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Installation and operating instruction
Combustion manager W-FM 100 und W-FM 200
6 Operation
83054802 1/2018-07 La
140-228
6.14 VSD / Frequency converter
Only the W-FM 200 is equipped with a frequency converter module for variable
speed control.
6.14.1 Frequency converter release contact
Param & Display
VSD module
Configuration
ReleasecontctVSD
The W-FM 200 is equipped with a release contact at output X73:1/2 for the fre-
quency converter [ch. 3.4.11].
Parameter
ReleasecontctVSD
stipulates the switch condition for the idle posi-
tion (0 %) in phase 10 (home run). The release contact closes from a setpoint
speed greater than 0 %, regardless of the parameter setting.
Setting
Function
closed
The release contact closes at idle position (0 %) in
phase 10 (home run), recommended setting.
open
The release contact opens at idle position (0 %) in
phase 10 (home run), e. g. when using a DC brake.
6.14.2 Speed measurement
Param & Display
VSD module
Configuration
Speed
Num Puls perR
Parameter
Num Puls perR
stipulates the impulses per rotation at input X70
6.14.3 Speed standardisation
Param & Display
VSD module
Configuration
Speed
Standardisation
StandardisedSp
Speed standardisation (
Standardisation
)
Parameter
Standardisation
starts the automatic speed standardisation, to do
this set parameter to
activated
.
As a prerequisite for speed standardisation, the pre-purge position of the air influ-
encing actuators must be set to 90° [ch. 6.9.4].
During the standardisation, the air influencing actuators drive to the pre-purge posi-
tion and the W-FM issues a setpoint signal of 95 % (approx. 19.2 mA) to the fre-
quency converter. The maximum frequency set at the frequency converter is there-
fore only achieved to 95% e. g. 52.5 Hz x 0.95 ≈ 50 Hz). The standardised speed
is determined and saved in parameter
StandardisedSp
.
For the speed control, the standardised speed applies as 100 % value. If, during
operation at 100% standardised speed is not reached, a reserve of 5% is available.
The burner requires re-commissioning after each standardisation.
Standardised speed (
StandardisedSp
)
In parameter
StandardisedSp
the speed saved during standardisation can be
viewed and changed.
The burner requires re-commissioning after each change made to the standardised
speed.