Huawei ADF10S48B Technical Manual page 19

ADF10S48B
AC-DC Converter Technical Manual V1.1
PMBus Communication
Figure 38: VOUT data format
The output voltage is calculated as follows:
Voltage = V x 2
Where:
Voltage is the output voltage value.
V is the 16-bit unsigned integer.
N is the 5-bit signed integer (two's complement).
Command Descriptions
OPERATION (01h): By default, the module is turned
ON as long as Enable is active-low.
The OPERATION command is used to turn the
module ON or OFF via the PMBus. It uses the
following data bytes.
Function Data Byte
ON 0x80
RESET 0x00
OFF 0x55
To reset the module after it is turned OFF, wait at
least 10 seconds, and then turn it ON. All alarms
and shutdowns are cleared during a restart.
CLEAR_FAULTS (03h): Clears the latch fault.
STORE_DEFAULT_ALL (11h): Saves calibrated
or modified data. If this command is not sent,
calibrated or modified data cannot be saved in
the event of a power failure.
VOUT_MODE (20h): Determines the data type
and parameters used by a PMBus command.
VOUT_COMMAND (21h): Changes the output
voltage of the module.
The default value is 48 V. Voltage range: 36–55 V
GLOBAL ENERGY EFFICIENCY SPECIALIST
N
STATUS_WORD (79h): Reports module fault
information. The module latches off after a fault
occurs.
Bit Fault Name
b6–b15 -
b5 VOUT_OV
b4 IOUT_OC
b3 -
b2 OVER_TEMP
ERATURE
b0, b1 -
MFR_STATUS_WORD (E9h): Reports the module
state.
Bit Fault Name
b1–b15 -
b0 REMOTE
ON/OFF
MFR_WRITE_SYSTIME (ECh): As the module
does not have a time chip, the system uses the
ECh command to deliver the system time to the
module. The module then runs based on the
delivered system time in unit of seconds. To
ensure time accuracy, it is recommended that the
system synchronize time to the module every 10
minutes. The MFR_WRITE_SYSTIME command
format is shown in Figure 39.
Figure 39: MFR_WRITE_SYSTIME command
format
S: Start condition; R: Read bit value of 1; W: Write bit
value of 0; A: Acknowledge bit, may be ACK or NACK;
P: Stop condition
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Fault Definition
-
1 - Overvoltage
0 - Normal
1 - Overcurrent
0 - Normal
-
1 - Overtemperature
0 - Normal
-
Fault Definition
-
1 - OFF
0 - ON