ISO DIS 21919-1
Physical device control - Interfaces for automated machine tending - Part 1: Overview and fundamental principles
|Publication Date:||6 December 2018|
|ICS Code (Numerically controlled machines):||25.040.20|
The standard series ISO 21919 describes interfaces for automated machine tending. These interfaces are the link between automated machine tending devices and machines used for production. The automated machine tending is initiated by either the machine tending system or by the machine.
Automated machine tending refers to the automatic loading or unloading of at least 1 computer numerically controlled (CNC) machine (typically a machine tool) by using a machine tending device, e.g. a robot, handling system or gantry. There are applications ranging from simple parts removal to material flow dedicated complex production lines. It is noteworthy that the processing technologies of the machines are independent to the interface and a majority of machine technologies can be integrated with the same standard. This standard is not intended to communicate to a MES (Manufacturing Execution System).
In general the interfaces for automated machine tending are composed of
- control-related, and
- safety-related connections.
This standard series concentrates on the control-related and safety-related connections. It does not describe the mechanical connections.
This part of the standard gives an overview and defines the fundamental principles on how the interfaces are set up. It defines the necessary vocabulary and sets the syntax for the structure of signals. It distinguishes between the safety interface, the control interface and project specific extensions.
This part of the standard defines 3 conformance levels and dedicated conformance classes. Levels and classes consist of a number of signals to
- allow a flexible adaptation of the interface(s) to a project-specific scope of functions and simultaneously
- tie sets of signals tight enough to avoid unnecessary coordination efforts between suppliers of the machine tending devices and machines.
This part of the standard does not determine the transfer physics, a pin assignment, the hardware of the interfaces or measure of communication, e.g. protocol.
Subsequent parts of this standard series deal with the safety interface and control interface. They allocate signals to a conformance level and/or conformance class. They describe the detailed functions of each signal, describe and display the timing interactions between signals in flow charts and show examples for safety matrices and safety-related functional relationships