Delta VP3000 Series - Page 461

Chapter 8 Troubleshooting｜VP3000
452
ID No.
Warning Name
Descriptions
84
Modbus TCP over
(ECo0)
The connection of Modbus TCP has exceeded the limit
Action and Reset
Action Condition
Hardware detection
Action Time
Immediately act
Warning Setting Parameter
N/A
Reset Method
Manual reset
Reset Condition
Immediately reset
Record
No
Cause
Corrective Actions
The number of master station
connection is larger than the
number of the communication card
that can be connected
Reduce the connected number of the master station.
Though there is no communication
after the upper unit is connected,
the Modbus TCP is still on-line,
which caused the connection
being occupied.
Modify the upper unit program. It must be disconnected when it is not used for a
long time.
Every time the upper unit connects
with the communication card, it
opens a new Modbus TCP
connection, which causes the
connection to be occupied
Modify the upper unit program. Uses the same Modbus TCP connection when
connecting to the same communication card.