Siemens SED2 Wartungshandbuch PDF herunterladen (Seite 63)

Chapter 6 – Programming

Siemens Building Technologies, Inc. 55

Parameter Settings for Motor Staging (Commissioning)

In general, the factory settings can be used.

P2371, Selection of external motor configuration

Max. 2 pumps can be added. Possible settings:

0 = Motor staging disabled

(factory default)

1 = M1=1X, M2= , M3=

2 = M1=1X, M2=1X, M3=

3 = M1=1X, M2=2X, M3=

4 = M1=1X, M2=1X, M3=1X

5 = M1=1X, M2=1X, M3=2X

6 = M1=1X, M2=2X, M3=3X

7 = M1=1X, M2=1X, M3=3X

8 = M1=1X, M2=2X, M3=3X

P2372, Enable motor cycling

If this parameter is enabled, one or two motors are switched on or off (during staging, in addition

to the speed-controlled motor) in a specified sequence based on the motor operating hours

(Parameter 2380, Motor hours run).

During staging, the motor having the lowest number of operating hours is first switched on. During

destaging, the motor having the highest number of operating hours is first switched off.

If staged motors are different sizes, the motor size promising to best satisfy the demanded output

is switched on first, regardless of its operating hours, and then the motor based on run hours.

Factory setting: 0 (disabled).

P2373, Motor staging hysteresis

Error, as a percentage of setpoint, which must be exceeded before staging delay starts.

Setting range: 0 to 200%

Factory setting: 20%

P2374, Delay on motor staging

Time that error (P2373) must exceed hysteresis before staging occurs.

Setting range: 0 to 650 seconds

Factory setting: 30 seconds

P2375, Delay on motor destaging

Time that error (P2374) must exceed hysteresis before staging occurs.

Setting range: 0 to 650 seconds

Factory setting: 30 seconds

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Siemens SED2 Wartungshandbuch Seite 63