Reference
MVI56E-FLN ♦ ControlLogix Platform
User Manual
FA Control Network Ethernet Communication Module
Page 124 of 155
ProSoft Technology, Inc.
Token Flow
Only one token exists in the network.
A frame including a token (token frame) is provided with a destination node
number and node number of token transmitting side. Each node becomes a
token holding node when a match is found with the destination node number of
the received token frame.
The token rotation order is determined in the ascending order of node number.
The node with the largest node number releases a token to the node with the
smallest node number.
Token and Frames
There are six types of frames sent with a token.
1
When there is no cyclic data to be sent, only a token is transmitted.
2
When there is only cyclic data, a token is transmitted together with cyclic
data.
3
When there is only cyclic data and this cyclic data is sent in divided form, only
the cyclic frames are transmitted and a token is attached to the last cyclic
frame.
4
When there is only message data, the message frame is transmitted,
followed by a token.
5
When there is cyclic data and message data, the message frame is
transmitted and then the cyclic frame is transmitted together with a token.
