Toshiba GR200 Series Instruction Manual page 313

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Scheme logic and setting

Figure 2.18-5 shows the scheme logic of the OSTZ function. When the condition of out-of-step

is yielded, the OSTZ function can detect the motion of the loci impedance from Zone A, Zone B

. Then the OSTZ function will issue a trip command when the locus enters to Zone

C and when the locus keeps staying in Zone C for setting times [TOSTZ1] and [TOSTZ2].

The user should set scheme switch [OSTZ-EN] On in order to operate the OSTZ function.

The user should set scheme switch [OSTZ-Output] Trip to issue a trip command for the trip

circuit (TRC

). When the user requires outputting the trip command for the binary output

) instead of the TRC, the user should set BO the scheme switch [OSTZ-Output].

PLC connection point "OSTZ-BLOCK" is used to blocking the OSTZ function by an

external signal. The PLC function

Note: The OSTZ function also issues a trip command when the motion of the locus from

Zone C to Zone B, Zone A.

Note: Trip circuit is discussed separately. See Chapter

Note: Binary output circuit is furnished on Binary IO module. See Chapter

description: Binary IO module: Binary output circuit

Note: For more information, see Chapter

makes possible the connection with the logic.

Relay application: Trip circuit

PLC function

6F2S1915 (0.46)

GRZ200 (Soft 031 & 032)