Zener ECODRIVE 8000 Installation Manual Supplement page 43

ZENER VARIDRIVE SOLUTIONS
[SETUP for a pressure Control System]
6.
Press STOP
7.
Access the application parameters and find the "Min frequency" menu. Adjust and press ENTER
Low Speed trip
Lo Speed Trip time
20 secs
AC
When the ECODRIVE is operating in solar mode it may track below minimum speed depending on the available power.
This will result in an alarm 'Lo Speed Trip'. It is recommended to configure this under minimum speed protection
where operation below a 'minimum speed' for a prolonged period may cause damage to the pump or motor. The 'LO
SOLAR Q' time adjusted to 1 second and the 'LO SPEED TRIP' time should be changed to 2-3 seconds. This protection
may be modified or removed if required.
Single Phase In
Single Phase In
Disabled
AC
Transducer Scale
Pressure scale
10.0 bar
AC
Required Pressure
Reqd pressure
4.9 bar
AC
Proportional Band
Proportional Band
100%
AC
Integration Time
Integration Time
2.00 sec/r
AC
Idle Mode
(refer to Page 46 for an explanation on Idle Mode)
The ECODRIVE can be configured to turn the pump off when there is 'no flow' (ie. all valves closed). When a 'no flow' condition
is detected (by Flow switch or "Idle threshold - % Load") the ECODRIVE goes into 'IDLE MODE'. When the pressure drops to a
preset level (RESUME PUMPING @ % below SV) the pump restarts. Idle mode can be triggered by either or both, a 'Flow
Switch' connected to input D3( terminal 35) or by monitoring the load and setting the 'Idle Threshold' based on % Load.
IM00130
to stop the motor.
During 'Tracking' only, if the output speed operates below the minimum speed the
ECODRIVE will fault. This setting adjusts the trip time. It should be set as short as possible
to provide the required protection of the pump/motor but longer than the 'LO SOLAR Q
Time'. This is feature is to provide protection for the pump and is the system is correctly
configured system it should not result in a 'LOW SPEED' Trip.
If the Auxiliary AC supply is a single phase supply this parameter must be 'enabled'. For a 3
phase supply change to 'Disabled'.
This is the maximum reading from the pressure transducer. For example a 0-10bar, 4-
20mA transducer the entry here is 10bar
This is the pressure that is to be maintained known as the Set-point Variable or SV. It is
possible to have a set-point that is controlled by an external reference, such as a
potentiometer, switches or other device. Refer to the ZENER 8000 manual to modify this.
(For Tuning of internal PID/pressure controller, see Page 43)
Decreasing the proportional band value amplifies variations from the desired pressure set
point. This causes motor speed changes that reduce the variations. Increasing the
proportional band value diminishes variations from set point and motor speed changes
are reduced. Refer to the trouble shooting section (Page 43) as a further guide to adjusting
this value.
(For Tuning of internal PID/pressure controller, see Page 43)
Decreasing the integrator time accumulates pressure variations faster. This causes motor
speed changes that reduce the variations. Increasing the integrator time accumulates
pressure variations slower and motor speed changes are reduced. Refer to the trouble
shooting section (page 43) as a further guide to adjusting this value.
P a g e
ZENER ECODRIVE® 8000
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