Siemens LMV51 Series, Basic Documentation, Page: 258 / 299

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Siemens Building Technologies Basic Documentation LMV5... CC1P7550en
HVAC Products 18 Addendum 3: Variable speed drive (VSD) module 13.08.2004
18.1.4 Configuration of current interface
The VSD is controlled via a current interface which can be switched from 0...20 mA to
4...20 mA, or vice versa.
Parameter:
Analog Output (0...20 mA / 4...20 mA)
If the VSD requires an input signal of DC 0...10 V, a resistor of 500
Ω ±
1 % must be
connected parallel to its input.
18.1.5 Configuration of fuel meter
The module can be used with fuel meters having a Namur or Reed output or open col-
lector (pnp).
To be able to adapt the module to different types of meters, the number of pulses corre-
sponding to a volume unit must be parameterized in the system.
The setting requires 4 or 5 decimal points. If one of these values shall be changed, the fol-
lowing setting procedure is required on the following menu:
«Params & Display»
→
«VSD Module»
→
«Configuration»
→
«Fuel Meter»
→
«Pulse Value
Gas
» or
«Params & Display»
→
«VSD Module»
→
«Configuration»
→
«Fuel Meter»
→
«Pulse Value
Oil
»
The pointer indicates the unit to be selected (1 m
3
/ 1ft
3
)
P u l s e V a l u e G a s
C u r r : 3 . 0 0 0 0
1 m 3 = 3 . 0 0 0 0
The proposed unit can be changed with
SELECT
.
When pressing
Enter
, the pointer jumps to the first position of the display section with
the numbers.
P u l s e V a l u e G a s
C u r r : 3 . 0 0 0 0
1 m 3 = 3 . 0 0 0 0
SELECT
can be used to change the digit with the highest value of the numerical num-
ber, or
ENTER
can be pressed to switch to the next digit.
After selecting the last decimal place and pressing
Enter
, the value will be adopted.
After selecting the last decimal place and pressing
Enter
, the value will be adopted.
The setting procedure for «Pulse Value Oil» is the same as that for «Pulse Value Gas»,
the selectable units being 1 l or 1 gal.
Note
Pulse value gas
Pulse value oil