User's Manual

Siemens PLT 130
.
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 protocol faulty, receiver memory overflow)
2 LEDs (green)
D signals ”Data transfer on bus”
M signals ”Interface module has master function”
T signals ”Bus processor busy”
B indicates setting of interface module on bus B
A indicates setting of interface module on bus A
3 DIP switch for setting the bus address and for selection of redundant/
non-redundant remote bus
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
To connect the OS 265-3 operation and monitoring system and
SICOMP M minicomputers to the CS 275 bus system. The
SICOMP M minicomputer must be equipped with the KSN-16M
coupling software to adapt bus communication. Local bus cou-
pling (< 20 m) with other participants is only possible if these
have the same earth potential. Both coupling participants must
have the same earthing concept (e. g. OS 265-3 and AS 235/K/H
systems). The remote bus connection unit (cf. page 4/11 must be
used in all other cases and provides electrical isolation together
with the bus converters UI (page 4/9).
The module handles the following duties connected with data
transmission:
Collection of parameters and processing of input/output in-
structions on the I/O interface channel of the SICOMP M mini-
computer
Signalling of operating s tatuses and faults with defined 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 minicomputer.
The interface processor of the modules is an SAB 80186 chip
with a 32-kbyte program memor y (EPROM) and 8-kbyte data
memory (RAM).
Mode of operation
Handling of
messages
Depending on the type and parameterization of the communica-
tion instructions, the interface module N16-M transmits and re-
ceives protected messages of various lengths up to 128 byte
via the serial bus. A message can be sent to a single bus par-
ticipant, to several participants or to all participants.
Apart from certain cyclic messages, the receiver acknowledges
every message received.
The transmitter is immediately informed when a message has
been received without faults. In certain cases, the required data
are also transmitted immediately with this feedback, thus enab-
ling short reaction times.
The interface module N16-M stores the messages in its trans-
mitter and receiver buffers until they are processed and trans-
mitted and thus dynamically decouples the OS 265-3 system or
the SICOMP M minicomputer from the data transfer on the bus
during times of peak loading. To reduce the time required for
organizational tasks, the interface module collects several mes -
sages over a specific period and combines these into a pack-
age. This is not the case if short reaction times are required.
In addition to the data messages, the interface module also
generates and processes organizational messages together
with the other interface modules on the CS 275 bus system.
These are required, for example, to transfer the master function,
for routing information, redundancy tests, monitoring and signal-
ling information.
Time synchr
onization
The interface module receives time messages and routes these
on to the OS 265-3 system or SICOMP M minicomputer. In the
opposite direction, it can also receive the time from the
OS 265-3 system or SICOMP M minicomputer and transmit it on
the bus in order to synchronize the participants.
Diagnostic
functions
The interface module detects and signals static and dynamic
faults and any states which could be critical for the bus loading.
It monitors the processes on the bus, on the interfaces to the
user system and in the interface module itself.
During operation, cyclically triggered test programs carry out an
extensive hardware test of the interface module. Faults are
therefore early detected and malfunctions and cumulative faults
are thus prevented. External bus diagnosis via the coupling
software is also possible. The interface module provides a diag-
nostic list with 23 positions which can be read for this purpose.
Technical data
Power supply +5V
-- 1 2 V
Current consumption
With + 5 V
With -- 12 V
2.8 A
0.05 A
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 col lector, asymmetric,
for connection of a cable connector
with metal front plug and contact points
Weight Approx. 0.55 kg
Ordering data
Order No.
Inter fa ce module for 20-m loc a l bus (N16-M ), 6DS1 205-8AA
16 bit
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