Fieldbus Independent I/O Modules Incremental Encoder Interface Manual

Transcription

1 Fieldbus Independent Incremental Encoder Interface Manual Version 1.0.3

2 ii General opyright 2006 by WGO Kontakttechnik GmbH & o. KG ll rights reserved. WGO Kontakttechnik GmbH & o. KG Hansastraße 27 D Minden Phone: +49 (0) 571/ Fax: +49 (0) 571/ info@wago.com Web: Technical Support Phone: +49 (0) 571/ Fax: +49 (0) 571/ support@wago.com Every conceivable measure has been taken to ensure the correctness and completeness of this documentation. However, as errors can never be fully excluded, we would appreciate any information or ideas at any time. documentation@wago.com We wish to point out that the software and hardware terms as well as the trademarks of companies used and/or mentioned in the present manual are generally trademark or patent protected.

3 ontent iii ONTENT 1 Important omments Legal Principles opyright Personnel Qualification Intended Use Symbols Number Notation Safety Notes Scope Special Modules [Incremental Encoder Interface] View Description Display Elements Schematic Diagram Technical Data Functional Description Process Image...11

4 4 Important omments Legal Principles 1 Important omments 1.1 Legal Principles opyright To ensure fast installation and start-up of the units described in this manual, we strongly recommend that the following information and explanations are carefully read and abided by. This manual is copyrighted, together with all figures and illustrations contained therein. ny use of this manual which infringes the copyright provisions stipulated herein, is not permitted. Reproduction, translation and electronic and photo-technical archiving and amendments require the written consent of WGO Kontakttechnik GmbH & o. KG. Non-observance will entail the right of claims for damages. WGO Kontakttechnik GmbH & o. KG reserves the right to perform modifications allowed by technical progress. In case of grant of a patent or legal protection of utility patents all rights are reserved by WGO Kontakttechnik GmbH & o. KG. Products of other manufacturers are always named without referring to patent rights. The existence of such rights can therefore not be ruled out Personnel Qualification Intended Use The use of the product detailed in this manual is exclusively geared to specialists having qualifications in PL programming, electrical specialists or persons instructed by electrical specialists who are also familiar with the valid standards. WGO Kontakttechnik GmbH & o. KG declines all liability resulting from improper action and damage to WGO products and third party products due to non-observance of the information contained in this manual. For each individual application, the components supplied are to work with a dedicated hardware and software configuration. Modifications are only permitted within the framework of the possibilities documented in the manuals. ll other changes to the hardware and/or software and the nonconforming use of the components entail the exclusion of liability on part of WGO Kontakttechnik GmbH & o. KG. Please direct any requirements pertaining to a modified and/or new hardware or software configuration directly to WGO Kontakttechnik GmbH & o. KG.

5 Important omments 5 Symbols 1.2 Symbols Danger lways abide by this information to protect persons from injury. Warning lways abide by this information to prevent damage to the device. ttention Marginal conditions must always be observed to ensure smooth operation. ESD (Electrostatic Discharge) Warning of damage to the components by electrostatic discharge. Observe the precautionary measure for handling components at risk. Note Routines or advice for efficient use of the device and software optimization. More information References on additional literature, manuals, data sheets and INTERNET pages 1.3 Number Notation Number ode Example Note Decimal 100 normal notation Hexadecimal 0x64 notation inary '100' ' ' Within ', Nibble separated with dots

6 6 Important omments Safety Notes 1.4 Safety Notes Warning Switch off the system prior to working on bus modules! In the event of deformed contacts, the module in question is to be replaced, as its functionality can no longer be ensured on a long-term basis. The components are not resistant against materials having seeping and insulating properties. elonging to this group of materials is: e.g. aerosols, silicones, triglycerides (found in some hand creams). If it cannot be ruled out that these materials appear in the component environment, then additional measures are to be taken: - installation of the components into an appropriate enclosure - handling of the components only with clean tools and materials. ttention leaning of soiled contacts may only be done with ethyl alcohol and leather cloths. Thereby, the ESD information is to be regarded. Do not use any contact spray. The spray may impair the functioning of the contact area. The and its components are an open system. It must only be assembled in housings, cabinets or in electrical operation rooms. ccess must only be given via a key or tool to authorized qualified personnel. The relevant valid and applicable standards and guidelines concerning the installation of switch boxes are to be observed. ESD (Electrostatic Discharge) The modules are equipped with electronic components that may be destroyed by electrostatic discharge. When handling the modules, ensure that the environment (persons, workplace and packing) is well grounded. void touching conductive components, e.g. gold contacts. 1.5 Scope This manual describes the Module Incremental Encoder Interface of the modular. Handling, assembly and start-up are described in the manual of the Fieldbus oupler. Therefore this documentation is valid only in the connection with the appropriate manual.

7 [Incremental Encoder Interface] 7 View Special Modules [Incremental Encoder Interface] Incremental Encoder Interface View V 0V 0V 0V S shield (screen) power jumper contacts Fig : Incremental Encoder Interface g063400e Description The I/O module is an interface for the direct connection of any 24 V incremental encoders. 16-bit counter with quadrature decoder and a 16-bit latch for the zero pulse can be read, set or activated. The counter status is transferred rapidly and is not susceptible to faults to a P, a PL or a N via the fieldbus. period measurement with a resolution of 200 ns is possible. Sensors may be connected using the inputs, and and the supply connections 24 V and 0 V and shield (screen). The shield is directly connected to the carrier rail.

8 [Incremental Encoder Interface] Description Input Function,, Quadrature input, D 24 V Increment pulse signal channel or of the Incremental Encoder Screen (Shield) Zero reference input, D 24 V onnection for the encoder line screen The shield is directly connected to the carrier rail. +24V 24 V supply voltage for the module 0V Ground for the 24 V supply voltage Individual green status LEDs indicate the signal status of the, and inputs. Field and system level are electrically isolated. ny configuration of the specialty modules is possible when designing the fieldbus node. Grouping of module types is not necessary. The field side supply voltage of 24 V and 0 V for the electronic of the sensors and for the evaluation is derived from adjacent I/O modules or from a supply module. The supply voltage for the field side is made automatically through the individual I/O modules by means of power jumper contacts. ttention This module has no power contacts for ground (earth). For field supply with ground (earth) to downstream I/O modules, a supply module will be needed. Warning The maximum current of the internal power jumper contacts is 10. When configuring the system it is important not to exceed the maximum/sum current. However, if such a case should occur, another supply module must be added. The module can be used with all couplers/controllers of the WGO- I/O-SYSTEM 750 (except for the economy types , -323, -324 and -327). This description is valid for the XXXX202..., XXXX203..., XXXX and XXXX21... hardware and software versions, the schematic diagram is tested for the version XXXX21... The version is specified in the manufacturing number, which is part of the lateral marking on the module.

9 [Incremental Encoder Interface] 9 Display Elements Display Elements LED Denotation State Function D green green Fig : Display Elements g063402x green Quadrature Input on off is equivalent to U > 15 V is equivalent to U < 5 V Quadrature on is equivalent to U > 15 V Input off is equivalent to U < 5 V Zero on is equivalent to U > 15 V reference Input off is equivalent to U < 5 V Schematic Diagram 24V V 270pF,, Logic 0V 3 7 0V 4 8 shield (screen) 10nF Fig :Incremental Encoder Interface g063401e

10 [Incremental Encoder Interface] Technical Data Technical Data Module Specific Data Sensor connection Sensor operation voltage Signal voltage,, ounter ut off frequency Quadrature decoder Zero impulse latch ommands,, D 24 V (1) U > 15 V (0) U < 5V 16 it binary 1 MHz 4- fold report 16 bits read, set, enable Voltage supply D 24 V (- 15 % %) urrent consumption max (internal) urrent consumption max (field side) Isolation it width 50 m 0 m (without sensor load) 500 V (system/supply) 2 x 16 bits data 1 x 8 bits ontrol/status 1 x 8 bits reserved Dimensions (mm) W x H x L 12 x 64* x 100 *from upper edge of DIN 35 rail Weight ca. 60 g Standards and Regulations (cf hapter 2.2 of the oupler/ontroller Manual) EM-Immunity of interference acc. to EN (95) EMV-Emission of interference acc. to EN (94) pprovals (cf hapter 2.2 of the oupler/ontroller Manual) onformity Marking More Information Detailed references to the approvals are listed in the document "Overview pprovals ", which you can find on the D ROM ELETRONI Tools and Docs (Item-No.: ) or in the internet under: Documentation!! System Description

11 [Incremental Encoder Interface] 11 Functional Description Functional Description Process Image Typically, incremental encoders supply two output signals for the encoder track, both 90 offset. These signals are designated and. Usually, incremental encoders have an index track in addition to the two track signals. This index track only produces one pulse per one full encoder revolution. This pulse and the counter reading can be used to determine the absolute encoder position during rotation. The index pulse has a duration of a track position pulse. We recommend to always perform the latch process in the same rotational direction. Using the I/O module , a 5 byte input and output process image can be transferred to the fieldbus coupler / controller via one logical channel. The data sent and received is stored in 2 output bytes (D0, D1) and 5 input bytes (D0, D1, D2, D3, D4). The output bytes D2... D4 are reserved and without function. One control byte () and one status byte (S) are used to control the data flow. ttention The representation of the process data of some I/O modules or their variations in the process image depends on the fieldbus coupler/-controller used. Please take this information as well as the particular design of the respective control/status bytes from the section "Fieldbus Specific Design of the Process Data" included in the description concerning the process image of the corresponding coupler/controller. Input Data Output Data S Status byte ontrol byte D0 ounter value byte 0 (LS) D0 ounter set value byte 0 (LS) D1 ounter value byte 1 (MS) D1 ounter set value byte 1 (MS) D2 Signal, and / ycle duration byte 2 (MS) D3 Latch value byte 0 (LS) / ycle duration byte 0 (LS) D4 Latch value byte 1 (MS) / ycle duration byte 1 D2 D3 D4 reserved reserved reserved

12 [Incremental Encoder Interface] Process Image Status yte it 7 it 6 it 5 it 4 it 3 it 2 it 1 it OVER- FLOW UNDER- FLOW NTSET _ RD- PERIOD _Q LT_ VL LT_VL zero point (latch) has occurred. The data D3, D4 in the process image match the latched value in case the cycle duration has not been requested and the bit is set. In order to reactivate the latch input it is necessary to reset EN_LT, to wait for the acknowledgement and to reset the bit. RD- The data bytes D2, D3, D4 contain the cycle duration. PERIOD_Q NTSET_ cknowledge bit for NT_SET Reset if NT_SET=0 UNDER- In the event of an underflow (0 to 65535) of the 16-it counter, this bit will be set. reset will FLOW take place if the counter underruns two third of the measuring range (43690 to 43689) or as soon as an overflow occurs. OVER-FLOW In the event of an overflow (65535 to 0) of the 16-it counter, this bit will be set. reset will take place if the counter exceeds one third of the measuring range (21845 to 21846) or as soon as an underflow occurs. 0 reserved ontrol yte it 7 it 6 it 5 it 4 it 3 it 2 it 1 it NT_ SET RD- PERIOD EN_ LT EN_LT Zero point (input ) is activated. If the EN_LT bit is set, the counter value will be stored in the latch register with the first latch pulse. The following pulses have no effect on the latch register. RD-PERIOD The cycle duration between positive edges (input ) is measured with a resolution of 200 ns. If the bit is set, the cycle duration will be stored in data bytes D2, D3, D4. NT_SET With a positive edge, the counter is initialized with the set value. 0 reserved Signal, and in Data yte 2 The input signals, and are send in data byte 2 (D2) of the input data, if bit 1 (RD-PERIOD) in the ontrol byte is '0'. Signal, and in D2 it 7 it 6 it 5 it 4 it 3 it 2 it 1 it Signal Signal Signal 0 0 0

13 [Incremental Encoder Interface] 13 Process Image

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