Toshiba GRL100-701B Instruction Manual page 43

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"Master" or Slave" in SP.SYN. If the master terminal becomes out-of-service, therefore, the
synchronization control of slave terminal follows that of the master terminal by ON/OFF at the
master terminal and the current differential protection is blocked.
When putting a terminal into out-of-service in three-terminal operation, the following setting
change method is recommended:
(Example)
When putting Terminal C into out-of-service to two-terminal operation, the following four
setting are changed.
SP.SYN:
If the terminal C has been "Master", change the terminal A or B to "Master". If the terminal A or
C has been "Master", do not change the setting.
TERM:
Change both the terminal A and B to "2TERM".
CH.CON:
It is defined that CH1 of both terminal relays is connected each other in two-terminal application
and CH1 of local relay is connected to CH2 of remote relay in three-terminal application as
shown in Figure 2.2.14.3. Therefore, the communication cable connection must be changed from
CH2 to CH1.
[CH.CON] is to change CH1 or CH2 signal with CH2 or CH1 signal in the relay inside. If the
[CH.CON] is set to "Exchange", CH2 data is dealt with as CH1 data or in reverse. In Figure
2.2.14.3, change the terminal B to "Exchange". However, note that the display or output such as
a communication failure, etc. is expressed as CH1 because CH2 data is dealt with as CH1 data at
the terminal B.
RYID1:
The remote terminal 1 seen from terminal B changes from terminal C to terminal A. Therefore,
change the remote terminal 1 relay address setting RYID1 from "2" to "0" at terminal B.
If the relay address monitoring switch [RYIDSV] is "OFF", the setting is invalid and setting
change is not required.
Remote differential trip RDIF
This function is not available for the A-MODE setting.
When this function is used, set [RDIF] and [TERM] are set to "ON" and "3-TERM" and the
following must be configured by the PLC function.
Assign the remote DIF trip send signals RDIF-∗-S to user configurable data, and the receiving
data from remote terminals to the trip command signals RDIF-∗-R1 and RDIF-∗-R2.
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