User's Manual

Siemens PLT 130
.
1994
4/2
Interface modules for 20-m local bus (N-AS), 8 bit
Description and ordering data
1 LED (yellow), signals ”maintenance protocol stored”
2 LED (red), signals faults (line protocol faulty, receiver memory overflow)
3 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
4 DIP switch for function and address settings
5 DIP switch for function and address settings
6 Front plug for 20-m local bus
Fig. 4/1 Interface module N-AS for 20-m local bus, 8 bit
Application
To connect an AS 215, AS 235, AS 235 K (6DS1 223-8AC) or
AS 235 H (2 x 6DS1 223-8AA) automation system to the CS 275
bus system.
The module handles all duties specifically connected with data
transmission, including occasional control of data transfer.
Design
Compact subassembly , double height, with 2 base plugs and
one front plug.
Front panel width 30.48 mm = 2 standard slots.
The module can be selected as desired.
Mode of operation
Operational signals and fault
signals
LED W (yellow)
For maintenance staff only. It signals that diagnosis informations
which occured during operation are stored.
LED F (red), signals the following faults:
-- Line protocol faulty , e. g. faulty qualifier signal on the local
bus, parity error in data byte, incorrect message format
-- Receiver memory overflow, e. g. if the bus processor of the
interface module does not correctly read the receiver memory.
-- The bits transmitted on the 20-m local bus are returned via the
receiver for checking. The fault signal occurs if the transmit-
ted and received values differ (bit-by-bit comparison).
LED D (green)
The receiver control unit of the interface modules signals that
data transfer elements are on the bus. The brightness of the
display depends on the number of transfer elements received.
LED M (green)
Signals that the interface module has the master function.
LEDs A and B (green)
Indicate that the interface module is set on bus A or bus B.
Static light signals active bus.
LED T (green)
Signals that the bus processor is busy . The central processor
generates read and write signals. The display goes out if the
central processor enters the STOP status.
Setting of addr
ess
In order to differentiate between the individual interface modules
in the autonomous bus system, each interface module must be
allocated a so-called participant address. In order to differenti-
ate between several autonomous buses connected via bus cou-
plers, each interface module must be allocated a bus address.
These two addresses are set via DIP switches on the front panel
of the interface module.
Technical data
Power supply DC 5 V
Current consumption 1.4 A
Interfaces
-- B a s e p l u g
-- Front plug
Central unit bus, 8 bit
Redundant 20-m local bus output,
open col lector, asymmetric,
for connection of a cable connector
with metal front plug and contact points
Weight Approx. 0.4 kg
Ordering data
Order No.
Interface module for 20-m local bus (N-AS),
8bit
¯ for AS 215, AS 235 and AS 235 K
automation systems
6DS1 223-8AC
¯ for AS 235 H automation system 6DS1 223-8AA
Instructions
Interface module for 20-m local bus Order No.
N--AS and N--BK
German C79000--B8000--C406
English C79000--B8076--C406
French C79000--B8077--C406
Spanish C79000--B8078--C406
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This catalog is out of date, see note on page 2