Toshiba GR200 Series Instruction Manual page 219

healthy state, the echo signal is restricted to last for 200 ms by delayed pickup timer T2.
Figure 2.12-7 and Figure 2.12-8 shows ECHO logic. Users can enable ECHO operation
using scheme switch [Dis-ECHO] by setting it to Off.
From PROT_COMMON
CB_ANYPH_CLOSE
CB_ALLPH_OPEN
Figure 2.12-7 ZCS and ZCG for ECHO/WKIT operation
Permission signals received:
From Terminal 1
Integral DISCAR-R1-A =1
Integral DISCAR-R1-B
=1
Integral DISCAR-R1-C
=1
Integral DISCAR-R1-S
=1
External DISCAR-R1
=1
From Terminal 2
Integral DISCAR-R2-A
=1
Integral DISCAR-R2-B
=1
Integral DISCAR-R2-C
=1
Integral DISCAR-R2-S
=1
External DISCAR-R2
=1
DISCAR=POP+UOP
ECHO1_CONDITION
Dis-ECHO
On
&
1
810000EBBE DIS-ECHO BLOCK
ECHO2_CONDITION
WIKT function
(ii)
Figure 2.12-9 shows WIKT logic. WIKT can issue a trip signal on condition that a trip
permission signal has been received when POP operates. On the other hand, when UOP
operates, WIKT can issue a trip signal when a trip block signal has been stopped.
To operate WIKT, the following conditions are required:
From ZS and ZG
ZCGF-AX
≥1
ZCGF-BX
ZCGF-CX
ZCGR-AX
ZCGR-BX
ZCGR-CX
ZCSF-ABX
ZCSF-BCX
ZCSF-CAX
ZCSR-ABX
ZCSR-BCX
ZCSR-CAX
TCARECCB
t
0.00 to 200.00s
&
&
&
≥1
&
&
&
&
≥1
&
&
&
&
&
&
&
&
&
&
&
Figure 2.12-8 ECHO logic
- 196 -
T1
0 t
ECHO1_CONDITION
1
&
0.25s
0
ECHO2_CONDITION
t 0
0 t
≥1
0.2s
0.05s
≥1
≥1
t 0
0 t
≥1
0.2s
0.05s
t 0
0 t
0.2s
0.05s
t 0
0 t
0.2s
0.05s
t 0
0 t
≥1
0.2s
0.05s
≥1
≥1
t 0
0 t
≥1
0.2s
0.05s
t 0
0 t
0.2s
0.05s
t 0
0 t
0.2s
0.05s
6F2S1914 (0.49)
8000001B6B
&
ECHO_CS-A
≥1
1
8100001B6C
&
ECHO_CS-B
≥1
1
8200001B6D
&
ECHO_CS-C
≥1
1
8300001B6E
&
≥1 ECHO_CS
1
&
1
&
1
&
1
&
1
GRL200 (Soft 033 & 037)