Omron CS1W-CLK12-V1, Operation Manual

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CS-series Optical Bus Controller Link Units Appendix C
Communications Specifications
Optical Ring System
Note 1. The maximum distance between nodes depends on the connector and cable processing methods.
2. The CS-series PLCs do not have an LR area, but CIO 1000 through CIO 1199 are used automatically
in place of LR 000 to LR 199.
Items Specifications
Communications method N:N token bus
Code Manchester code
Modulation Baseband code
Synchronization Flag synchronization (conforms to HDLC frames)
Transmission path form Daisy-chain
Baud rate 2 Mbps
Maximum transmission dis-
tance 20 km
Maximum distance
between nodes Crimp cut: 800 m
Adhesive: 1 km (See note 1.)
Media H-PCF cable (optical two-core cable)
Node connection method Connected via a special (full-lock connector) connector. (A half-lock connector can also be
used.)
Maximum number of nodes 32 nodes
Communications functions Data links and message service
Number of data link words Transmission area per node: 1,000 words (2,000 bytes) max.
Data link area in one PLC (CS-series PLC) (send/receive):
12,000 words (24,000 bytes) max.
Number of data link words in one network (total transmission):
32,000 words (64,000 bytes) max.
Data link areas Bit areas (IR, AR, LR (See note 2.), CIO), data memory (DM), and extended data memory
(EM)
Message length 2,012 bytes max. (including the header)
RAS functions Polling node backup function
Self-diagnosis function (hardware checking at startup)
Echoback test and broadcast test (using the FINS command)
Watchdog timer
Error log function
Node bias function
Error control Manchester code check
CRC check (CCITT X
16
+ X
12
+ X
5
+ 1)