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ADV100 • Functions description and parameters list 131

11074

(2)

(1)

(3)

  (1)Setpoint

  (2)Feedbackvalue

Example: suppose parameter 11002 Setpointvalof a pump pressure control is 10 bar, 11070 Constpressurethr

is set to 5%, 11074 Constpressoffsetis set to 4% and 11076 Fluidlossthr = 1% with 11078 Fluidlossthrtime

= 0.6 seconds

This means that to move to the constant pressure condition the feedback must be more than 9.5 bar.

We can consider 2 cases for restarting:

Case 1: the liquid leakage causes the pressure to fall by 0.1 bar per second

In this case the change is lower than the set threshold and to restart the drive the feedback must be less than 9.1

bar due to the settings in parameter 11074 Constpressoffset.

Case 2: the liquid leakage causes the pressure to fall by 0.2 bar per second

In this case the change exceeds that set in PAR 11076 Fluidlossthr(0.1 bar every 0.6 secongs). After 0.6 seconds

(from when the constant pressure threshold is exceeded) the pressure feedback is 9.38 bar, a leakage is detected

and the drive is restarted.

ALARMS

Menu PAR Description UM Type FB BIT Def Min Max Acc Mod

 11050 Feedbacklosstime sec FLOAT 0.00 0 10000 RW FVS

This parameter denes the time for recognising the loss of the feedback signal.

The alarm is only recognised if parameter 11004 Feedbackselis set to PAR 1600 Analoginput1Xmonand PAR

1650 Analoginput2Xmon.

The drive recognises the alarm if the feedback signal is equal to zero (no signal) for longer than the time set in PAR

11050 Feedbacklosstime. If this parameter is set to zero, the alarm is not recognised.

Menu PAR Description UM Type FB BIT Def Min Max Acc Mod

 11052 Feedbacklossact ENUM Stop 0 4 RW FVS

This parameter denes drive activity following the recognition of a PerditaretroazPID alarm.

0 Ignore

1 Warning

2 Disable

3 Stop

4 Faststop

Menu PAR Description UM Type FB BIT Def Min Max Acc Mod

 11054 Feedbacklevel % FLOAT 20.000 1.000 50.000 RW FVS

This parameter denes the error level (expressed as a percentage with respect to the set point) for generating the

PIDFBloss alarm.

The alarm is generated when the PID error is higher than the set threshold.

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