Installation guide

Estimating Network Performance
890 USE 100 00
77
Step 1 When the peer processor in unit A acquires the network token, it
transmits any other application messages it has pending, and then
passes the token. Every other node on the network reads the global
data contained in the token frame and places a copy of it in its peer
processor.
Step 2 each other controller on the same network, an MSTR function pro-
grammed to Read Global Database can read the new global data.
The time required to process the complete communication would be:
Event T ime Range A verage Time W orst Case T ime
1 0 ... 1 token rotation 1/2 token rotation 1 token rotation
2 0 ... 1 scan, unit B ... n 1/2 scan, unit B 1 scan, unit B