Xylem 19 001 300 R2 Silent Storm VFD Pumping System OMRON Touch Screen Display Manual - Manual (Page 142)

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138 Omron Touch-Screen Display
The following table gives you the bit sum to enter for each pump defined under registers N61:0 to
N61:3:
Pump # Bit Sum
1 2
2 4
3 8
4 16
5 32
6 64
7 128
Example 1: You have three 75 HP main pumps, all of which can run on a VFD. You want all 3
pumps to be interchangeable and the pump with lowest hours should come on first.
You would set N61:0 to 14. This is the sum of the bits for the 3 pumps (2 + 4 + 8 from the table
above).
In this example, you would set your combos according to the following table:
Combo 1 Pump 1 Either Pump 1, 2, or 3 on the VFD
Same as above but with the pump with
Combo 2 Pumps 1& 2
Combo 3 Pumps 1, 2, & 3
the lowest hours set up as an
across-the-line lag pump
Same as above with the pump with the
highest hours set up as an
across-the-line lag pump.
Example 2: You have two 75 HP main pumps that can run on a VFD, or across-the-line. You
have two 60 HP main pumps that can run across-the-line only.
N61:0 is the first lead group. You would enter 6 for the first 2 pumps (2 + 4 from the table
above).
N61:1 is the second lead group. You would enter 24 for the pumps 3 and 4 (8 + 16 from the table
above).
In this example, you would set your combos according to the following table:
Combo 1 Pump 1 Either Pump 1 or 2 on the VFD
Either Pump 1 or 2 on the VFD with the
Combo 2 Pump 1& 2 non-VFD pump set to come on
across-the line pump