User Manual 1761H Intelligent Resolver Interface Module Allen-Bradley 1771 I/O Module Manual: 940-57061
General Information Important User Information The products and application data described in this manual are useful in a wide variety of different applications. Therefore, the user and others responsible for applying these products described herein are responsible for determining the acceptability for each application. While efforts have been made to provide accurate information within this manual, AMCI assumes no responsibility for the application or the completeness of the information contained herein.
About This Manual Introduction There are now a variety of 1700 Series Intelligent Resolver Interface Modules for AllenBradley 1771 I/O to fit your application. These modules accept one, two, three, or four resolver inputs and convert the resolvers analog signals into digital position and tachometer data that is transmitted to the processor over the backplane.
About This Manual Notes 4 ADVANCED MICRO CONTROLS INC.
Chapter 1 Introduction This chapter serves as an introduction to the 1761H module. It highlights potential applications, compatible transducers, and all of the modules’ features, including those added since the last revision. Overview The 1761H module is the Allen Bradley 1771 I/O compliant card that converts resolver signals to digital multiturn position and tachometer data that can be reported over the backplane using either block or single transfers.
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. Most of the parameters can be programmed over the backplane using block transfers.
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 HTT-20-180 0.625" 0.625" Front Front HTT-20-1000 0.625" Front HTT-20-1800 0.625" Front HTT425-Ann-100† 0.250" Motor HTT425-Mnn-100† 10 mm Motor HTT425-Fnn-100† 0.625" Front HTT425-Tnn-100† 0.625" Foot HTT400-180 0.625" Front HTTCR-9n-100 0.
Chapter 1 Introduction Other Compatible Transducers In addition to AMCI transducers, the 1761H module now directly support Autotech multiturn transducers. The Autotech models supported are: hýAll SAC-RL210-G128 Transducers. (Size 40, NEMA 13) Autotech also manufactures SAC-RL210-G64 transducers. These transducers are not supported by AMCI. You select between AMCI and Autotech transducers over the backplane from the processor. The module then sets the reference voltage according to your selection.
Chapter 1 Introduction The remainder of this chapter introduces the many programmable features of the 1761H module. It also introduces backplane programming concepts that allows you to control the module from the processor. Programmable Parameters Programmable parameters are stored in the modules nonvolatile memory. Therefore, you do not have to configure the module after every power up. Prior to hardware revision H of the module, the nonvolatile memory was EEPROM.
Chapter 1 Introduction Programmable Parameters (continued) Number of Turns The Number of Turns parameter sets the number of turns needed to complete one multi-turn cycle. The values that can be programmed into this parameter is dependent on the value of the Transducer Type parameter. hýWhen using a 100 turn transducer, the number of turns is programmable to 1, 2, 4, 5, 10, 20, 25, 50, or 100.
Chapter 2 Installation This chapter gives information on installing AMCI transducers. This includes information on transducer mounting, shaft loading, and cable installation. 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.
Chapter 2 Installation Installing the Module Remove system power before removing or installing any module in an I/O chassis. Failure to observe this warning may result in damage to the module's circuitry and/or undesired operation with possible injury to personnel. Keying Bands Plastic keying bands can be inserted into the top backplane connector to prevent the insertion of other modules. hýPins 28 and 30 hýPins 32 and 34.
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" (76.20) 2.000" (50.80) 0.500" (12.70) 1.000" (25.40) 0.375" (9.53) 4.00" (101.60) 0.150" (3.81) 0.500" (12.70) 1.25" (31.8) 1.000" 2.000" (25.40) (50.80) 1.1815" (30.
Chapter 2 Installation Transducer Cable Installation 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. Module AMCI Part # Belden Cable Module Connector Transducer Connector 1761H CTT - (x) 9731 MS-8 MS-20 Table 2.4 Transducer Cable Numbers 1) Resolvers are low voltage devices.
Chapter 2 Installation Transducer Cable Wiring Diagrams CTT-(x) Wiring Diagram (1761H) Module Connector BELDEN 9731 Cable AMCI Part #: MS-8 Phoenix #: MSTB2.5/8-ST-5.
Chapter 2 Installation Autotech Transducer Installation Transducer Mounting The 1761H module directly support Autotech SAC-RL210-G128 transducers. The Autotech SAC-RL210-G64 transducers are not supported by AMCI. Refer to Autotech literature for dimensional drawings and mounting recommendations. Transducer Wiring Table 3.5 is a wiring table for all supported Autotech transducers.
Chapter 2 Installation Indicator LED Patterns Two LED's on the front panel show the operating status of the module as shown in table 2.6. GREEN LED RED LED On Off INDICATION MODULE OK Module and transducer are operating properly. On Flashing TRANSDUCER FAULT Transducer not operating properly. There are 6 major causes of this fault.
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Chapter 3 Block Transfer Format Block Transfer Definition Block Transfers are used by most intelligent I/O cards. Block Transfers move a block of up to sixty-four words over the backplane at one time. This transfer will occur only when the rung containing the Block Transfer instruction in your ladder logic program becomes true. Block Transfer Read instructions transfer data from the module to the processor. Block Transfer Write instructions transfer data from the processor to the module.
Chapter 3 Block Transfer Format Block Transfer Write Format The PLC writes four 16 bit words to the module when a Block Transfer Write takes place. These words can program the Number of Turns and Full Scale Count parameters as well as Count Direction, Transducer Type and Resolver Type. You can also reset the position data to zero (Autozero). The data format is shown in Figure 3.2.
Chapter 3 Block Transfer Format Block Transfer Write Format (continued) Programming Bits Z - Autozero, Bit 00 - When this bit is set, the module will zero the position of the transducer. P - Program Parameters, Bit 01 - When this bit is set, the module programs itself with the state of bits 02 and 03. These parameters are the Count Direction and Transducer Type of the transducer. Program Bit 1 will also act on the Number of Turns and Full Scale Count parameters.
Chapter 3 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. BLOCK XFER READ RACK 2 GROUP 5 MODULE 0 CONTROL N7:20 DATA N7:25 LENGTH 4 CONTINUOUS Y (EN) (DN) (ER) Rung 2: Copy File Instruction buffers the data from the module. This insures that the program will use the same data throughout each scan.
Chapter 4 Single Transfer Format Single Transfer Definition Single transfers are used by most non-intelligent I/O cards such as DC input cards. Single transfers automatically move data between the module and the processor’s input or output image tables every program scan. 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.
Chapter 4 Single Transfer Format Single Transfer Output Format When using a 1761H module in Single Transfer Mode, the processor is writing to the module’s output table at the address assigned to the slot. The format of the data is binary. The setting of J3-2 (Binary/BCD data jumper) has no effect. Number of Turns and Full Scale Count parameters are fixed. Figure 4.2 shows the format of Output Word 0.
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