver Interface Module Allen-Bradley 1771 I/O Module Manual: 940-57061...

  • Page 2: General Information

    [ 1 ] year. Within this warranty period, AMCI shall, at its option, repair or replace, free of charge, any equipment covered by this warranty which is returned, shipping charges prepaid, within one year...

  • Page 3: About This Manual

    HTT-20-(x) and the HTT-400-180. The manual corresponds to software revision 1, checksum DCCA for the 1761H. The software can only be used on revision H and higher of the main PC board. The software adds backplane programmability, Autotech compatibility, to the module and incorporates several features into the 1761H that were only available as options before.
  • Page 4 About This Manual Notes ADVANCED MICRO CONTROLS INC.

  • Page 5: Chapter 1 Introduction

    The transducer completes several rotations in order to travel the complete distance. AMCI also has a line of cable reel transducers for use in some linear applications. A cable reel transducer has a stranded stainless steel cable wrapped around a spring loaded drum.
  • Page 6 Chapter 1 Introduction Overview (continued) The module has Setup Parameters that allow you to scale and adjust the position and tachometer data. Additional parameters allow you to define the type of attached transducer and the digital format of the position data. To maintain compatibility with past versions of the module, some of these parameters can be set with jumpers.
  • Page 7 Chapter 1 Introduction AMCI Compatible Transducers Table 1.2 lists the AMCI transducers compatible with the 1761H module. Model Shaft Mount Turns Comments HTT-20-100 0.625" Front NEMA 13 heavy duty transducer HTT-20-180 0.625" Front NEMA 13 heavy duty transducer HTT-20-100 w/ additional 10:1 gearing on input HTT-20-1000 0.625"...
  • Page 8 The maximum number of turns a transducer can encode is fixed by the gearing inside of it. However, the 1761H has the ability to divide this maximum number of turns into smaller multi- turn cycles. The module does this without loss of absolute position within the smaller cycle. An example of this feature is shown in figure 1.5.

  • Page 9: Programmable Parameters

    This parameter is selected by the J2 jumper on the circuit board and is not programmable from the processor. When the Resolver Type bit is set to AMCI, the Transducer Type parameter can be set to: hý...

  • Page 10: Number Of Turns

    Changing the Transducer Type parameter resets the Full Scale Count to its default value. Backplane Programming When a 1761H module is configured to use block transfers, it is programmed using data sent to it with block transfer writes. All block transfer writes are four words long. The first word of the block transfer write is called the Command Word.

  • Page 11: Power Requirements

    Information on interfacing Autotech transducers is also included. Power Requirements The 1761H module draws power from the I/O chassis +5Vdc supply. The maximum current draw is dependent on the number of transducer channels and is given in the table below. Add this to the power requirements of all other modules in the chassis when sizing the chassis power supply.

  • Page 12: Installing The Module

    5 to 2000 Hz @ 20 G’s Table 2.2 Transducer Specifications Transducer Mounting All AMCI resolver based transducers are designed to operate in the industrial environment and therefore require little attention. However, there are some general guidelines that should be observed to ensure long life.
  • Page 13 Chapter 2 Installation Transducer Outline Drawings The appropriate outline drawing is included with the transducer when shipped. The outline drawings of the HTT-20-(x) and HTT-400-180 transducers are also shown below. HTT-20-(x): Anodized/Painted Aluminum Body, 1070 Carbon Steel Shaft, NEMA 4 (x) = 100, 180, 1,000, or 1,800 3.000"...
  • Page 14 Use the table below to determine the correct cable and connectors for your application. Cables that have been assembled and tested are available from AMCI under the given part number. If you are making your own cables, cable and connectors can be ordered from AMCI.
  • Page 15 GC-1 Grounding Clamp The shield of the transducer cable must be attached to the chassis with a grounding clamp (AMCI part number GC-1). This guarantees a low impedance path to ground for any EMI radiation that may be induced into the cable. The drain wire from the grounding clamp must be connected to pin 3 of the MS-8 Transducer Input Connector.
  • Page 16 1) Autotech CBL-10T22 cable is not supported. Belden 9731 or exact equivalent must be used. 2) Cable drawings for connecting Autotech transducers are available. If you want a cable drawing instead of using the table, contact AMCI. A drawing will be faxed to you upon request. 9731...
  • Page 17 The parameters in nvRAM are corrupted. Cycle power to the module. If the fault clears, parameters will be set to default values. If the fault does not clear then module must be returned to AMCI for repair. Note: If parameters are reset to their defaults on every power up, the battery in the module may be discharged.
  • Page 18 Chapter 2 Installation Notes ADVANCED MICRO CONTROLS INC.
  • Page 19 C - Invalid Full Scale Count Parameter, Bit 01 - When this bit is set, the count is outside the range of 2 to (4096 * Number of Turns) for AMCI transducers or 2 to (1024 * Number of Turns) for Autotech transducers.
  • Page 20 The first three digits (147) are in Word 1, the last three digits (456) are in Word 2. All BTW data must be in BCD format. In the table below (Table 3.1) the modules’ parameters and data ranges for AMCI and Autotech transducers are shown. This data is sent to the module using the BTW Format in Figure 3.2.
  • Page 21 Y - Transducer Type, Bit 03 - This bit is only acted on when the Program Parameter Bit (01) is set. This bit programs the state of the Transducer Type parameter. When this bit is reset, the Transducer Type bit is set to AMCI transducers. When this bit is set, the parameter is set to Autotech transducers.

  • Page 22: Programming Example

    Block Transfer Format Programming Example The following example shows a BTR and BTW that accesses the 1761H module. It assumes 1-Slot addressing and the module is in I/O rack 2, I/O Group 5 of the system. Rung 1: BTR Instruction to the BLOCK XFER READ AMCI module.
  • Page 23 Immediate I/O instructions can also be used to update data during the program scan. The 1761H module accepts and transmits 16 bits of data when in single transfer mode.
  • Page 24 Y - Transducer Type, Bit 03 - This bit is only acted on when the Program Parameter Bit (01) is set. This bit programs the state of the Transducer Type parameter. When this bit is reset, the Transducer Type bit is reset to AMCI transducers. When this bit is set, the parameter is set to Autotech transducers.
  • Page 25 Hidden Text...
  • Page 26 ADV ANC ED MIC RO CONTROLS INC. 20 GEAR DRIVE, TERRYVILLE, CT 06786 T: (860) 585-1254 F: (860) 584-1973 amcicontrols.com LEADERS IN ADVANCED CONTROL PRODUCTS...

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