ISO/TR 6132:1981, Numerical control of machines - Operational command and data format

The numerical control systems addressed by this Technical Report use a combination of two types of data :Machine program data — Data formatted in accordance with ISO 2539 and coded in accordance with ISO 840Operational statements — Machine set-up, initialization and/or operational parameter data formatted in accordance with this Technical Report and coded in accordance with ISO 646. Character subset:0-8 0-9 0-10 0-13characters of column 2 except 2-7characters of column 3 except 3-11 and 3-15characters of column 4 except 4-0characters of column 5characters 7-12 and 7-15 Operational statementsIt is not expected that all NC systems will embody all the features and capabilities for which operational statements have been defined in this Technical Report. When an NC system has the capability to enter operational statements, the mnemonics and formats defined in this Technical Report shall be used. It is not intended that the functions defined herein shall limit the capabilities of NC systems; additional functions and operational statements may be defined and implemented by the control builder as required. It is also expected that in some instances, a control builder may, at his discretion, implement one or more of the functions defined herein exclusively with pushbutton switches or other conventional operator controls. If these functions are labelled in an abbreviated or mnemonic fashion, the mnemonics defined in this Technical Report shall be used.Hardware configurationThis Technical Report deals with numerical control systems which may assume any of a wide variety of hardware configurations according to the purpose and capabilities required of the system. Figure 1 shows a numerical control system containing several types of peripheral hardware. The primary concern of this Technical Report is the form of the data prepared by the part programmer or introduced by the operator into the numerical control system through one or more of these devices. In general, these data can be either “machine program data” or “operational statements”. Binary data interchange in formats not conforming to this Technical Report may be utilized within or among various devices, at the convenience of the control builder, whenever such interchange is transparent to the user.Figure 1 suggests some of the possible types of peripheral equipment that may be used with a numerical control system; it is not the intent of this Technical Report to specify or to limit the types of peripherals used in a given system. Other standards exist to define some of the physical interfaces implied by figure 1.Functional categories of commandsTo illustrate the implementation of a system having a broad range of commands and with maximum utilization of an alphanumeric keyboard for command entry, a system having a structure organization according to figure 2 has been used.Figure 2 shows several categories of commands that may be implemented. It is not the intent of this Technical Report to specifically require or to limit the commands to those shown in figure 2; the extent of the capabilities of any given numerical control system will depend upon the use to which the system is put. In some systems, diagnostic capabilities, management information system facilities and other specialized functions or categories might be provided in addition to those shown in figure 2.A feature of the organization shown in figure 2 is the existence of a Mode Selector level in the system structure. An operator communicating with a numerical control system having this structure can gain access to any of the subordinate command categories from the Mode Selector level. Once he has entered the appropriate sub-level, he can perform any desired operation for which mnemonic commands have been defined in that command category. When he has completed his task, he can switch from the sub-level back to the Mode Selector level and, from there, enter any other desired sub-level