Toshiba GR-200-5 Instruction Manual page 259

From PROT_COMM
CB_ALLPH_CLOSE
800000EBB4
ARC-EN
800000EBB0
810000EBB1
Shot counter logic
Shot counter logic
Shot counter logic
Shot counter logic
Shot counter logic
ARC-NUM
The timer [TREADY] shown in Figure 2.22-3 is the reclaim timer and is used to delay the
operation of the ARC, as discussed in Chapter 2.22.2(xiii).
If the 'ARC READY' signal is not generated while signals 'ARC_START' and 'SHOT_1ST'
are set to TRUE, (Logic level being high'1') in the Initiation logic, see Figure 2.22-2, the ARC
operation is locked out, (indicated by signal 'ARC FT' in Figure 2.22-2). The
'CB_ALLPH_CLOSE' signal is used so that the CB closed condition is determined. The PLC
connection point 'CB-ARC READY' is active when the CB provides the ready signal.
Initiation logic - settings
(ii)
Figure 2.22-4 shows the Initiation logic. The TRC function sends a 'GEN.TRIP' signal to the
ARC function to start the autoreclosing. If an external relay is able to provide a start signal, it
can be introduced to the ARC function using the PLC connection point 'EXT.ARC_START'. The
PLC connection point 'ARC NO ACT' is provided to inhibit ARC operation; the user can use it
to stop the ARC function when required by the use of an external relay.
CB-ARC READY
OFF
ON
ARC-OFF
ARC-ON
Signal '1' generated when
contradiction between ARC-OFF
and ARC-On does not exist.
SHOT_2ND
SHOT_3RD
SHOT_4TH
SHOT_5TH
SHOT_6TH
S1
S2
S3
S4
S5
Figure 2.22-3 Start-up logic
- 239 -
&
&
≥1
&
≥1
&
&
&
To Shot number coordination logic
& ≥1
&
&
&
6F2T0207 (0.01)
To Initiation logic
TREADY
8000001B63
t 0
ARC READY
0.0-600.0s
ARC=OFF
ARC=ON
ARC SHOT OVER
ARC SHOT OVER
To Shot counter logic
ARC-NUM=S1
ARC-NUM=S2
ARC-NUM=S3
ARC-NUM=S4
ARC-NUM=S5
GRE200 (5,6)