Rockwell Automation 1794-APB/B FLEX I/O PROFIBUS Adapter Module User Manual - Manual (Page 116)

G–6
Publication 1794ĆUM057B-EN-P - November 2001
open at the initiator
in FMS, a connection type where the source service access
point (SAP) is shared among several communication
relationships (associated with a different destination address
and SAP). The device uses only one of these relationships at
a time, depending on the selected remote node.
open at the responder
in FMS, a connection type where the destination address and
service access point (SAP) are undefined, thus making the
connection available to any device.
OPEN command
in a MSG instruction, establishes a connection between the
coprocessor and a remote node on the network
OSI
Open Systems Interconnect. A standard that provides the
framework for defining the process of communication
between nodes on the PROFIBUS network.
physical layer
The first layer of the seven-layer OSI reference model. This
layer is where the coprocessor connects to the network
media.
PICS
Protocol Implementation Conformance Statement. System
conformance requirements associated with network
communications, consisting of four parts: implementation
and system information, supported services, supported
parameters and their options, and local implementation
values
PLCĆ5  processor
Any one of the family of Allen-Bradley Programmable
Logic Controllers that support the coprocessor interface:
PLC-5/11

, -5/20

, -5/30

, -5/40

, -5/60

and -5/80

.
PNO
PROFIBUS Nutzerorganisation, or PROFIBUS User
Organization.
PORT 1 LED
a bicolor LED, located on the front panel of the coprocessor
that indicates the condition of the FMS communication
channel of the coprocessor
PORT 2 LED
a bicolor LED, located on the front panel of the coprocessor
that indicates the condition of the DP communication
channel of the coprocessor