YSI 5200A - Manual (Page 71)

YSI 5200A
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YSI 5200A
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AquaManager includes a PID Tuning tool which allows simulation of various control
action values and functions. The PID tuning tool should be helpful in mimicking
your system through simulation. The AquaManager PID Tuning tool is explained
in detail in the AquaManager Help System.
PID/PWM Interval control action
Range 1.00 to 999 (seconds)
Configure the interval control action to be the length of time a complete PID/PDW
control cycle takes. The control cycle includes both the control relay output on time
and the control relay output off time. Example: A 10 second control relay on time and
a 10 second control relay off time would represent a 20 second interval time. The 10
second control relay on time would be expected to decrease as the value reaches set
point. Interval, Reset interval and Gain control configurations are all interrelated in
the calculation of the control relay on time as the algothrium calculates the proper
corrective action.
PID/PWM Reset Interval control action
Range 0.00 to 100 (seconds)
Configure the Reset control action to be the rate at which the PID/PWM cycle re-
sets. In other words at what interval the past errors are erased and the PID/PWM
process begins a new cycle using new errors, and not past errors, in the PID/PWM
formula in calculating corrective action. Interval, Reset interval and Gain control
configurations are all interrelated in the calculation of the control relay on time as
the algothrium calculates the proper corrective action.
PID/PWM Gain control action
Range 0.01 to 10 %.
Gain is used to control the percentage of change in the output. Output increases with
greater gain. A high gain results in a large change in the output for a given change
in the error. A gain of “5” results in an additional 5% output relay on time for each
1% increase/decrease of the measurement. Tuning theory and industrial practice
indicate that gain should contribute the bulk of the output change. Interval, Reset
interval and Gain control configurations are all interrelated in the calculation of
the control relay on time as the algothrium calculates the proper corrective action.
PID/PWM Alarm System
Alarm values set the acceptable control range. Enable and configure system(s) alarm
to activate alarm output devices(s), view alarm icons, hear audible alarm and/or
receive alarm notifications sent via email or cell phone (SMS) - page 95. Config-
ure high and low alarm values to set alarm thresholds. Alarm system(s) becomes
Configuring the 5200A
active when value is ≤ low alarm value or ≥ high alarm value. Enabled alarm relays
energize if alarm condition exists for the general alarm hold off time. Alarm relays
are energized until one of the four softkeys
is pressed
regardless of sensor value. Pressing one of four softkeys resets the alarm system.
Alarm systems become active again if, after the alarm hold off period, the alarm
condition still exists. Alarm hold off is configured in the General Alarm menu.
When the General Alarm is enabled, (with or without enabled relay), the general
alarm system becomes active when any system alarm is active. See General Alarm
- 117.
Notes:
- It is important to keep the 5200A at the Run Screen during normal
operation. Alarm functionality (email alarms, activation of enabled
alarm relays, alarm icons, and buzzer) is suspended when 5200A is
not at Run Screen.
- Alarm icon(s) display at the Run Screen when alarm condition(s) exists
for longer than the general alarm hold off time. See Icons - page 70.
- Press at Run Screen to display active sensor and aux system relays.
- to display events created by control and alarm relays - see Event
Log - 107.
- Alarm relays are not energized if the 5200A sensor value reads “Over”
or “Under.”
- See Wire Relays - page 46 for information on wiring alarm output
devices.
30 Second Aux and Sensor System Hold Off
Exiting aux and sensor menus after making certain configuration changes places the
system in a 30 second hold. During the 30 second sensor hold, control and alarm
systems are not active. System(s) becomes active, if, after 30 seconds, the values
are reported in control or alarm range. This 30 second hold off allows sensors and
aux devices time to stabilize before control and/or alarm systems become active.
Example - conductivity sensor menu is entered when dose up system is active and
control relay is energized. Dose up wait time is changed from 15 seconds to 45
seconds. When
to Run Screen is pressed, the conductivity system dose up
wait time is saved. Dose up relay de-energizes regardless of sensor value. Dose up
control relay re-energizes if, after 30 seconds, the value is still in control low range.
Dose up relay will energize for the new configured dose up time.
Configuring the 5200A