Communications configuring
3-86
System- and communication configuring D7-SYS - SIMADYN D
Edition 12.2003
•
Address stage 2:
"nnn-rr"
When transmitting, address stage 2 must be present. This entry is
optional for receivers. Address stage 2 consists of:
−
"nnn"
The PROFIBUS address of the communications partner (receiver)
is a decimal number,
value range 0...126.
−
"-"
The hyphen must be entered and is used to separate the station
address from the RLSAP.
−
"rr"
Remote Service Access Point (RSAP). The RSAP is a decimal
number, value range 2 ... 62.
NOTE
•
If address stage 2 is configured for the receiver, then only telegrams
from the thus specified communications partner, are accepted.
•
If address stage 2 is not configured for a receiver, then all telegrams
are accepted at the LSAP, specified by address stage 1 ("open"
LSAP).
•
Each LSAP can only be used once, i. e. either for transmitting or for
receiving. Bidirectional use is not possible.
•
AT- 'Send.#2-44.2-12'
−
Transmits via LSAP 44 to partner with PROFIBUS address 2 at its
LSAP 12.
•
AR- 'Rec.#2-10.2-13'
−
Receives via LSAP 10 from the partner with PROFIBUS address 2
from its LSAP 13.
•
AR:- 'Rec.f2.#2-48'
−
Receives from non-specified partner via "open“ LSAP 48.
NOTE
•
When transferring data it should be ensured that the lengths coincide
for the communicating transmitters and receivers. Otherwise data
transfer is "transparent", i. e. the SS5 communications module passes
through all data unchecked.
•
Word- (2 byte) and double word- (4 byte) quantities are transferred in
the Little-Endian format; this means that the least significant byte is
sent before the most significant byte. When communicating with
devices which use the Big-Endian data format, the user must
appropriately adapt (e. g. for SIMADYN D by using conversion blocks
SWB...).
Examples for data
entry at the
address
connection