User`s guide

Page 100

Controlinc 1746-C (Version 5.21) Network Master Users Guide (2004-11-18)

6.2.6. Bringing Units On-Line After a Power Cycle

ACTUATOR POWER CYCLE

If you cycle power on the actuators, the 1746-C will indicate that the actuators are off line and it will only

bring them back on line during the next diagnostic scan.

COMPLETE POWER CYCLE

When there is a complete power failure to the actuators and Master Station at same time (if power

cycles on the entire system – actuators, PLC & 1746-C), “what happens when” depends upon what

system comes back on line first.

If an actuator comes on line before the 1746-C is out of reset, then the 1746-C will see it when it

performs its network check as it comes out of reset (it will be "on-line"). If the 1746-C comes up

before an actuator, then that actuator will not get "on-line with the 1746-C" until the next diagnostic

scan is performed.

GENERAL

Usually, if any actuators do not start communicating with the 1746-C after it performs its diagnostic

scan, the places to look are outside the 1746-C (the actuators, the interconnecting network, …).