Motor Controllers AC Variable Frequency Drives
RVBS
Specifications are subjected to change without notice.10/08/2021
42
5.
Alarms
5.1
Alarm code
RVBS trigger an alarm in the situation that it senses the malfunction itself defined in below table. The table
shows supported alarm code values and corresponding explanation of those alarms. In addition, when an
alarm is issued, the red LED will switch ON and flash according to the table below. To check the type of
ModBus communication error, check the function code D11.
Function
code
Mod.
add.
Description
Def
Min
Max
U.M.
R/W
D02
0x0502
Alarm code
-
-
-
-
R
Value
Keypad
Indication
Description
LED flashes
1
OC1
Instantaneous over-current (during
acceleration)
5
2
OC2
Instantaneous over-current (during
deceleration)
3
OC3
Instantaneous over-current (during steady
state)
6
OU1
Over-voltage (during acceleration)
3
7
OU2
Over-voltage (during deceleration)
8
OU3
Over-voltage (during steady state)
10
LU
Under-voltage
17
OH1
Heatsink overheated
7
23
OL1
Motor overload
25
OLU
Inverter overload
31
Er1
Memory error
Fully ON
33
Er3
CPU error
Fully ON
37
Er7
Tuning error
2
38
Er8
RS-485 communications error
1
46
OPL
Output phase loss
9
51
ErF
Data saving error during under-voltage
1
254
Err
Mock alarm
4
The alarm code is presented in two ways as follows:
-
LED flashes
RVBS has two LED on its circuit board. One is green LED, and the other is red LED. The green LED
always flashes as long as the power of RVBS is supplied. The Red LED only flashes when alarm
presents. It stays off on the condition of normal operation.
-
Function code
The newest alarm of RVBS present in the Alarm code (D02). The most recent 4 alarms are
memorized in a FIFO type alarms queue (D12 to D15). Namely, the last alarm memorized is visible in
the Alarm 1 status variable (D12).
