12
1.4 Communication Specifications
Item
Specifications
Reference clock
40 or 80 MHz (depends on the system)
Transmission speed
2.5M, 5M, 10M, 20Mpbs
Communication code
NRZ
Communication protocol
Motionnet (Local network system by Nippon Pulse Motor)
Communication system
Half-duplex communication
Communication I/F
RS-485, pulse transformer
Connection method
Multi-dropped
Transmission distance
50m
Number of local devices
connected
32
Time per cyclic
communication
At 20Mbps:
8 local devices on one line
.... 0.12ms
16 local devices on one line
.... 0.24ms
32 local devices on one line
.... 0.49ms
Data communication time
Transmission of 3 words (writing to one register
in a motion device) .... 19.3μs (Note 1)
Communication data size
1 to 64 words / frame (Note 2)
Measures for communication
cable disconnection
With motion stop upon detecting disconnection
Note 1: 1 word = 2 bytes = 16 bits
Note 2: 1 to 3 words for machines with G9003 installed (P module)
Table 1.4-1 Communication specifications
Содержание motionCAT HCPCI-MNT720M
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Страница 12: ...1 Warnings and Precautions...
Страница 20: ...9 1 motionCAT Installation...
Страница 109: ...98 4 Installation Guide...
Страница 118: ...107 5 Device Driver Installation...
Страница 122: ...111 6 Trial Operation...
Страница 145: ...134 7 Accessories...
Страница 147: ...136 8 Glossary...
Страница 161: ...150 9 Connections to Drivers Supplied by Manufacturers...