
Continuous Control Functions
PID CONTROL BLOCK
2-27
67
Control Mode
(CMS)..........................................................................................................CWR
This is the active controller mode. The controller mode can be represented as a separate
output and setpoint mode, or singly as a controller mode. If controller mode is used, the
following conditions are checked:
• A remote setpoint source must be configured
• Allowed output modes and allowed setpoint are set to M.A and L.R by the configurator
• Setpoint and output modes, restart modes and allowed modes may not be entered by the
user
• Setpoint and output modes and restart modes take on values based on the user entered
value for controller mode/restart mode. These values are:
Controller Mode Output Mode Setpoint Mode
CASCADE AUTO REMOTE
AUTO AUTO LOCAL
MANUAL MANUAL Don’t Care
TRACK TRACK Don’t Care
The control mode states are:
MANUAL 0 The active control mode is manual.
AUTO 1 The active control mode is auto.
CASCADE 2 The active control mode is cascade.
TRACK
3 The active control mode is track (track input signal is asserted and
track value is copied to the output).
FAULT
5 A FAULT mode is entered when the block mode cannot be
determined (e.g., when track command input quality is bad), and can
only be cleared by an operator command.
N/A 15 Configurator entry when setting mode model to SP/OP MODE only.
68
Control Mode Status Quality
(CMSQ)............................................................................. – WR
Control mode status quality is determined by the block state and the mode model.
GOOD 0 Quality when the block is RUN or HOLD and the mode model is
control mode.
BAD 1 Quality when the block is OFF or the mode model is setpoint/output
mode.
69
Control Mode Command
(CMC) .......................................................................................– – R
The control mode command is the mode to which the controller returns after leaving TRACK.
If you are in Track and want to return to a control mode other than the value indicated here,
you must write to the Controller Mode (CMS) whose value will then be reflected here.
MANUAL 0 Controller returns to MANUAL after leaving TRACK.
AUTO 1 Controller returns to AUTO after leaving TRACK.
CASCADE 2 Controller returns to CASCADE after leaving TRACK.
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