Red Lion PCU - Manual (Page 22)

CONFIGURATION OF PARAMETERS
As supplied from the factory, the controller parameters have been
programmed to the values listed in the Programming Quick Reference
Tables. The user must modify the values, if necessary, to suit the application.
Operation and configuration of the controller is divided into five distinct
operational/programming modes to simplify the operation of the controller:
Normal Display Mode, Unprotected Parameter Mode, Protected Parameter
Mode, Hidden Function Mode, and Configuration Parameter Modules. See
Figure 11, Operational/Programming Modes.
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Figure 11, Operational/Programming Modes