Manual
YSI 5X00
139
YSI 5X00
138
- One relay can be assigned to multiple systems. It is essential that the relay
conguration be veried in order to avoid conict of operation of wired relay
devices. Assigning one relay to multiple systems can result in invalid operation.
Control Mode and Alarms
Menus → Sensor Setup → Aux 1-6 →Control Mode
→ DO 1-4 →Control Mode
Congure DO, Aux analog and Aux temperature systems to control and alarm at
user congured values to best manage your aquatic system. Sensors and aux analog
devices report values to the 5X00. Wire and congure peripheral devices (outputs) to
turn on and o in order to maintain certain water conditions as close to the setpoint
as possible. 5X00 instruments have two control modes. ey are Set Point control
and PID/PWM control. In both control modes a set point is congured. Congure
the set point to the ideal system value.
When a system is operating in Set point control mode control relays energize when
a user congured control value is reported to the 5X00 from the input sensor or
device. e control relay remains energized until the the system set point value
is processed by the 5X00.* In contrast, when a system is operating in PID/PWM
control mode there are no user congured control values. Control relays energize
anytime a value is reported that is away from the set point. (See PID/PWM up/down
control conguration -page 144). e control output relay on time is proportional
to certain conditions and values being reported to the 5X00.
Set point and PID/PWM control are discussed in more detail in following sections.
See Setpoint control beginning on page 139 and PID/PWM control beginning on
page 143.
*exception - high temperature may also be congured for a timed set point mode
- see page 151.
Notes:
- Aux digital systems do not have set point or PID/PWM control modes. See
page page 147 for complete aux digital conguration information.
- Sensor Setup menu selections change based on the congured control mode.
- Changing control method between PID/PWM and Set Point may result in
invalid set point, control and alarm value congurations. Always reconrm
control menus conguration when control mode is changed.
Set Point Control
Set point control menu options are shown below for an aux analog system.
Control relays congured in the Set Point control mode energize when a user
congured control value is received from the input device and is processed by the
5X00. Control relays can be congured to raise and/or lower DO, temperature, and
analog aux device systems. High temperature control may also be congured for
a timed set point mode - see page 151. Congure high and/or low alarm systems
to activate peripheral devices and/or to provide alarm notication messages when
alarm condition(s) exist. Congure values outside of acceptable operating control
range as high and low alarm values.
Set Point Control Values
Range low and Range high values set the acceptable operating range for the water
system. Control system(s) do not become active when value(s) are within accept-
able control range. See gure 4.8 - page 140. Enabled control relays energize when
the sensor reports a value ≤ the range low control value or ≥ range high control
value. Control relays are typically wired to devices used to raise or lower certain
water parameters in order to maintain the system as close to set point as possible.
Control relays remain energized until the sensor reports a value ≤ set point (when
dosing down to lower specific water parameter) and/or ≥ set point (when dosing
up to raise specific water parameter). Exception - temperature high timed set point
control - page 151. Sensor low control range starts at -1 signicant digit below set
point value. High control range starts at +1 signicant digit above set point value.
Figure 4.8 shows how the 5X00 operates based on a set point control sensor setup
conguration. In the example provided DO range low and range low 2 devices will
energize at ≤ 5.0 and ≤4.0 respectively. e alarm low system becomes active at ≤3.5.
Conguring the 5X00
Conguring the 5X00