Omron NS7 Series Setup Manual page 204

@ Controller Link Specifications (with NS-CLK21 Controller Link Interface
Unit Mounted)
Item
Communications N:N token bus
method
Code Manchester code
Modulation Baseband code
Synchronization Flag synchronization (conforming to HDLC frames)
Transmission path Multidrop (bus)
type
Baud rate and The maximum transmission distances depends on the baud rate
maximum transmis- setting as follows:
sion distance
Media Specified shielded twisted-pair cable
2 signal lines and 1 shield
Connections to PLCs
nodes Personal computers: Connected via special connector (provided)
Max. number of 32 modes
nodes
Communications Data links and message service
functions
· Transmission area per node:
Number of data link
words
· Send/receive data link areas per SYSMAC CS-series PLC:
· Send/receive data link areas per SYSMAC C200HX/HG/HE,
CVM1, or CV-series PLC:
· Send/receive data link areas per personal computer:
· Total send data link words on entire network:
Data link areas Bit (CIO, and LR Area) , data memory (DM Area) , expansion data
memory (EM Area)
Message length 2,012 bytes max.
· Polling unit backup function
RAS functions
· Self-diagnosis (hardware check at startup)
· Internode tests and broadcast test (via FINS commands)
· Watchdog timer
· Error log
Error correction Manchester code check
CRC check (CCITT X
Specification
2 Mbits/s: 500 m
1 Mbits/s: 800 m
500 Kbits/s:1 km
: Connected via terminal block
1,000 words max. (2,000 bytes)
12,000 words max. (24,000 bytes)
8,000 words max. (16,000 bytes)
32,000 words max. (64,000 bytes)
32,000 words max. (64,000 bytes)
16 12 5
+X +X +1)
Appendix 2 Specifications
A-9