3
Fig 2-2 Communication card appearance and structure component
2.3 LED display
LED status
POW
DP
COMM
ERR
ON
Power on
DP enters into
data interaction
state.
Communication
succeeds.
Slave address sets wrongly
or drive trips into fault
status.
1Hz FLASH
-
-
-
The function code
parameter address of card
access inverter is illegal.
2Hz FLASH
-
-
Communication card
is searching inverter.
The function code
parameter data of card
access inverter is illegal.
OFF
Power
failure
DP does not
enter into data
interaction state.
-
The access is correct.
2.4 Terminating resistor
Terminating resistors must be fitted to the first and last devices in the system. A "device" may
be a drive or PC/PLC.
• If the device is at the front of the network it must have terminating resistors.
• If the device is at the end of the network it must have terminating resistors.
• All other devices in the system should not have terminators.
As shown in Fig 2-2, terminating resistors switch is used to select whether to connect terminating
DB15
POW
DP
ADDH
ADDL
ERR
COMM
DB9 of DP port
Terminating resistors switch
Mounting bracket