Hydrovar Pump Controller Installation & Operation Manual
Hydrovar Pump Controller Installation & Operation Manual
Hydrovar Pump Controller Installation & Operation Manual
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Programming<br />
0555 0555 SWITCH INTV Switch interval for lead / lag alternation<br />
24 hours (for cascade serial / synchron only!)<br />
Possible settings: 0 – 250 hours<br />
This parameter allows an automatic change over of the master pump and the assist pumps, to provide<br />
even wear and achieve even operating hours of the pumps.<br />
The switch interval is used for HYDROVAR Master Inverters only (connected via the RS-485 interface) by<br />
using operation mode Cascade Serial or Cascade Synchron.<br />
Synchronous Control<br />
By using the synchronous control mode all pumps in the system maintain the set pressure by running at<br />
the same frequency.<br />
The 2nd pump starts, when the 1st pump reaches the ENABLE FRQ. [0515] and the system pressure drops<br />
below ACTU. VAL. DEC. [0510] -> both pumps will run synchronously.<br />
The assist pump will stop, when the frequency drops below the set SYNCHR. LIMIT [0560]. This function<br />
creates a hysteresis effect which prevents the assist pump against a frequent on/off operation.<br />
To determine the correct setting:<br />
• Start the first pump in JOG Mode [62]; Increase the frequency till you reach the required value. Check<br />
the frequency ( = f0 ) at zero consumption<br />
• Set the synchronous limit (f0 + 2..3 Hz)<br />
• Set the synchronous window between 1 or 2 Hz (depending on the pump curve and set point).<br />
0560<br />
0560 SYNCHR. LIM.<br />
0.0 Hz<br />
Frequency limit for synchronous control<br />
Possible settings: 0 .0 Hz - Max. frequency<br />
This parameter is used for switching off the first assist pump in synchronous mode. If the frequency of<br />
both pumps drops below this selected value, the first assist pump stops.<br />
0565 SYNCHR. WND.<br />
0565<br />
2.0 Hz<br />
Possible settings: 0.0 – 10 Hz<br />
Frequency limit for switching off the next assist pump.<br />
E.g. switching off the 3RD PUMP:<br />
Frequency window for synchronous control<br />
All 3 pumps are running at a frequency < SYNCHR. LIM. [0560] + SYNCHR. WIN. [0565]<br />
Or: switching off the 4TH PUMP:<br />
All 4 pumps are running at a frequency < SYNCHR. LIM. [0560] + 2x SYNCHR. WIN. [0565]<br />
60<br />
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