42
MDS NETio-TB Installation & Operation Guide
05-4801A01, Rev. A
Note that pressing the spacebar will cycle through two AI
choices for Analog and six DI choices for Discretes. This is due
to the maximum capacity for Analog inputs and Discrete inputs
on any NETio Module.
3.5 FAILSAFE SETTINGS
NETio Failsafe settings allow configuration of the output signal’s
behavior in the event of loss of communication. By definition, any
output signal a NETio module has been configured to generate relies on
one or more of these communication modes:
1. WeXP—Wireless communication between Wireless Expansion
Modules and a NETio Base Module within a NETio Unit.
2. NETio Backplane—Wired communication between a Base Module
and Expansion Modules using the NETio Backplane/power Connec-
tors.
When any one or more of these communication modes fails for a con-
figurable period of time, an output will enter Failsafe mode and generate
the Failsafe value selected by the user. The user can accept the factory
settings or modify them, but Failsafe behavior is always activated for an
output signal.
3.5.1 Configuring Failsafe Settings
Figure 3-11
shows the Analog Output menu with a field for
Failsafe
Mode
.
Invisible place holder
Figure 3-11. Analog Output Menu
For an Analog Output the Failsafe Mode options are:
HIGH
—Set output to the highest value in the range.
LOW
—Set output to the lowest value in the range.
LAST
—Holds last value output prior to communication failure.
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