SWT 3000 Equipment Manual Functional Description
© SIEMENS AG 2008 Edition p3_3_2x 08/09 Page - 23
Mode 3b (2plus2)
The commands 1 and 2 are always uncoded transmitted. The commands 3 and 4 as well as com-
binations from commands 3 and 4 with 1 and 2 are always coded transmitted.
Table 9: Logic scheme for the Mode3b (2plus2)
activated
Input
Transm.
uncoded
Transm.
coded
Command output in the remote station
all off fg ---
BI1 f1 CO1
BI2 f2 CO2
BI1 + BI2 f3 CO1 + CO2
BI3 f
s
+f
4
CO3
BI4 f
s
+f
5
CO4
BI3 + BI4 f
s
+f
6
CO3 + CO4
BI1 + BI3 f
1
+f
4
CO1 + CO3
BI1 + BI4 f
1
+f
5
CO1 + CO4
BI1 + BI3 + BI4 f
1
+f
6
CO1 + CO3 + CO4
BI1 + BI2 + BI3 f
1
+f
7
CO1 + CO2 + CO3
BI2 + BI3 f
2
+f
4
CO2 + CO3
BI2 + BI4 f
2
+f
5
CO2 + CO4
BI2 + BI3 + BI4 f
2
+f
6
CO2 + CO3 + CO4
BI1 + BI2 + BI4 f
3
+f
4
CO1 + CO2 + CO4
BI1 + BI2 + BI3 + BI4 f
3
+f
5
CO1 + CO2 + CO3 + CO4
Usynch f
s
+f
7
---
Mode4 (only one commands active)
Table 10: Logic scheme for the Mode4
activated
Input
Transm.
uncoded
Transm.
coded
Command output in the remote station
all off fg fg ---
BI1 f1 f
s
+f
4
CO1
BI2 f2 f
1
+f
4
CO2
BI3 f3 f
2
+f
4
CO3
BI4 f4 f
3
+f
4
CO4
more than 1
input activated
fg
1)
fg ---
--- --- --- Alarm signaling
2)
USYNC fs f
s
+f
5
---
1) Input error. If more than one input is activated fg is transmitted.
2) If an invalid frequency or code is received, resp. in case of guard tone alarm
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