Powerup Autoconfiguration Of The Niu - GE VersaPoint IC220PBI002 User Manual

7

Powerup Autoconfiguration of the NIU

The NIU's baud rate and I/O module map are automatically set when the
NIU powers up.
On powerup the Profibus NIU identifies the baud rate setting of the Profibus
master and automatically adjusts to match. The NIU can communicate at
network speeds of 9.6kbps to 12mbps.
The NIU also identifies the modules attached to it during powerup. If
modules are added or removed (not recommended with station power
applied) the change will not be reflected in the NIU's configuration until a
station power cycle is executed – it will be reflected by the NIU's diagnostics
LED's (see Chapter 6). It is important to note that once this configuration
change is made, the Profibus master configuration must also be changed.
Failure to do so will result in loss of communications.
7-2 VersaPoint™ I/O System Profibus-DP NIU User's Manual – August 2005 GFK-1911B