Cascade Controller Option
■ Service parameters
■ Display information
Parameters 724 through 738 provide operational
information including the number of hours run, cycles,
and the state of the relay for each pump.
Par. 724 - 727 Pump-on time
(PUMP x ON TIME)
Parameter number Pump number
724 Pump 2
725 Pump 3
726 Pump 4
727 Pump 5
Value:
h 0 - 130000
Function:
The relay timer accumulates the hours (h) the pump
has run (the relay switched on). The counter is
updated 10 times per hour which means that cycles
less than 6 minutes are not registered. The hours
can be reset to zero when a pump is replaced since
the cascade controller uses parameter 736, Relay
On Time, to determine cycling patterns.
Par. 728 - 731 Pump cycles
(PUMP x CYCLES)
Parameter number Pump number
728 Pump 2
729 Pump 3
730 Pump 4
731 Pump 5
Value:
No. 0 - 130000
Function:
The cascade controller counts the number (No.)
of times each relay (pump) is switched on. The
cycle counter can be reset to zero when a pump
is replaced.
Par. 736 Relay-on time
(RELAY ON TIME)
Value:
h 0 - 130000
Function:
The relay timer accumulates the hours (h) each relay has
been switched on and is used by the cascade controller
to determine the cycling pattern. This counter cannot
be reset. A new pump will not compensate for older
pumps. The new pump will cycle in regular rotation.
Par. 737 Relay cycles
(RELAY CYCLES)
Value:
No. 0 - 130000
Function:
The relay timer accumulates the number (No.) of
times each relay has been switched on and is used
by the cascade controller to determine the cycling
pattern. This counter cannot be reset.
Par. 738 Calculated intermediate setpoint
(SETPOINTS HM 1 - 7)
Value:
(set by Par. 415) sp 1 - sp 2
Function:
The intermediate setpoint is used internally by
the cascade controller to calculate the system
setpoint. This parameter displays the setpoint for
information. Setpoint data is entered in parameters
418, Setpoint 1, and 419, Setpoint 2.
MG.60.I5.22 - VLT is a registered Danfoss trademark
64
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