Zener ECODRIVE 8000 Installation Manual Supplement page 45

ZENER VARIDRIVE SOLUTIONS
[SETUP for a pressure Control System]
Operation and Tuning
• Switch to automatic operation or wire in the "REMOTE" or "pressure control" link into D4(5) to enable automatic
pressure control as per this partial sketch.
1
+5V
• Ensure the pump is ready to start. Allow the pump to start in pressure control mode. If an auxiliary AC supply is
connected, switch to operate from AC supply to perform initial setup of pump control.
•
The ECODRIVE should ramp up in speed and the pressure increase. If the pressure does not increase stop the pump and
investigate.
•
The ECODRIVE will operate the motor and pump to regulate pressure in a stable manner. Ie. the SV should equal the PV
without oscillations.
• Where hibernation (Idle) is configured, turn off all valves and check the system turns off.
For some systems the default regulation parameters may not yield the desired performance. Adjust the Proportional Band Value
and Integrator Time to alter pressure regulation performance. A troubleshooting guide is also below.
Trouble Shooting
Problem
The analogue input reading display found
in the service menu reports no feedback -
0.00mA
In closed loop operation the system is
unstable
PV does not equal the SV
The system responds too slowly
The system oscillates momentarily
Confirm the operation of all controls and the system functions correctly.
1. With Solar Only: Check that the ECODRIVE operates the pump at the desired speed under full sunlight conditions. The
conditions in which solar operation switches on & off, will depend on the PV capacity and the settings. Fine tune as
required.
2. With Solar and Auxiliary AC supply: Check that ECODRIVE operates the pump at the desired speed under full sunlight
conditions. Check that the Auxiliary AC power supply switches in as required. The conditions in which the solar
operation switches on & off, will depend on the PV capacity and the settings. Fine tune as required.
3. Check that all level switches provide the correct operation under all conditions.
4. Check that adequate protection is in place and functions correctly.
IM00130
5 6
D4 EN
Remedy
• The transducer may be wired incorrectly or in reverse polarity.
•
Review the transducer wiring and confirm wires are terminated according
to the required terminal polarity.
•
Set Prop. band value to is highest value.
• Set Integrator time to zero.
•
Operate the system and observe the performance.
• Decrease Prop. band value gradually until the instability returns.
•
Increase Prop. band value 1½ times.
•
For a more detailed stabilisation procedure refer to the section titled "PID
Setup Checklist and Tuning" within the "ZENER8000 Instruction Manual" .
•
A steady state error exists and is removed by using the Integrator time.
• Start with a large value and then decrease it until a satisfactory response
to a SV change is observed.
• Decrease the Prop. band value except if the system becomes unstable.
•
Or decrease the Integrator time.
• Increase the Prop. band value.
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ZENER ECODRIVE® 8000
20/07/2018 3:59 PM