SWT 3000 Equipment Manual Functional Description
© SIEMENS AG 2008 Edition p3_3_2x 08/09 Page - 27
Mode3 (four commands with priority)
For this mode no coded tripping is available!
In Mode3 the command information is transmitted alternately if more than one of the command
inputs BI1...4 are active. The signal inputs also have different priorities (BI1=Prio1, BI2=Prio2,
BI3=Prio3, BI4=Prio4) i.e.: if several signal inputs are active the sequence in which the commands
are sent is determined by the priority control.
Table 16: Logic scheme for the Mode3 (Switching functions)
activated
Input
Transm.
uncoded
Command output in the remote station
tunbl>0
1)
all off fg ---
BI1 f1 CO1
BI2 f2 CO2
BI3 f3 CO3
BI4 f4 CO4
BI1 a/o BI2
a/o BI3 a/o
BI4
f1 a/o f2 a/o
f3 a/o f4
alternating
CO1 a/o CO2 a/o CO3 a/o CO4 alternating, see
2)
--- --- Alarm signaling +Unblocking pulse at EALR
Usynch fs ---
1) if an invalid frequency or code is received resp. in case of guard tone alarm: If tunbl>0 output of the unblocking pulse
(tunbl. = Duration of the unblocking pulse). The unblocking pulse is distributed via the EALR output of the PU3f.
2) If more than one input is active command transmission is alternating. The sequence in which the command frequencies
are transmitted is dictated by the CO3 priority control. Setting the output extension to >=100ms on the receive side prevents
the output relays releasing during alternating command transmission.
Mode 3a (four independent commands 4iC)
This mode is always transmitted in the coded tripping function!
Table 17: Logic scheme for the Mode3a (4iC four independent commands)
activated
Input
Transm.
coded
Command output in the remote station
tunbl>0
1)
all off fg ---
BI1 f
s
+f
4
CO1
BI2 f
1
+f
4
CO2
BI3 f
2
+f
4
CO3
BI4 f
3
+f
4
CO4
BI1 + BI2 f
s
+f
5
CO1 + CO2
BI1 + BI3 f
2
+f
5
CO1 + CO3
BI1 + BI4 f
s
+f
6
CO1 + CO4
BI2 + BI3 f
1
+f
5
CO2 + CO3
BI2 + BI4 f
3
+f
5
CO2 + CO4
BI3 + BI4 f
2
+f
6
CO3 + CO4
BI1 + BI2 + BI3 f
1
+f
6
CO1 + CO2 + CO3
BI1 + BI2 + BI4 f
3
+f
6
CO1 + CO2 + CO4
BI1 + BI3 + BI4 f
s
+f
7
CO1 + CO3 + CO4
BI2 + BI3 + BI4 f
1
+f
7
CO2 + CO3 + CO4
BI1 + BI2 + BI3 + BI4 f
2
+f
7
CO1 + CO2 + CO3 + CO4
Usynch f
3
+f
7
---
-- -- Alarm signaling +Unblocking pulse at EALR
2)
1) If output allocation 1:1 is adjusted
2) If an invalid frequency or code is received resp. in case of guard tone alarm: If tunbl>0 output of the unblocking pulse
(tunbl. = Duration of the unblocking pulse). The unblocking pulse is emitted via the EALR output of the PU3f.
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