GE Multilin G650 Manual page 270

5 SETTINGS
• COM1 (REMOTE) setting: defines whether the operation can be executed by communications through the rear port
COM1.
• COM2 (LOCAL) setting: defines whether the operation can be executed by communications through the rear port
COM2. We must note that this local port is the same as the front port (DB-9 connector). We can establish simultaneous
communication with the relay through ports COM1 and COM2. However, it is not possible to use rear COM2 and the
front port simultaneously.
• ETHER-MASTER setting: defines whether the operation can be executed by communications through the
ETHERNET.
It must be taken into account that besides the master selection in the operations screen inside relay configuration, there is
a hardware selection (with the operation pushbutton in the front part of the relay) to switch between local (COM2 and HMI)
and remote masters (COM1 and ETHERNET) for operations.The local-remote-off sequence can be also available through
communications selecting the signal to switch in "Setpoint>Relay Configuration>Protection Elements".
The following diagram shows an example of the operations internal logic.
Without interlock
logic
Condition 1
Interlocking
Condition n
Condition 1
Interlocking
Condition n
Condition 1
Interlocking
Condition n
Keyboard
Push button
Operation
Digital input
Condition 1
Success
Condition n
GEK-113285A
Figure 5–41: OPERATION LOGIC DIAGRAM
G650 Generator Protection & Control System
5.8 RELAY CONFIGURATION
Operations Logic
Time Out
Operation Bit
Reset
5
(state)
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