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Sequence diagram
Capacity range > 120 kW
HMI
0
22
display:
Home run
Standby
TNB
TLO
TNN
PH_
Phase
PH_TNB
PH_TLO
PH_TNN
STANDBY
Heat demand
Flame
Ignition
BV
LP (2)
LP (3)
LP (4)
NoG_Max
N_Vor
-N_Vor_Delta
+N_VL_Delta
N_VL
+N_ZL_Delta
N_ZL
-N_ZL_Delta
N_TL
-N_TL_Delta
NoG_Null
7494f03e/0201
Logic on
Logic off
On deviation
transition to home run
Description of sequence
diagrams
Siemens Building Technologies
HVAC Products
1
3
2
4
TW1
THL1
tv
TBRE
TW2
PH_
PH_
PH_TV
PH_TBRE
PH_TW1
PH_TW2
STARTVER
THL1_1
PH_
STANDBY
dependent on
parameter
setting
Deviation leads to lockout
On deviation transition to
specified or following
phase
Control
The burner control's program is subdivided into different phases. Each phase is
identified by a certain output and input configuration of the burner control.
For the precise sequence of signals, refer to the sequence diagrams.
Signal sequences not shown in the sequence diagrams are summarized under «Special
cases».
The times given in the sequence diagrams are distinguished as follows:
UPPERCASE LETTERS
Lowercase letters
With regard to the speed feedback signal, the following nominal levels are used:
N_Vor,
N_VL,
Prepurging
Nominal load
1)
Previously «Full load» (VL)
Basic Documentation LMU54... / LMU64...
3 Functions
10 Hz
11 Bw
5
6
20
12 Hz+Bw
tsa
Operation
tvz
tsa1
tsa2
t i
PH_
MODU-
PH_
PH_
PH_
PH_TVZ
PH_TI
LATION
TSA1_1
TSA2_1
THL2_1
PH_
PH_
PH_
PH_
Z
Z
THL2
THL2
THL2
THL2
Z
Z
Z
dependent on
dependent on
parameter
parameter
setting
setting
Permitted range
Prohibited range
-> Home run
Prohibited range
-> Lockout
(e.g. «THL1»)
(e.g. «tsa»)
N_ZL,
1)
Ignition load
2
4
7
tsa
tn
THL1 (TW1)
tsa1
tsa2
PH_
PH_
P H _
PH_TN_1
PH_TW1
THL1_2
TSA1_2
TSA2_2
PH_
PH_
Z
Z
THL2
THL2
P H _
TSA1_2
Z
Z
Z
dependent on
dependent on
parameter
parameter
setting
setting
Control signal
Ideal signal
Transition criterion
Z
R
constants stored in ROM
parameters stored in EEPROM
N_TL
Partial load
21
99
THL2
tn
PH_
PH_
PH_TN_2
THL2_2
STOER
Z
Z
Z
Z
dependent on
parameter
setting
Triggering forced prepurging
Repetition can be parameterized,
then lockout
19/171
CC1P7494en
07.11.2002
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