Glossary
PROFIBUS manual
Version FELD-V2002.02
Page 33
6. Glossary
Alarm model:
Optional PROFIBUS service for acyclical data traffic. Not
supported by the DIGIFORCE
®
type 9310.
ASIC:
User-specific IC containing either part or all of the PROFIBUS
protocol enabling PROFIBUS interfacing using just a few
additional components. The SPC 42 (SIEMENS PROFIBUS
Controller) ASIC is used in the DIGIFORCE
®
type 9310.
ASPC2:
Advanced Siemens PROFIBUS Controller for 12 Mbaud PRO-
FIBUS-ASIC for master applications
Bus segment:
For physical reasons, the PROFIBUS is divided into segments
connected via repeaters to expand the PROFIBUS to its full size
and achieve the maximum number of stations.
DP:
Distributed Peripheral. PROFIBUS protocol whose strengths lie
in high-speed cyclical data transfer.
DU:
Data Unit (net data to be transferred, value range 1 to 244
bytes/message).
EN 50 170
Binding Europe-wide standard for PROFIBUS DP and FMS-.
Successor to the German standard DIN 19245.
FDL:
Fieldbus Data Link, also called Layer 2.
FMS:
Fieldbus Message Specification. Transmission protocol on the
PROFIBUS whose strengths tend to lie in object-oriented data
transfer because of the powerful services it offers. FMS can be
used in common with DP.
Freeze mode:
This command is used to make a slave "freeze" the inputs. Often
used for synchronization purposes. Not supported by the
DIGIFORCE
®
type 9310.
GSD file:
The GSD file contains the device description data for the product,
which must be supplied by the device manufacturer. The GSD file
is usually supplied on floppy disk with the device and contains
the technical specification of the device. This file is needed for
configuration.
ID number:
A 16-bit number assigned by the PROFIBUS user organization
that uniquely identifies a product. It provides a reference to the
GSD file. For modular devices or devices that can be described in
the same GSD file, one ID number can be assigned to a whole
device series.
The DIGIFORCE
®
type 9310 has the number 0x06E5 Hex