Siemens SED2 User Manual download pdf (Page 126)

SED2 VFD Parameter Reference Guide

118 Siemens Building Technologies, Inc.

P2374 Motor staging delay Level 3

Min: 0 Def: 30 Max: 650

Unit: s

Details:

Time that PID error P2273 must exceed motor staging hysteresis P2373 before

staging occurs.

P2375 Motor destaging delay Level 3

Min: 0 Def: 30 Max: 650

Unit: s

Details:

Time that PID error P2273 must exceed motor staging hysteresis P2373 before

destaging occurs.

P2376 Delay override Level 3

Min: 0.0 Def: 25.0 Max: 200.0

Unit: %

Details:

P2376 as a percentage of PID setpoint. When the PID error P2273 exceeds this

value, a motor is staged/destaged irrespective of the delay timers.

P2377 Delay override lockout timer Level 3

Min: 0 Def: 30 Max: 650

Unit: s

Details:

Time for which delay override is prevented after a motor has been staged or

destaged.

This prevents a second staging event immediately after a first, being caused by

the transient conditions after the first staging event.

Note:

The value of this parameter must always be larger than staging hysteresis

P2373.

P2378 Staging frequency f, %fMax Level 3

Min: 0.0 Def: 50.0 Max: 120.0

Unit: %

Details:

The frequency as a percentage of maximum frequency. During a (de) staging

event, as the SED2 ramps from maximum to minimum frequency (or vice versa)

this is the frequency at which the relay (DO) is switched.

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Siemens SED2 User Manual Page 126