GE UR Series L90, Instruction Manual

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GE Multilin L90 Line Current Differential System 6-11
6 ACTUAL VALUES 6.2 STATUS
6
These values specify the remaining number of TCP connections still available for each protocol. Every time a connection is
used, the remaining number of connections decrements. When released, the remaining number of connections increments.
If no connection is made over the specific protocol, the number equals the maximum number available for the specific pro-
tocol.
For example, the maximum number of Modbus TCP connections is 4. Once an EnerVista session is opened on a computer
connected to the UR over Ethernet, the Modbus TCP status shows 3. If the EnerVista application is closed, the Modbus
TCP status shows 4.
Note that the maximum number of PMU TCP connections matches the number of aggregators.
6.2.18 PARALLEL REDUNDANCY PROTOCOL (PRP)
The Parallel Redundancy Protocol (PRP) defines a redundancy protocol for high availability in substation automation net-
works.
PATH: ACTUAL VALUES

STATUS

PRP
TOTAL RECEIVED PORT A
is a counter for total messages received (either from DANPs or from SANs) on Port A.
TOTAL RECEIVED PORT B
is a counter for total messages received (either from DANPs or from SANs) on Port B.
TOTAL ERRORS
is a counter for total messages received with an error (bad port code, frame length too short).
MISMATCHES PORT A
is a counter for total messages received with an error on Port A (PRP frame, but port received through
and LAN ID in the frame do not match).
MISMATCHES PORT B
is a counter for total messages received with an error on Port B (PRP frame, but port received through
and LAN ID in the frame do not match).

PRP

Total Rx Port A:
Range: 0 to 4G, blank if PRP disabled
MESSAGE
Total Rx Port B:
Range: 0 to 4G, blank if PRP disabled
MESSAGE
Total Errors:
Range: 0 to 4G, blank if PRP disabled
MESSAGE
Mismatches Port A:
Range: 0 to 4G, blank if PRP disabled
MESSAGE
Mismatches Port B:
Range: 0 to 4G, blank if PRP disabled