Siemens PLT130
.
1994

4/4

Interface module for 20-m local bus (N16-M), 16 bit
Description and ordering data
1 LED F (red), signals faults (line protocolfaulty, receiver memory overflow)
2 LEDs (green)
D signals ”Data trans fer on bus”
M signals ”Interface module has master function”
T signals ”Bus processor busy”
B indicatessetting of inter face module on bus B
A indicatessetting of inter face module on bus A
3 DIP switch for setting the bus address and for selection of redundant/
non-redundant remoteb us
4 DIP switch for setting the participant address
5 Front plug for 20-m local bus
Fig.4/3 Interface module for 20-m local bus (N16-M), 16 bit
Application
Toconnect the OS 265 -3 operation and monitoring system and
SICOMPM minicomputers to theCS 275 bus system. The
SICOMP M minicomputer mus t be equipped with the KSN-16M
coupling software to adapt bus communicati on. Local bus cou-
pling( < 20 m) with other par ticipants is only poss ible if these
havet he same earth potential. Both coupl ing participants must
havet he same earthing concept (e. g. OS 265-3and AS 235/K/H
systems).The remotebus connection unit (cf . page 4/11 must be
usedi n all other cases and provides elect rical isolation t ogether
witht he bus converters UI (page 4/ 9).
The module handles the following duties connected with data
transmission:
Collection of parameters and processing of input/out put in-
structions on the I/O int erface channel of the SICOMP M mini-
computer
Signallingof operating statuses and faults withdefined dis-
plays.
Design
Plug-in module, triple height, with 1 base plug and 1 front plug.
Front panel width 15.24 mm = 1 standard slot.
Defined slot EA 01 in the SICOMP M mini computer.
The interface processor of the modul es is an SAB 80186 chip
witha 32-kbyte program memory(EPROM) and 8-kbyte data
memory (RAM).
Mode of operation
Handling of messages
Depending on the type and parameterizati on of the communica-
tion instructions, t he interface module N16-M transmi ts and re-
ceives protected messages of various lengths up to 128 byte
via the serial bus. A mess age can be sent to a single bus par-
ticipant, to several par ticipants or to all part icipants.
Apart from certain cycli c messages, the receiver acknowledges
every message received.
The transmitter is imm ediately informed when a message has
been received without faults. I n certain cases, the required data
are also transmitted immediat ely with this feedback, thus enab-
ling short reaction tim es.
The interface module N16-M stores the messages in its t rans-
mitter and receiver buffers unt il they are processed and trans-
mitted and thus dynamically decoupl es the OS 265-3 system or
the SICOMPM minicomputer from the datatransfer on the bus
during times of peak loading. To reduce the time required for
organizational tasks, the interface modulecollects several mes-
sages over a specific period and combines these into a pack-
age. This is not the case if s hort reaction times are required.
In addition to the data messages, the interface module als o
generates and processes organizational messages t ogether
withthe other interface moduleson the CS 275 bus system.
These are required, for example, to trans fer the master function,
for routing information, redundancy tests, monitori ng and signal-
ling information.
Time synchronization
The interface module receives ti me messages and routes these
onto the OS 265-3 system or SICOMPM minicomputer.In the
opposite direction, it can also recei ve the time from the
OS265-3 system or SICOMP M minicomputerand transmitit on
the bus in order to synchronize the par ticipants.
Diagnostic functions
The interface module detects and si gnals static and dynamic
faults and any states which could be critical for the bus loading.
It monitors the processes on the bus, on the interf aces to the
usersystem and in the interface moduleitself.
During operation, cyclically tri ggeredt est programs carry out an
extensive hardware test of the i nterface module. Faults are
therefore early detected and malfuncti ons and cumulative faults
are thus prevented. External bus diagnosis via the coupling
software is also possibl e. The interface module provides a diag-
nostic list with 23 posi tions which can be read for this purpose.
Technical data
Powersupply +5V
-- 1 2 V
Currentcons umption
With+ 5 V
With-- 12 V
2.8A
0.05A
Interfaces
-- B a s e p l u g
--Front plug
SICOMP M I/O interface channel
Redundant 20-m local bus input/output,
open collector,asymmetric,
for connectionof a cab leconnector
withmetal front plug and contact points
Weight Approx. 0.55kg
Ordering data
OrderNo.
Interfacemodule for 20-m local bus (N16-M), 6DS1 205-8AA
16b it
Instructions
Interface module for 20-m local bus (N16-M), Order No.
German C79000--B8000--C128
English C79000--B8076--C128
French C79000--B8077--C128
Spanish C79000--B8078--C128
Created with "Chameleon CMYK PDF Creator" for Wolfgang Strozyk at Siemens AG
This catalog is out of date, see note on page 2