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HE 5750 Operating Instructions
#371627 Version 1.1
9.6.1 Parameter description (parameter groups 13-19)
Parameter
Description
13 Malfunction monitor
13.1 Delta-p Low Alarm
Negative values stand for a reversed air flow. The
sensor must be able to provide negative values for this function.
13.2 Delta-p High Alarm 1
Pressure threshold for Delta-p Alarm 1
13.3 Delta-p High Alarm 2
Pressure threshold for Delta-p Alarm 2
13.4 Pressure High Alarm
System Pressure High Alarm
13.5 Minimum pressure
Pressure in the local manifold compared to system pressure,
which is mandatory for the valve triggering.
13.6 Pressure drop
The pressure drop after a valve triggering is normal and is evaluated to
monitor the proper operation. Positive: an absolute pressure drop related
to the system pressure Negative: a relative pressure drop related to the
pressure prior to the valve triggering.
13.7 Lock manifold
Yes: during ‘System Pressure Low’ the manifolds are locked.
13.8 Dust increase
Positive values stand for the absolute dust level of the sensor. Negative
values stand for the dust increase within a certain time and ignore the
increasing contamination of the sensor.
0 = dust signal as switch
contact.
13.9 Dust monitoring type
The ‘Dust too High’ message can be linked to the pulse signal to locate a
destroyed filter hose. In a delay of the ‘Dust too High’ signal, already
another valve can have been triggered, which then leads to a wrong
information. In order to avoid that an unspecific ‘Dust too High’ message
can be sent with ‘Permanent’ from the master control.
perm; digital input
dust increase = 1 %
perm; digital input
dust increase
= 2… 100 %
perm; analog input
dust increase = 2 .. 100 %
act.pulse; analog input dust increase = -1 .. -100 % for relative values
dust increase = 1 .. 100 % for absolute values
13.10 Dust delay
Blinds out the increased dust output on the outlet side during the
cleaning and shortly afterwards.
13.11 Valve current
If two valves are operated at one output, and a valve has an interruption,
this will not be recognised by the malfunction monitor of the valve
controller. A minimum flow for 2 valves is set here, and in case of a drop
this means a fault of a valve.
By setting 0.1A this monitor is switched-off.
13.12 Odd valve count
Is important only, if two valves per output are connected. For the power
monitor not to report a valve error during an odd number of valves, the
slave must be mentioned
0: none Slave1; 2: Slave2; 3: Slave1 and Slave2
13.13 Hold function
No:
alarm is reversed when the cause is removed
Yes:
alarm is held and requires an acknowledgement.
13.14 Fail-Safe
Logic value of alarm messages.
No:
high for active alarms
Yes: low for active alarms
Applies also for signal level in data communication
14 Dust monitoring
