Yokogawa Data Acquisition with PID Control CX2000 User Manual

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IM 04L31A01-01E

Explanation of Functions

#3 Operation-related parameters/Zone PID

Suppressing function, ramp-rate-time unit, SP ramp-down-rate/SP ramp-up-rate, tag,
tag comment, reference point (when zone PID is selected), switching hysteresis
(when zone PID is selected), and reference deviation (when zone PID is selected).

#4 PID parameters

SP, PID constant, output limit, shutdown ON/OFF, manual reset, relay hysteresis
(only during ON/OFF control), reverse/direct, and preset output.

#5 Control group setting

Group name, kind (internal loop/external loop/measurement channel), and number.

#6 Ten-segment linearizer I/O

Input type, mode, and biasing or approximation input/output values.

#7 Program control paramters (only when program control is ON)

#1 Program parameter setting

#1 Pattern initial setting
#2 Wait action setting
#3 Pattern start setting
#4 Program pattern setting
#5 Event setting
#6 Event output setting
#7 Hysteresis (PV event)
#8 Repeat action setting

#2 AUX (Auto message, Display position)

Auto message for program Run/Reset, Program display position, and Auto change
to program run display.

#3 AUX (Event group)

#8 Detailed setting (“#7” when program control is OFF)

#1 Control function

SP tracking, PV tracking, SP limiter, output velocity limiter, and anti-reset windup
auto/manual.

#2 Hysteresis (Alarm)
#3 DIO monitor and operation setting
#4 DI/DO label setting

#9 Control math setting (“#8” when program control is OFF)

#1 PV/SP math, Retransmission
#2 Logic math (#1 when both PV/SP computation and analog retransmission are

inactive.)

#3 Constant (#2 when both PV/SP computation and analog retransmission are

inactive.)

Control Operation Display

In operation mode, the following control operation displays can be shown.
• Control group display

This display is used to monitor the control status of multiple loops simultaneously
including external loops. You can select from three display styles as shown in the
display example in the figure below. If you include the measurement channels for the
measurement function in the group, you can also monitor the measured values on the
measurement channels at the same time on this display.

• Tuning display

This display is used to optimize (tune) the control parameters such as PID constants.

• Overview display

This display is used to monitor the alarm status of all control loops.

1.2 Control Function Overview