Chapter 4. Configuration
GFK-2737F December 2016 43
4.2.3.4 Configuring Modules with Multiple Modes of Operation
Some PACSystems RX3i modules have multiple modes of operation that change the appropriate limits for
their configuration parameters. For example, an IC695ALG616 analog input module supports a different
set of A/D Scaling Units when in 4 to 20 mA operation than when it is in -10 Vdc to +10 Vdc operation.
These different configuration options are implemented as groups of controls which are activated by a
choice made outside of the group and marked with +/- expander controls. Typically, this choice is directly
preceding the first group.
Figure 11: Analog Module with Multiple Possible Option Settings
Whenever multiple options are available, only those parameters associated with the active choice are
used. The other settings are maintained, but are ignored by the module. To prevent confusion, it is
recommended that only the active choice be expanded.
The state of the expander control does not affect the choice of active parameters. If the active setting is
collapsed and not visible, it is still active and its values are used for the module configuration.
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