Toshiba GR200 Series Instruction Manual page 1150

Detecting erroneous operation
10.3.1
Operation logics
(i)
The TCS has six sets of monitoring logic (TCS1 to TCS6), as shown in Figure 10.3-1. For
example, the TCS1 logic issues a signal "TC1_Fail" when the following conditions are
determined in the TCS1 logic:
Both signals at PLC connection points "TC1_FAIL_SIGNAL1" and "TC1_FAIL_SIGNAL2"

being absent for more than 0.4 sec.
Either On or OPT-On† being set for scheme switch [TCS1-EN].

800001EBB0 TC1_FAIL_SIGNAL1
800001EBB1 TC1_FAIL_SIGNAL2
800001EBB2 TC1_FAIL_COND
TCS1-EN
TCS2 scheme logic (same as TCS1 scheme logic)
TCS3 scheme logic (same as TCS1 scheme logic)
TCS4 scheme logic (same as TCS1 scheme logic)
TCS5 scheme logic (same as TCS1 scheme logic)
TCS6 scheme logic (same as TCS1 scheme logic)
†Note: If the user wishes to add a user-programmed condition for the TCS1 decision, set
OPT-On and connect the user-programmed signal at PLC connection point
"TC1_FAIL_COND". The TCS1 monitor will then only be available when a user-
programmed signal is present at PLC connection point "TC1_FAIL_COND".
Applications
(ii)
Example1
Figure 10.3-2 provides an application example of the TCS function. Two binary-input signals
are assigned to PLC connection points "TC1_FAIL_SIGNAL1" and "TC1_FAIL_SIGNAL2".
When the trip circuit is healthy, a small current will flow in the BI circuits, the CB auxiliary
contacts, and the trip coil. This small current can be observed to flow in both the CB-open
condition and the CB-closed condition. If the small current supplied to the trip circuit is lost,
8000011BB0
1
&
8000011BB1
1
8000011BB2
&
OPT-On
≥1
On
Figure 10.3-1 Six sets of TCS scheme logic
- 1129 -
t 0 0 t
0.4s 0.4s
6F2S1915 (0.46)
8000011B60
TC1_FAIL
8100021B60
TC2_FAIL
8200031B60
TC3_FAIL
8300041B60
TC4_FAIL
8400051B60
TC5_FAIL
8500061B60
TC6_FAIL
≥1
8F00001B60
TC_FAIL
GRZ200 (Soft 031 & 032)