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Chapter 7: Computer Link Function
7
(2) Participating node management table
The participating node management table contains data related to the nodes currently participating
in the network.
Participating node management table
- "0x1ff" is the hexadecimal notation for 1FF(HEX).
- For details about the participation node management table maintained by the JW-50FL, see
page 10-6.
(3) Network management table
The network management table contains information common to the network.
Network management table
- For details about the network management table maintained by the JW-50FL, see page 10-6.
Item
Number
of bytes
Description
Node number 1 byte 1 to 254
Upper layer status 2 bytes RUN/STOP/ALARM/WARNING/NORMAL
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)
Allowable refresh cycle time 2 bytes In units of 1 msec.
Token monitor time 1 byte In units of 1 msec.
Minimum separation of frames 1 byte In units of 100 µsec.
Link status 1 byte Participate/leave
Item
Number
of bytes
Description
Token latch node number 1 byte Currently token staying node.
Minimum separation of frames 1 byte In units of 100 µsec.
Allowable refresh cycle time 2 bytes In units of 1 msec.
Measured refresh cycle time (current value) 2 bytes In units of 1 msec.
Measured refresh cycle time (maximum value) 2 bytes In units of 1 msec.
Measured refresh cycle time (minimum value) 2 bytes In units of 1 msec.