Rockwell Automation 1794-APB/B FLEX I/O PROFIBUS Adapter Module User Manual - Manual (Page 114)

G–4
Publication 1794ĆUM057B-EN-P - November 2001
FMS interface
a 9-pin female D-shell connector located at Port 1 on the
front panel of the coprocessor.
FMS Physical Access Addressing
FMS option that allows the access of data at a physical
address by specifying the address in the service.
FMS Symbolic Access Addressing
FMS option that allows to statically associate a symbolic
name or short reference number (or index) with a physical
address within a node.
fault management
set of FMA 7 services that allows resetting the
communication and indicates communication faults and
events
HPRIO
High Priority service request. A qualifier to specify high
priority for unconfirmed services such as UINFO and
USTAT.
I/O chassis
the chassis or rack that serves as the location for the
processor, coprocessor, power supply and other I/O modules.
Also referred to as chassis.
LED
Light-emitting diode.
link layer
defines a hybrid method for accessing the communication
medium (bus) with master/active stations or slave/passive
stations.
Local Station Manager
an Allen-Bradley PC program that runs under Microsoft
Windows version 3.1. This program transfers data
(FDL,CRL, OD, station address, communication rate, and
maximum station address) between the PC and the
coprocessor over RS-232.
logical module
DP protocol describes I/O data exchanged between a PLC
master and a slave device as a set of logical modules (up to
64, but 32 preferred) each one featuring up to 16 bits
maximum of inputs, outputs or a combination of both. The
actual structure of exchanged input and output frames is
deduced from this description.
lower layer interface (LLI)
in FMS, responsible for interfacing the FMS layer 7 with
FDL layer 2. LLI manages connections