64 Program features
Protective functions
Pressure monitoring
The control program contains protective functions for two-level analog or single-level
digital pressure monitoring of both the inlet and outlet of the pump.
In analog monitoring, whenever the pressure being monitored meets the first limit, the
drive indicates a warning, trips on a fault, or starts to follow a pre-defined reference.
When the second limit is met, the drive either stops or trips on a fault.
In digital pressure monitoring, one limit is observed. Whenever the limit is met, the
drive indicates an alarm, trips on a fault, or starts to follow a pre-defined reference.
Flow monitoring
The control program has a monitoring function for flow that can be configured to
generate an alarm or a fault whenever the flow falls below or rises above predefined
limits.
The flow can either be calculated or measured using a flow meter connected to, for
example, an analog input.
Application profile monitoring
The application profile monitoring function can be used for long-term supervision of
an actual signal. If the selected signal remains above the supervision limit for a
specified time, an alarm is generated.
For example, monitoring the deviation between the PID controller setpoint and actual
value (parameter 04.04 Process PID err) gives an indication of the general condition
of the pump, piping and valves. On the other hand, the PID controller output
(parameter 04.05 Process PID out) remaining at 100% for a long time would indicate
a leak in the outlet piping.
Settings
Parameter group 81 Pump protection (page 271).
Diagnostics
Parameters 06.20 Pump status word (page 130), 08.20 Pump fault word (page 133)
and 08.21 Pump alarm word (page 134).
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