Omron CVM1-CLK21, Operation Manual

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7
Specifications and Configurations Section 1-2
1-2-2 General Specifications
General specifications are the same for the C200HX/HG/HE, CS-series, CJ-
series, CVM1, CV-series, and CQM1H-series PCs.
1-2-3 Communications Specifications
Wired System
Note The maximum distance between nodes depends on the connector and cable
processing methods.
Items Specifications
Communications method N:N token bus
Code Manchester code
Modulation Baseband code
Synchronization Flag synchronization (conforms to HDLC frames)
Transmission path form Multi-drop bus
Baud rate and maximum
transmission distance The maximum transmission distance varies with the baud rate as follows:
2 Mbps: 500 m
1 Mbps: 800 m
500 Kbps: 1 km
Media Specified shielded twisted-pair cable
Number of signal lines: 2, shield line: 1
Node connection method PC: Connected to a terminal block
IBM PC/AT or compatible: Connected via a special connector (included)
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 C200HX/HG/HE, CVM1, CV-series, or CQM1H-series PC (send/
receive):
8,000 words (16,000 bytes) max.
Data link area in one CS/CJ-series PC (send/receive):
12,000 words (24,000 bytes) max.
Data link area in one IBM PC/AT or compatible (transmission/reception):
32,000 words (64,000 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, 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
Error control Manchester code check
CRC check (CCITT X
16
+ X
12
+ X
5
+ 1)