Santerno Sinus Penta - Example 2: Pipe Fill Function

PROGRAMMING GUIDE
SINUS PENTA
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Example 2: Pipe Fill Function
The PIPE FILL function avoids water hammer in irrigation pipes. To avoid water hammer, pipes must be filled very
slowly for air drainage. To do so, force a minimum rate reference, thus obtaining the minimum delivery of the pumping
system. Once the min. rate is attained, the feedback starts increasing; when the filling pressure is attained, the system
can start operating under normal conditions. Suppose that the feedback value of the pipe pressure is present at analog
input AIN1.
Table 64: MPL parameterization for Pipe Fill function
P368
MPL3: Digital output mode
DOUBLE ANALOG
P369
MPL3: Selecting variable A
A79: AIN1
P370
MPL3: Selecting variable B
A79: AIN1
P371
MPL3: Testing variable A
<
P372
MPL3: Testing variable B
≥
P373
MPL3: Comparing value for Test A
Pressure value when the system is
empty
P374
MPL3: Comparing value for Test B
Pressure value when the system is full
P375
MPL3: Function applied to the result of the 2 tests
(A) Set (B) Reset
P375a
MPL3: Selecting variable C
D0: Disabled
P375b
MPL3: Function applied to the result of f(A,B) C
P376
MPL3: Output logic level
TRUE
P377
MPL4: Digital output mode
DIGITAL
P378
MPL4: Selecting variable A
D52: MPL3
P379
MPL4: Selecting variable B
P380
MPL4: Testing variable A
P381
MPL4: Testing variable B
P382
MPL4: Comparing value for Test A
P383
MPL4: Comparing value for Test B
P384
MPL4: Function applied to the result of the 2 tests
P384a
MPL4: Selecting variable C
D0: Disabled
P384b
MPL4: Function applied to the result of f(A,B) C
P385
MPL4: Output logic level
TRUE
P009
Acceleration time 1
Ramp for normal operation [*]
P010
Deceleration time 1
Ramp for normal operation [*]
P011
Acceleration time 2
Ramp for PIPE FILL [*]
P012
Deceleration time 2
Ramp for PIPE FILL [*]
P080
Multispeed function
0: Preset Speed
P081
Output speed 1 (Mspd1)
Min. operating speed [*]
C182
MDI Multiprogramming enable
Enabled
C155
MDI for multispeed 0 selection
12: MPL4
C167
MDI for multiramp 0 selection
11: MPL3
C171
MDI for PID disable
11: MPL3
It is required to repeat MPL3 output to MPL4 output, because every MPL may be allocated to maximum 2 functions
(C182 = Enabled – see DIGITAL INPUTS MENU). In that case, 3 functions are required, so an additional output is
needed.
NOTE
[*]
Ramp for normal function = Ramp desired during normal operation.
Ramp for PIPE FILL = Ramp desired when filling the pipes.
Minimum operating speed = Min. speed required for the correct delivery of the pump.