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Building Technologies Division Basic Documentation LME7... CC1P7105en
Infrastructure & Cities Sector 27 PWM settings 29.11.2011
27 PWM settings
27.1 Relevant parameters
Note:
Initial parameter settings (also see chapter Initial PWM parameter settings)!
Display depends on program.
Parameter Meaning
Ignition load speed (P403:[0] in ACS410 software):
Corresponds to the ignition load speed in revolutions per minute (rpm).
Prerequisite: P0 ≥ P0min (P516.00), P0 P0max (P516.01)
P0
Note:
Step size of speed when making the setting with operating unit AZL2...: 10 rpm
Step size of speed when making the setting with PC software ACS410: 1 rpm
Low-fire speed (P403:[1] in ACS410 software):
Corresponds to the low-fire speed in revolutions per minute (rpm).
Prerequisite: P1 ≥ P1min (P517.00), P1 ≤ P1max (P517.01)
P1
Note:
Step size of speed when making the setting with operating unit AZL2...: 10 rpm
Step size of speed when making the setting with PC software ACS410: 1 rpm
High-fire speed (P403:[3] in ACS410 software):
Corresponds to the high-fire speed in revolutions per minute (rpm).
Prerequisite: P2 ≥ P2min (P518.00), P2 ≤ P2max (P518.01)
P2
Note:
Step size of speed when making the setting with operating unit AZL2...: 10 rpm
Step size of speed when making the setting with PC software ACS410: 1 rpm
Standby speed:
Corresponds to the standby speed in revolutions per minute (rpm), delivered as a PWM value in
standby (OFF) or lockout position 1! This means that a connected PWM fan ensures purging at this
speed in standby (OFF) or, when using a mains-powered fan, in lockout position 1 as well. In that
case, compliance with the connection diagram of the PWM fan must be ensured!
When using mains-powered fans, following must be observed:
In terms of mains supply, the fan is no longer connected to the LME7... and, in the event of
fault/lockout, will not be disconnected from mains supply
The PWM interface integrated in the fan must ensure safe electrical separation from mains (e.g.
via optocoupler)
No PWM signal is delivered in lockout position 0 (LOC10). The PWM fan does not provide
purging in this lockout position
503.00
Note:
Step size of speed when making the setting with operating unit AZL2...: 10 rpm
Step size of speed when making the setting with PC software ACS410: 1 rpm
Purge speed:
Corresponds to the speed in revolutions per minute (rpm) used by the fan for pre- and/or
postpurging and/or valve proving.
503.01
Note:
Step size of speed when making the setting with operating unit AZL2...: 10 rpm
Step size of speed when making the setting with PC software ACS410: 1 rpm
Minimum limit speed ignition load P0:
Corresponds to the minimum speed for ignition load P0 in revolutions per minute (rpm) at which the
burner can still be securely ignited.
Prerequisite: P516.00 P0
516.00
Note:
Step size of speed when making the setting with operating unit AZL2...: 10 rpm
Step size of speed when making the setting with PC software ACS410: 1 rpm
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