GE M60 UR Series

5-94 M60 Motor Protection System GE Multilin
5.2 PRODUCT SETUP 5 SETTINGS
5
c) UNRETURNED MESSAGES CH1(2)
PATH: SETTINGS  PRODUCT SETUP  DIRECT I/O  UNRETURNED MESSAGES ALARM CH1(2)
The M60 checks integrity of the direct input and output communication ring by counting unreturned messages. In the ring
configuration, all messages originating at a given device should return within a pre-defined period of time. The unreturned
messages alarm function is available for monitoring the integrity of the communication ring by tracking the rate of unre-
turned messages. This function counts all the outgoing messages and a separate counter adds the messages have failed
to return. When the unreturned messages counter reaches the user-definable level specified by the
UNRET MSGS ALARM
CH1 THRESHOLD setting and within the user-defined message count UNRET MSGS ALARM CH1 COUNT, the DIR IO CH1 UNRET
ALM
FlexLogic operand is set.
When the total message counter reaches the user-defined maximum specified by the UNRET MSGS ALARM CH1 MESSAGE
COUNT setting, both the counters reset and the monitoring process is restarted.
The operand shall be configured to drive an output contact, user-programmable LED, or selected communication-based
output. Latching and acknowledging conditions, if required, should be programmed accordingly.
The unreturned messages alarm function is available on a per-channel basis and is active only in the ring configuration.
The total number of unreturned input and output messages is available as the ACTUAL VALUES  STATUS  DIRECT
INPUTS  UNRETURNED MSG COUNT CH1 actual value.
5.2.17 TELEPROTECTION
PATH: SETTINGS  PRODUCT SETUP  TELEPROTECTION
Digital teleprotection functionality is designed to transfer protection commands between two or three relays in a secure,
fast, dependable, and deterministic fashion. Possible applications are permissive or blocking pilot schemes and direct
transfer trip (DTT). Teleprotection can be applied over any analog or digital channels and any communications media, such
as direct fiber, copper wires, optical networks, or microwave radio links. A mixture of communication media is possible.
Once teleprotection is enabled and the teleprotection input/outputs are configured, data packets are transmitted continu-
ously every 1/4 cycle (3/8 cycle if using C37.94 modules) from peer-to-peer. Security of communication channel data is
achieved by using CRC-32 on the data packet.
 UNRETURNED
 MESSAGES ALARM CH1
UNRET MSGS ALARM CH1
FUNCTION: Disabled
Range: Enabled, Disabled
MESSAGE
UNRET MSGS ALARM CH1
MESSAGE COUNT: 600
Range: 100 to 10000 in steps of 1
MESSAGE
UNRET MSGS ALARM CH1
THRESHOLD: 10
Range: 1 to 1000 in steps of 1
MESSAGE
UNRET MSGS ALARM CH1
EVENTS: Disabled
Range: Enabled, Disabled
 TELEPROTECTION

TELEPROTECTION
FUNCTION: Disabled
Range: Disabled, Enabled
MESSAGE
NUMBER OF TERMINALS:
2
Range: 2, 3
MESSAGE
NUMBER OF COMM
CHANNELS: 1
Range: 1, 2
MESSAGE
LOCAL RELAY ID
NUMBER: 0
Range: 0 to 255 in steps of 1
MESSAGE
TERMINAL 1 RELAY ID
NUMBER: 0
Range: 0 to 255 in steps of 1
MESSAGE
TERMINAL 2 RELAY ID
NUMBER: 0
Range: 0 to 255 in steps of 1