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Building Technologies Division
Basic Documentation LME7...
CC1P7105en
Infrastructure & Cities Sector
27 PWM settings
29.11.2011
27.5 Overview of PWM fan parameters
(value range refers to PME71.901)
Parameter-
Designation
Value range
Step size
*)
Conditions
number
Min.
Max.
403.00
Fan speed: Ignition load speed (P0)
800
9000
10 rpm
Factory setting 3000 rpm
403.01
Fan speed: Low-fire speed (P1)
800
9000
10 rpm
Factory setting 1200 rpm
403.02
Fan speed: High-fire speed (P2)
800
9000
10 rpm
Factory setting 5700 rpm
503.00
No-flame speeds PWM fan: Standby
speed
0
9000
10 rpm
0 up to max. speed
503.01
No-flame speeds PWM fan: Purge speed
800
9000
10 rpm
< max. speed
516.00
Limit speed ignition load P0: Min. limit
800
9000
10 rpm
P1min < P0min < P1max
516.01
Limit speed ignition load P0: Max. limit
800
9000
10 rpm
P0max < P1max
517.00
Limit speed low-fire P1: Min. limit
800
9000
10 rpm
---
517.01
Limit speed low-fire P1: Max. limit
800
9000
10 rpm
P1max < P2min
518.00
Limit speed high-fire P2: Min. limit
800
9000
10 rpm
P2min > P1max
518.01
Limit speed high-fire P2: Max. limit
800
9000
10 rpm
P2max > P2 min
519
Max. speed fan
3000
9000
10 rpm
Factory setting 5830 rpm
522
Ramp-up low-fire
high-fire
2.058
74.970
0.294 s
Factory setting approx. 15 s
523
Ramp-down high-fire
low-fire
2.058
74.970
0.294 s
Factory setting approx. 15 s
559
PWM mode
0 = open loop control
1 = PID control
2 = safety mode (PWM limits)
0
2
1
Factory setting 1 (control)
560
Mode: Pneumatic ratio control
0 = OFF
1 = PWM fan
2 = air damper actuator
0
2
1
Factory setting 1 (PWM fan)
644
Number of pulses per revolution
2
5
1
Factory setting 3 (Hall pulses/rev)
646
Settling time for speed assessment
1.029
2.058
0.147 s
Factory setting 2.1 seconds
650.00
Speed tolerance band: Speed shutdown
1
5
1%
Factory setting 1%
650.01
Speed tolerance band quick speed
shutdown
1
10
1%
Factory setting 3%
658.00
PWM values fan: Start PWM
1
100
1%
Factory setting 25%
658.01
PWM values fan: Min. PWM
0
20
1%
Factory setting 0%
658.02
PWM values fan: Max. PWM
80
100
1%
Factory setting 100%
659.00
Ramp time of fan: Min. low-fire to high-fire 0
74.970
0.294 s
Factory setting 2.058 seconds
659.01
Ramp time of fan: Max. low-fire to high-
fire
0
74.970
0.294 s
Factory setting 74.970 seconds
659.02
Ramp time of fan: Min. high-fire to low-fire 0
74.970
0.294 s
Factory setting 2.058 seconds
659.03
Ramp time of fan: Max. high-fire to low-
fire
0
74.970
0.294 s
Factory setting 74.970 seconds
660
Tolerance time speed deviation
0
37.485
0.147 s
Factory setting 4.998 seconds
674
Neutral band (permitted control offset)
0
255
1 rpm
Factory setting 40 rpm
675.00
PWM: Min. PWM with prepurging, SEC
0
100
1%
Factory setting 86%
675.01
PWM: Max. PWM with ignition load, SEC
0
100
1%
Factory setting 34%
676
Gain factor speed control
0
255
1
Factory setting 112