1、BRITISH STANDARD BS 5782:1979 IEC 550:1977 Specification for Interface between numerical controls and industrial machines UDC 62 52:681.5:681.323:621.3.062BS5782:1979 This British Standard, having been prepared under the directionof the Power ElectricalEngineering StandardsCommittee, was published u
2、nder the authority ofthe Executive Board and comesinto effect on 31August 1979 BSI 12-1999 The following BSI references relate to the work on this standard: Committee reference PEL/84 Draft for comment 78/25953 DC ISBN 0 580 10898 8 Cooperating organizations The Power Electrical Engineering Standard
3、s Committee, under whose direction this British Standard was prepared, consists of representatives from the following Government departments and scientific and industrial organizations: Associated Offices Technical Committee Association of Short Circuit Testing Authorities British Electrical and All
4、ied Manufacturers Association (BEAMA) British Railways Board British Steel Corporation Department of Energy (Electricity) Electrical Contractors Association Electrical Contractors Association of Scotland Electrical Research Association* Electricity Supply Industry in England and Wales Engineering Eq
5、uipment Users Association Institute of Purchasing and Supply Institution of Electrical Engineers Ministry of Defence* National Coal Board National Economic Development Office The organizations marked with an asterisk in the above list, together with the following, were directly represented on the co
6、mmittee entrusted with the preparation of this British Standard: Association of Electrical Machinery Trades British Electrical Systems Association (BEAMA) British Textile Machinery Association Control and Automation Manufacturers Association (BEAMA) Health and Safety Executive Institution of Product
7、ion Engineers Machine Tool Industry Research Association Amendments issued since publication Amd. No. Date of issue CommentsBS5782:1979 BSI 12-1999 i Contents Page Cooperating organizations Inside front cover National foreword iii 1 General 1 1.1 Scope 1 1.2 Object 1 2 Definitions 1 2.1 Numerical co
8、ntrol 1 2.2 Interface 1 3 General requirements for interface connections 2 3.1 Connection of shielding 2 3.2 Routing and spacing of cables 2 3.3 Specification of cables 2 4 Recommendations and requirements for Group I interface 2 4.1 Isolation between numerical control and thyristor motor drives 2 4
9、.2 Connections between control and power circuits 3 4.3 Hydraulic servo-valves 3 4.4 Velocity command voltage signals 3 4.5 Servo-energization 3 5 Recommendations and requirements for Group II interface 3 5.1 Shielding of connections 3 5.2 Routing of connections 3 5.3 Information from numerical cont
10、rol builder 3 6 Recommendations and requirements for Group III interface 4 6.1 Power supply for the numerical control 4 6.2 Connection to the supply network 4 6.3 Independent supply for thyristor drives 4 6.4 Protection against overcurrents 4 6.5 Immunity to externally generated electrical interfere
11、nce 4 6.6 Protection against emission of interference (under consideration) 5 6.7 Protective circuit 5 7 General recommendations and requirements for Group IV interface 5 7.1 Terminations and connectors 5 7.2 Inputs 5 7.3 Outputs 6 7.4 Power supply for input and output circuits 6 7.5 Suppression of
12、transient voltages on outputs of the numerical control 6 8 Compulsory or necessary signals in Group IV interface 7 8.1 Compulsory input signals for inhibiting operations 7 8.2 Input signals to the numerical control necessary for operation 8 8.3 Output signals from the numerical control to the machin
13、e necessary for operation 9 9 Auxiliary and miscellaneous signals in Group IV interface 9 9.1 Pulsed mode 10 9.2 Maintained mode 10 9.3 Time interval values 10 10 Examples of optional signals in Group IV interface 10 10.1 Numerical control is ready to move an axis 10BS5782:1979 ii BSI 12-1999 Page 1
14、0.2 Permission for axes to move (X, Y, Z, etc.) 10 10.3 Block stop 11 10.4 Align numerical control 11 Figure 1 Relations between the numerical control, the control equipment and the machine 12 Figure 2 Group I of the interface: velocity controls 13 Figure 3 Group IV of the interface: ON/OFF signals
15、14 Figure 4 Examples of timing for miscellaneous commands such as those addressed by M, S or T 15 Publications referred to Inside back coverBS5782:1979 BSI 12-1999 iii National foreword This British Standard has been prepared under the direction of the Power Electrical Engineering Standards Committe
16、e and is identical with the International Electrotechnical Commission (IEC) Publication550. It also implements CENELEC Harmonization DocumentHD373 issued by the European Committee for Electrotechnical Standardization. Terminology and conventions. The text of the International Standard has been appro
17、ved as suitable for publication, without deviation, as a British Standard. Some terminology and certain conventions are not identical with those used in British Standards. NOTE 1Clauses9 and10 refer to an ISO project which may eventually result in the publication of ISO4336 “Specification for interf
18、ace signals between numerical control units and the electrical equipment of an NC machine”. Upon the publication of the ISO standard this British Standard will be reviewed. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are respo
19、nsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Cross-references International Standard Corresponding British Standard IEC 204-1:1965 IEC 204-2:1967 BS 2771:1974 Electrical equipment of machine tools. General purpose
20、 and mass production machines and their electronic equipment (Technically equivalent) ISO 1056:1975 ISO 1057:1973 ISO 1058:1973 ISO 1059:1973 BS 3635 The numerical control of machines Part 1:1972 Control input data (Technically equivalent) Summary of pages This document comprises a front cover, an i
21、nside front cover, pages i to iv, pages1 to 16, an inside back cover and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover.iv blankBS5782:1979 BSI 12-1999 1 1 General 1.1
22、 Scope This standard applies to the interface between numerical controls (for explanations, seeClause2) and the electrical equipment of industrial machines which are commanded by numerical controls. 1.2 Object The purpose of this standard is to provide specifications for an interface between a numer
23、ical control and the other electrical equipment associated with the machine with the following objectives: a) to ensure the safety of personnel and property; b) to standardize all compulsory features (and some others) to the extent necessary for the safe use of equipment from different manufacturers
24、; c) to define certain signals going through the interface, to make recommendations for standardizing their electrical characteristics and also to recommend methods of connection and installation. 2 Definitions 2.1 numerical control the numerical control is the electrical and electronic equipment th
25、at receives commands in digital form from perforated tape or other types of input, as well as positional information of certain elements of the machine. The numerical control interprets certain of these numbers as requirements for new positions of the machine elements and gives appropriate commands
26、of direction and velocity. The numerical control also interprets certain other numbers as a command of velocity, of discrete functions, of actions, etc. 2.2 Interface The interface consists physically of the connections between the numerical control on the one hand and on the other hand the machine
27、and the machine control electrical equipment. Functional areas of interface Figure 1, page12, shows the areas of interface between the numerical control, the machine and the machine control equipment that are defined as “machine/numerical control interface”. The interface is divided functionally int
28、o four groups (or types) of connections (seeFigure 1). The composition of the groups does not depend on the arrangement of enclosures; they are valid in both cases, when machine control and motor drives are physically separate, and when either or both are in the enclosure of the numerical control. 2
29、.2.1 Group I Drive commands connections commanding velocity or indicating servo error, and connections from the numerical control to motor velocity controls (seeFigure 2, page13) this group includes in particular the connections to hydraulic servo-valves and to d.c.motors which are used for driving
30、numerically controlled axes or machine spindles. It also includes the connections for velocity commands and outputs to the motors 2.2.2 Group II Interconnections with measurement systems and measuring transducers connections for measurement of position on linear and rotary axes and of spindle orient
31、ation; also for other measuring transducers associated with the numerical control, such as adaptive control signals. This group includes the connections for associated excitation and supply voltages, also tacho-generator signals when these are connected directly to the numerical control 2.2.3 Group
32、III Power supply and protective circuit connections and recommended procedures for connecting the numerical control and the various parts to the protective circuit and to the main power supply systemBS5782:1979 2 BSI 12-1999 2.2.4 Group IV ON/OFF and coded signals ON/OFF signals, both compulsory and
33、 optional, interchanged between the numerical control and the machine (seeFigure 3 andFigure 4, pages14 and15) and other signals not belonging to GroupsI,II andIII 3 General requirements for interface connections 3.1 Connection of shielding The shielding of cables shall be connected to the frame or
34、to the protective circuit at the numerical control. The numerical control builder shall be responsible for these connections or shall indicate exactly their location if they are, as an exception, to be made outside the numerical control. The user shall not connect the shielding at any other point to
35、 any metallic structure, nor by any alternative route to the frame or to the protective circuit, except by agreement of the numerical control builder. The shielding shall have electrical continuity from the numerical control to the remote termination with the length of unshielded cable connection ke
36、pt to a minimum. The shielding shall not be used as a connection nor as a current-carrying element between the devices at each end of the cable. All shielded cables shall be externally insulated to prevent accidental contact with any other metallic parts. This outer insulation shall either afford me
37、chanical protection of the cable or it shall be additionally covered with a mechanically protective outer layer or layers. 3.2 Routing and spacing of cables Where conductors from different groups run parallel to each other in the same raceway and also at their points of connection to the numerical c
38、ontrol, they shall be separated by a sufficient distance and/or additional shielding shall reduce mutual interference effects to an insignificant level. Alternatively, each group shall have its own shield. It shall be the responsibility of the numerical control builder to give the advice necessary t
39、o fulfil this requirement. The numerical control builder shall advise if it is necessary to group separately and shield the inputs and outputs of the GroupIV connections. In the case of GroupII cables, connections to each measuring device shall be shielded separately. Exceptions to this sub-clause a
40、re permitted in relation to connections of GroupsI andII when their terminations at the machine are in proximity and they are functionally related and are low level signals. Specific examples are velocity command signals, such as voltage signals to d.c.motor drives and current signals to hydraulic s
41、ervo-valves. Either of these may be associated with connections to measuring transducers. 3.3 Specification of cables The numerical control builder shall recommend types of shielded cable suitable for use with the numerical control. These shall have an insulating cover over the shield and have suita
42、ble resistance to mechanical damage. Unless otherwise specified, the interior wires shall be in twisted pairs or groups with a recommended pitch of one full turn in15mm or less. Insulation and stranding shall be suitable for the purpose and the mechanical duty. 4 Recommendations and requirements for
43、 GroupI interface (Velocity command signals, seeFigure 2, page13.) 4.1 Isolation between numerical control and thyristor motor drives Inside a motor control with thyristors, there shall be no electrically conductive connection between the power circuit of the motor and the numerical control except a
44、s specified inSub-clause4.2. Connections to the protective conductor shall be in accordance with Sub-clause6.7. Connections for the velocity command signals from the numerical control to the thyristor drives for axis motors may or may not comprise a zero-reference potential connection seeFigure 2 b)
45、 andFigure 2 a). The thyristor drive shall always be insensitive to common-mode inputs between its input terminals and the frame. Where transistor switching devices are used rather than thyristors, this sub-clause does not apply.BS5782:1979 BSI 12-1999 3 4.2 Connections between control and power cir
46、cuits The manufacturer of the motor drive shall ensure that no intentional electrical path under20k7 resistance exists between the control and power (thyristor) circuits, except for any common connections to the protective circuit. This includes any means for measuring motor armature current. Any br
47、eakdown in the drive shall not have any damaging effect on the numerical control. 4.3 Hydraulic servo-valves The numerical control builder is recommended to provide for output currents proportional to machine velocity or alternatively to advise the machine builder of appropriate voltage-to-current c
48、onversion devices. Unless otherwise specified, the numerical control shall be able to supply currents up to a maximum of 0.7A at8V or 0.3A at 15V. 4.4 Velocity command voltage signals This sub-clause applies when the axes of the machine are driven by proportional servo-systems and the power controll
49、er for the motor is physically external to the numerical control. The numerical control output of “position error” then forms a command of machine velocity. This sub-clause also applies to commands of velocity of rotation of the spindles of the machine. 4.4.1 It is recommended that the motor rated speed for a 10V signal should be chosen so that the voltage command for maximum motor revolutions per minute under the conditions of use lies between7V and10V. The numerical control shall provide an output that is linearly proportional to the
