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7-13
Chapter 7: Computer Link Function
7
[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
- "0x1ff" is the hexadecimal notation for 1FF(HEX).
For details about the local node management table maintained by the JW-50FL, see page
10-5.
Item
Number
of bytes
Description
Node number 1 byte 1 to 254
Area 1 of common memory: Data top
address
2 bytes Word address (0 to 0x1ff)
Area 1 of common memory: Data size 2 bytes Size (0 to 0x1ff)
Area 2 of common memory: Data top
address
2 bytes Word address (0 to 0x1fff)
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.
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.