West Control Solutions MRC 9000 - Manual (Page 232)

Edition 3
Rev G
Section 13 13-1
SECTION 13 - CONTROLLERS
When the instrument is specified with the Controller option, in addition to the normal configuring required for the
Recorder functions, other parameters such as CONTROLLERS, SETPOINTS, and TUNING PARAMETERS will
need to be configured in order for the instrument to operate properly.
Along with the above, additional choices will appear in the selection list for certain prompts found elsewhere in
this manual.
The main part of the control capability is provided by the controller “functional block”. The controller “functional
block” is configured in the CONTROLLERS section of CONFIGURATION. The functional block provides the
following capabilities:
1) dual output ON/OFF and PID automatic and manual control,
2) bumpless and balanceless automatic/manual transfer,
3) auto/manual control switching, local/remote switching, and dual setpoint switching,
4) setpoint ramping,
5) “automatic transfer”,
6) slew rate (output ramping), and
7) setpoint selecting.
The main (first), second, and remote setpoint sources are selectable. The actuators for auto/manual control
switching, local/remote switching, and dual setpoint switching, are selectable.
The following items can be selected for display in the “normal display” mode: the “selected setpoint” (which is the
current setpoint value before ramping), the “ramped setpoint” (which is the internal setpoint value, after ramping is
applied, which is used as the control point), and the “% outputs”.
Besides the controller block itself, several other items can be configured, SETPOINTS, CONTROL STATE AC-
CESS, and TUNING. Located in the CONFIGURATION section, SETPOINTS, where setpoints are defined and
labeled, and CONTROL STATE ACCESS, used to configure prompting, accessed by the key, providing
easy assess to the most often used control activities. TUNING PARAMETERS, included as a section of the
SYSTEM PROMPTS, is accessed via the key from the “normal display”.