Time Table And Settings For Program Sequence Pme71.901 - Siemens LME7 Series Basic Documentation

12.3 Time table and settings for program sequence PME71.901...

Type
TSA
PME71.901... tw
max.
Requirement 2.5 3
Factory setting --- t3n+0.45
Max. 2.5 14
Min. --- ---
Step size --- ---
Function parameter
Air pressure switch input
0 = inactive
1 = active
Repetition in the event of loss of flame at the end of safety time
<2: None
= 2: 1 x
= 3: 2 x
= 4: 3 x
Repetition in the event of loss of flame during operation
<2: None
= 2: 1 x
Valve proving
0: inactive
1: active
Valve proving
0: During prepurge time
1: During postpurge time
Valve proving
0: According to P241.01
1: During prepurge time and postpurge time
Legend
tw Waiting time
TSA Safety time
t1 Prepurge time
t3 Preignition time
t3n Postignition time (P257 +0.3 seconds)
t4 Interval: End safety time - load controller release
t8 Postpurge time
1) Response time to a change of signal by the air pressure switch (opens) and response time in the event of loss of flame
2) Response time to a change of signal by the inputs (e.g. pressure switch-min)
3) Flame detection time
4) Minimum time td1 + td2 + td3 + td4 if: Parameter P241.00 = 1 (ON, after mains ON, with lockout, P234 (postpurge time) = 0 (postpurging) or P241.01 = 0
5) Minimum time td1 + td2 + td3 + td4 if: Parameter P241.00 = 1 (ON) and P234 (postpurge time) >0 (postpurging) and P241.01 = 1
Building Technologies Division
Infrastructure & Cities Sector
t1
t3 t3n
P225
P226 P257 P230
4)
min. ca. min.
min.
20 3 2.5
19.404+2.1 3.087 2.205+0.3 15.582
1237+2.1 37.485 13.23+0.3 74.97
0+2.1 1.029 0+0.3 3.234
4.851 0.147 0.147 0.294
Parameter number
Basic Documentation LME7...
12 PME71.901...
Times in seconds
t8
t4 t10
P234 t11
P224
5) ca.
ca.
min.
15 4 15 60
4.851 13.818 58.212
1237 13.818 ---
0 0 ---
4.851 0.294 ---
Factory setting
P235 0
P240.00 0
P240.01 0
P241.00 0
P241.01 1
P241.02 0
t10 Specified time air pressure switch state message (timeout)
t11 Opening time of actuator (timeout)
t12 Closing time of actuator (timeout)
td1 Test atmospheric pressure
td2 Test gas pressure
td3 Test space filling
td4 Test space evacuating
td1
t12
1) 2) 3) td2
ca.
min.
60 --- --- --- 10
58.212 --- --- --- 10.29
--- 1 0.45 0.45 37.485
--- 0.3 0.3 --- 1.029
--- --- --- --- 0.147
td3
td4
max.
3
2.646
2.646
0
0.147
68/245
CC1P7105en
29.11.2011