Siemens LMV27.100x2 Basic Documentation page 211

Building Technologies
Software version V01.90

Scaling of analog input changed (no burner OFF functionality)

Optimization: Variable step width between ignition and low-fire (40% difference in
speed, independent of ramp time; traveling time varies between 4 and 16 seconds
with a 5- to 20-second ramp)

Optimization: Checking the standardized speed between microcomputer 1 and
microcomputer 2 (wrong standardized speeds after restore)
Objective: Avoiding wrong standardized speeds after restore to new hardware
resulting from resonator tolerances of the 2 microcomputers

Optimization: Parameter access when firing on oil

Optimization: Assessment of Pmin in phase 62
Software version V2.00

Correction to fuel train Gp1: First safety time was up to 0.4 seconds too long

Correction to fuel train Gp1: Evaluation of pressure switches in phases 40 to 50
(Pmin / Pmax were not valued in phase 44, Pmin / Pmax were evaluated in phase
50 although the main valve was switched on)

First error reception for gas shortage with first setting (gas shortage error was
exceeded with first setting of OFF UPr – both errors occur in the same cycle)

Timeout (parameter 127) or communication breakdown with the AZL2 leads to
lockout during the time the curves are set (error code: 167, diagnostics: 8)
 with cold setting, no startup on completion of the password time

Communication breakdown with the ACS410 (30 seconds) leads to lockout during
the time the curves are set (error code: 167, diagnostics 9)
Software version V02.90

Optimization: Indication of errors on the parameter and info / service menu

Optimization: Rectification of eBus error telegrams, correction of manufacturer's
code for safety temperature limiter, extension of service data query PB:03h SB:10h
in order to read out / query the meter readings for the second fuel; the current fuel is
output in query PB:05h SB:09h

Optimization: Curve setting invalid (OFF UPr) upon change to cold settings

Optimization: Setting of minimum / maximum output via the parameterized
output

Optimization: Shorter startup time with valve proving (prepurge or postpurge time
simultaneously with valve proving)

New function: Loss-of-flame test (TÜV test), forced shutdown of fuel valves

Extension: Oil pressure switch-min active from phase 38 or safety time (phase 40)
Extension: Setting of dead band zone for load controller contacts, analog input and
BACS output

Extension: POC for firing on oil (alternative to pressure switch-max)

New function: Valve proving via pressure switch-min

New function: Abortion of postpurging (see postpurge time, extraneous light test in
phase 78)

New function: Evaluation of load controller contacts for multistage operation (normal
/ interchanged)

New fuel trains LoGp, Lo-2V, LoGp-2V

New operating modes (e.g. without actuator)

New function: Backup / restore via AZL2 (only with new software version AZL2)
Basic Documentation LMV27...
29 Revision history LMV27
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CC1P7541en
17.12.2018