Pmbus™ Command Map - Delta IMA-1000 Series Application Note

7.2 PMBus™ Command Map
The following sets of standard commands are supported
as per the standard PMBus™ protocol specification. While
reading data using any of the standard PMBus™ com-
mands, the power supply should always send the LSB first
followed by MSB with bit order of the bytes from 7 to 0. (big-
ending).
Command Command Name
Code
00h PAGE
01h OPERATION
02h ON_OFF_CONFIG
03h CLEAR_FAULTS
19h CAPABILITY
20h VOUT_MODE
3Ah FAN_CONFIG_1_2
3Bh FAN_COMMAND_1
3Ch FAN_COMMAND_2
40h VOUT_OV_FAULT_LIMIT √
46h IOUT_OC_FAULT_LIMIT
4Fh OT_FAULT_LIMIT
51h OT_WARN_LIMIT
78h STATUS_BYTE
79h STATUS_WORD
IMA-x1000-xx-Series_Application_Note_V4.0_XX_EN_2019-08-19
Page Transaction Type
0 1 Writing data Reading data
(12V) (5VSB)
√ √ Write Byte
√ Write Byte
√ N/A
√ √ Send Byte
√ N/A
√ √ N/A
√ Write Byte
√ Write Word
√ Write Word
N/A
√ √ N/A
√ N/A
√ N/A
√ √ N/A
√ √ N/A
Data Number
Format of data
bytes
Read Byte Unsigned 1
Integer
Read Byte N/A 1
Read Byte N/A 1
N/A N/A 0
Read Byte N/A 1
Read Byte N/A 1
Read Byte N/A 1
Read Word Unsigned 2
Integer
Read Word Unsigned 2
Integer
Read Word Linear 2
Read Word Linear 2
Read Word Linear 2
Read Word Linear 2
Read Byte N/A 1
Read Word N/A 2
PMBus™
Instruction
provide the ability to con-
figure, control and monitor
multiple phases on one
PMBus unit
turn unit on or off in con-
junction with the input
from the control pin
configure the combination
of CONTROL pin input
and serial bus commands
needed to turn the unit on
and off
clear any fault bits that
have been set
determine some key
capabilities of a PMBus
device
whether the device uses
the Linear, VID or Direct
modes for output voltage
related commands
configure up to two fans
associated with one
PMBus device
adjust the operation of up
to four fans contained in
the PMBus device or in
the host system
adjust the operation of up
to four fans contained in
the PMBus device or in
the host system
set the value of the output
voltage at the sense or
output pins that causes
an output voltage high
warning
set the value of the output
current, in amperes, that
causes the overcurrent
detector to indicate an
overcurrent fault condition
set the temperature, in
degrees Celsius, of the
unit at which it should
indicate an Overtempera-
ture Fault (Default:120°C)
set the temperature, in
degrees Celsius, of the
unit at which it should
indicate an Undertem-
perature Warning alarm
(115°C)
return one byte of infor-
mation with a summary of
the unit's fault condition
return two bytes of infor-
mation with a summary of
the unit's fault condition
21