Sequence Diagram - Siemens RVW26.000B27 Basic Documentation

Phase 0 1
lim1
STOP
Q3
Q2
Y10
Y20
Q1
Q4-Q5
Y3,Y5
Y4,Y6
Y8
Position
A
MaxLoad
IgnPos
MinLoad
Z
Legend
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Siemens Building Technologies
HVAC Products

6.3 Sequence diagram

2 3 4 5
lim5
Fig. 15 Sequence diagram
Signal must be present or output is
under voltage
Signal must not be present or output
is not under voltage
Signal can be present
Output controlled
Condition for transition to the next
phase
lim Duration of phase is limited.
If there is no change of phase when
the preset time is reached, lockout
will be initiated
lim1 = 30 s
lim5 = 150 s
lim8 = 30 s
Electronic Air / Fuel Ratio Control System
6 Sequence of functions
6 7 R
BETRIEB
t4
SERVICE
OPERATION
1) 2)
1) 2)
1) Signals at «Y10» or «Y20» only act on
output «X1»
2) RVW26...follows the signal at «U1» for
controlled operation
t4 Interval
8 9 0
lim8
STOP
R
R
Quit
Ready
78731d04/1002
CC1P7873.1en
G
AUX1,
M
AUX2
SA5
M
AUX1(1)
SA6
M
AUX1(2)
SA7
M
AUX2
15.10.2002