Mode3 (Four Commands With Priority); Mode 3A (Four Independent Commands 4Ic) - Siemens SWT-3000 Equipment Manual

Functional Description

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 7:
activated
Input
all off
BI1
BI2
BI3
BI4
BI1 a/o BI2
a/o BI3 a/o
BI4
---
Usynch
1) if an invalid frequency or code is received resp. in case of guard tone alarm
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 8:
activated
Input
all off
BI1
BI2
BI3
BI4
BI1 + BI2
BI1 + BI3
BI1 + BI4
BI2 + BI3
BI2 + BI4
BI3 + BI4
BI1 + BI2 + BI3
BI1 + BI2 + BI4
BI1 + BI3 + BI4
BI2 + BI3 + BI4
BI1 + BI2 + BI3 + BI4
Usynch
1) If output allocation 1:1 is adjusted
Page - 22
Logic scheme for the Mode3 (Switching functions)
Transm.
uncoded
fg
f1
f2
f3
f4
f1 a/o f2 a/o
f3 a/o f4
alternating
---
fs
Logic scheme for the Mode3a (4iC four independent commands)
Transm.
coded
f
f
f
f
f
f
f
f
f
f
f
f
f
f
f
f
Edition p3_3_2x 08/09
Command output in the remote station
CO1 a/o CO2 a/o CO3 a/o CO4 alternating, see
Alarm signaling 1)
Command output in the remote station
fg
+f
s 4
+f
1 4
+f
2 4
+f
3 4
+f
s 5
+f
2 5
+f
s 6
+f
1 5
+f
3 5
+f
2 6
+f
1 6
+f
3 6
+f
s 7
+f
1 7
+f CO1 + CO2 + CO3 + CO4
2 7
+f
3 7
SWT 3000 Equipment Manual
---
CO1
CO2
CO3
CO4
---
---
CO1
CO2
CO3
CO4
CO1 + CO2
CO1 + CO3
CO1 + CO4
CO2 + CO3
CO2 + CO4
CO3 + CO4
CO1 + CO2 + CO3
CO1 + CO2 + CO4
CO1 + CO3 + CO4
CO2 + CO3 + CO4
---
© SIEMENS AG 2008
2)
1)