National Instruments FP-1001 - Manual (Page 29)

Chapter 3 Feature Set Description
© National Instruments Corporation 3-5 FieldPoint FP-1000/FP-1001 User Manual
HotPnP During Power-Up
Upon power-up, the network module automatically uploads an
electronic data sheet (EDS) from each I/O module in its bank. The
network module then configures each I/O module in the bank to factory
default settings in the module’s EDS, or stored SnapShot settings if the
SnapShot feature is enabled.
HotPnP During Operation
You may need to insert or replace one or more I/O modules in a bank
while your system is operational (power is on and the network may or
may not be active).
Inserting New I/O Modules
When a new I/O module is inserted, the network module automatically
uploads the EDS and configures the I/O module to factory default
settings in the module’s EDS, or to stored SnapShot settings if the
SnapShot feature is enabled. This configuration is accomplished
without any intervention from the host computer or software.
While one or more new I/O modules in a bank are being serviced by the
HotPnP feature, the other I/O modules in the bank remain fully
operational and accessible on the network without any interruptions. As
soon as the network module configures the new I/O module via the
HotPnP service, that I/O module becomes automatically accessible on
the network.
Replacing I/O Modules
When an I/O module is removed, the network module does not
undertake any special course of action for the bank. The host computer
(or the software executing on it) may be unaware that the I/O module is
missing, and may continue to send commands to the missing I/O
module. Each command returns an error response, but the network
module remembers the commands sent to the missing I/O module.
When a new I/O module is connected in place of the one that was
removed, the network module first verifies that the replacement I/O
module is compatible with the one that was removed. If the I/O module
is the same as, or is compatible with, the one removed, the network
module configures the replacement I/O module with its predecessor’s
configuration and output value settings. It also applies the effects of any
commands sent by the host computer while the I/O module was missing.