West Control Solutions MRC 9000 - Manual (Page 233)

Section 13 Edition 3
Rev G 13-2
Up to 8 setpoints can be configured. Each has a variable text prompt, units, decimal position, limits, and “normal
display” display option. Whenever the PROMPT TEXT, as configured in SETPOINTS, is not blank, the setpoint
will be displayed in the key prompts.
The setpoints are not inherently associated with a controller, so they can also be used for ratios, direct drive outs
(to a current output), or any other purposes. Setpoint changes can be inhibited via the ENABLES and PASS-
WORDS.
The SETPOINTS included in the prompts are the operator changeable values. The setpoints included in
the “normal display” are for display purposes only, and both the currently selected setpoint and the internal
ramping setpoint can be displayed.
Control State Access provides an easy and quick way to change controller states (automatic to manual, local
setpoint to remote setpoint), via the Display key. When the default control actuator settings are used, they affect
the actuators which change the controller states. Note that although the default settings imply a one-to-one
correspondence between control state access numbers and controller numbers, this is not necessarily the case.
Up to four Control State Accesses may be configured and all four are initially set. If all four are not to be used, the
unused should be changed to “blank”.
EXAMPLE:
Let’s consider auto/manual for controller 1 (C1).
The first would be using a remote contact closure input to switch between auto and manual control. This method
requires that an input be used for Switch Contact. To configure, set an unused INPUT TYPE/RANGE to SWITCH
CONTACT (found in INPUTS part of CONFIGURATION), then set C1 MANUAL ACTUATOR to SWx (x= number
of Input Variable set earlier).
A second and possibly more convenient method of changing states would be the “CONTROL STATE ACCESS”
programming capability. The CONTROL STATE ACCESS capability is configured in CONFIGURATION and used
via the key. To configure:
Set C1 MANUAL ACTUATOR, found in CONTROLLERS, to CA1F1. Next, set CA1 LINE 1 TEXT, found in
CONTROL STATE ACCESS, to CONTROLLER 1 (DEFAULT), CA1 LINE 2 TEXT to A/M (DEFAULT) and
CA1 F1 KEY USAGE to C1 AUTO/MANUAL (DEFAULT). NOTE: If only one control is being utilized, it is
suggested that the remaining prompts be blank, otherwise they will be displayed.