21 Terms and Abbreviations
05.91
COM
Communication, communication area or communication
CPU of the SINUMERIK 880
Command channel
Interface between the PLC and NC; here the PLC can
initiate functions on the NC and transfer user data
(parameters) at the same time. The command channel
comprises 8 user interfaces so that a maximum of 8
functions can be initiated on the NC more or less
simultaneously (see Section 1 UI).
Communication area
Area of the SINUMERIK 880 responsible for
communication of the control with the user, host
computer etc. (see Section 1)
Configuration
Compilation of user-specific operations or cycles for a
control with the WS 800 workstation. The configured
operation (e.g. messages, menus) or cycles are stored in
the UMS.
CPU
Central processing unit, the actual computer for a specific
area. Example: NC CPU.
CU
Abbreviation for copper cable
Cycles
Parameterizable subroutines for NC part programs
DAC
Abbreviation for digital-analog converter
Data block
Block of data and/or signals. The data blocks are
numbered as a means of differentiation. There are two
equivalent categories of data blocks: DB and DX. See
"PLC 135 WB Planning Guide", own documentation, for
further details.
DB
Abbreviation for data block
DEC
Abbreviation for block decoding in an NC channel
Def.
Abbreviation for definition
DL
Abbreviation for the left data byte of a data word; this is
the higher-order data byte of the data word
DMP
Abbreviation for distributed machine peripherals (I/Os),
designates signals connected directly to the machine by
means of special I/O modules ( EU, DMP submodu-
le). Counterparts: central machine I/Os, connected directly
to the central controller by I/O modules.
DMP submodule
Module for connecting machine signals. DMP submodules
have their own MPC interface that allows them to be con-
nected directly together and to the central controller.
Counterparts:
I/O modules in the central controller or in EUs, I/O
submodules at the operator panel (see Section 1).
21–2
© Siemens AG 1991 All Rights Reserved 6ZB5 410-0HE02
SINUMERIK 880 (PJ)