Chapter 7: Computer Link Function
[7] Communication management table
The status of each node is controlled using an individual node management table (maintained by the node itself), a participating node management table, and a network management table.
(1)Local node management table
The settings in each local node management table are controlled by the node itself.
Local node management table |
|
|
|
| |
Item | Number | Description |
|
| |
of bytes |
|
| |||
|
|
|
| ||
Node number | 1 byte | 1 to 254 |
|
| |
|
|
|
|
| |
Area 1 of common memory: Data top | 2 bytes | Word address (0 to 0x1ff) |
|
| |
address |
|
| |||
|
|
|
| ||
|
|
|
|
| |
Area 1 of common memory: Data size | 2 bytes | Size (0 to 0x1ff) |
|
| |
|
|
|
|
| |
Area 2 of common memory: Data top | 2 bytes | Word address (0 to 0x1fff) |
|
| |
address |
|
| |||
|
|
|
| ||
|
|
|
|
| |
Area 2 of common memory: Data size | 2 bytes | Size (0 to 0x1fff) |
|
| |
|
|
|
|
| |
Upper layer status | 2 bytes | RUN/STOP/ALARM/WARNING/NORMAL |
|
| |
|
|
|
|
| |
Token monitor time | 1 byte | In units of 1 msec. |
|
| |
7 | |||||
|
|
|
| ||
Minimum separation of frames | 1 byte | In units of 100 µsec. |
| ||
Vendor name | 10 bytes | Vender name |
|
| |
|
|
|
|
| |
Manufacturer name | 10 bytes | Manufacture model name, device name |
|
| |
|
|
|
|
| |
Node name (facility name) | 10 bytes | Node name by user entry |
|
| |
|
|
|
|
| |
Protocol version | 1 byte | Fixed to 0x80 |
|
| |
|
|
|
|
| |
FA link status | 1 byte | Participate/leave |
|
| |
|
|
|
|
| |
Local node's status | 1 byte | Doubled node number detection, etc. |
|
| |
|
|
|
|
|
- "0x1ff" is the hexadecimal notation for 1FF(HEX).
For details about the local node management table maintained by the