01.93
1 General Overview
1.1.2 COM area
Operator devices
These comprise operator panels, machine control panels and handwheels. The machine
control panels and handwheels are connected to the operator panel. A serial link exists
between the operator panel and COM CPU. The COM CPU transfers the data and signals
from the operator panel to the PLC by means of the link RAM.
Illustrations of the operator panel and machine control panels are contained in the
"SINUMERIK 880 units" Section.
Part program management
The part programs for workpiece machining are stored and managed in the COM area. They
can be edited at the operator panel or read in via the universal interfaces.
When machining a workpiece, the COM CPU transfers the running part program in blocks to
the NC area via the link RAM.
Computer link and interfaces
A SINEC H1 industrial bus interface is provided for integrating the control in automated
manufacturing systems. The COM area also offers RS 232 C or RS 422 interfaces for
connecting data terminals (e.g. tape reader, programmer).
Machine data (MD)
All the data specified by the machine manufacturer for matching the control to the machine
tool in question are stored in the machine data. These include, for example, the position of the
machine zero and reference point, traversing range limits, acceleration and deceleration
characteristics, spindle speeds, feedrates etc..
The machine data are stored and managed in the COM area. They are entered at the operator
panel or read in via the universal interfaces. When the control starts up the machine data are
made accessible to the other areas by means of the link RAM. The machine data are protect-
ed by a settable codeword.
Configuring (UMS)
Configuring describes the procedure used to match the control's functionality to the machine
concerned and to the operator's requirements. Machine-specific functions (e.g. cycles) or ope-
rator interfaces (images, menus, messages) can be compiled on a WS 800A NC workstation.
The configured functions, texts and images are stored in the user memory submodule (UMS).
The UMS is located in the COM area.
Maximum complement
Up to 3 operator panels, up to 3 machine control panels and up to 3 handwheels can be con-
nected.
© Siemens AG 1991 All Rights Reserved 6ZB5 410-0HE02
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SINUMERIK 880 (PJ)