5.1 Operation Confirmation with PC Software
B5-3
ME0384-4A
(6)
If "300: Communication port open error"
screen is displayed, communication
connection has failed.
The following causes may be
possible, so review the procedure
from item
1.
[Causes of communication connection failure]
● Mismatched communication port (COM port)
● Disconnected communication cable
● Connection problem of communication cable connector
● Gateway unit side, PC side malfunction
● PC software double startup
may be possible causes.