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Файл:AnyBus-S Modbus Plus.rev1.31.pdf
FIELDBUS APPENDIX - ANYBUS-S MODBUS PLUS DOC. NO ABS-MBP-1.31
2002-08-09
1.2 Technical Features for Modbus Plus
Table 1: Summary technical features
Summary Technical Features Modbus Plus
• |
Transmission Techique: |
|
• Medium Access: |
|
RS-485 twisted pair cable (1 pair + Shield) |
Token bus |
|
|
Transmission rate 1 M bits/s |
|
• Two different data types: |
• |
Bus length: |
|
Peer-to-peer communication between net- |
|
Bus up to 2000 m (with repeaters) |
|
work device, Modbus commands.- Global |
• Max. bus cable length: |
|
Data |
|
|
Max. length of network trunk: 500m |
|
• Maximum number of I/O: |
• |
Max amount of nodes: |
Nodes |
32 words / slave (in the same network). |
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/ Network: 32 (with repeaters 64 nodes). |
|
|
|
|
|
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Figure 2: Nodes on a Modbus Plus network
4 |
HMS INDUSTRIAL NETWORKS AB |
FIELDBUS APPENDIX - ANYBUS-S MODBUS PLUS DOC. NO ABS-MBP-1.31 2002-08-09
HMS INDUSTRIAL NETWORKS AB |
5 |