User`s guide

Copyright © 2004 EIM COMPANY, INC. • 13840 PIKE ROAD • MISSOURI CITY, TX. 77489
Page 98
Controlinc 1746-C (Version 5.21) Network Master Users Guide (2004-11-18)
SAMPLE NETWORK (physical wiring):
Scenario 1: Break network at Actuator [4] – port A (between actuators 3 & 4)
In this case, the 1746-C must communicate with
• actuators 1 – 3 via port 2 and
• actuators 8 – 4 via port 1.
This means that there would be problems communicating on
• port 2 with actuators 8 – 4 and
• port 1 with actuators 1 – 3.
This means that in table [1], there would be the following values:
• “2” in the locations for actuators 8 – 4
• “1” in the locations for actuators 1 – 3.
Since all actuators could communicate, Bit-14 in table [2] would be clear for all actuators.
Scenario 2: Break network at (Actuator [4] – port A.) & (Actuator [6] – port B)
In this case, the 1746-C must communicate with
• actuators 1 – 3 via port 2 and
• actuators 8 – 7 via port 1 and
• actuators 6 – 4 cannot communicate.
This means that there would be problems communicating on
• port 2 with actuators 8 – 7 and
• port 1 with actuators 1 – 3 and
• both ports with actuators 6 – 4.
This means that in table [1], there would be the following values:
• “2” in the locations for actuators 8 – 7
• “1” in the locations for actuators 1 – 3.
• “3” in the locations for actuators 6 – 4.
Bit-14 in table [2] would be set = “1” for actuators 6 – 4. It would be clear for the rest of
them.
A A
A B
B
B A
1 B
2 A
NIU
1746-C
A
B
B B
B A
A
A B
8 7 6 5
1 2 3 4