Technical Product Specification

Intel® Server System SR2612UR TPS Cooling Subsystem
Revision 1.3
Intel order number E76293-003
25
3.10.2 Data Format
The data format for current, voltage, power, temperature, and fan speed are using the PMBus
Literal format.
Literal data format: X = Y · 2
N
X = the sensor value in volts, amps, watts, degrees C, or RPM
Y = mantissa. The mantissa is the variable components that changes as the sensor value
changes. Y is a 16-bit unsigned value for the READ_VOUT command. For all other READ
commands, Y is an
11-bit signed 2’s compliment value.
N = exponent. The exponents are fixed for each power supply and define the resolution for
each sensor.
3.10.3 Monitoring power/current/voltage
The following PMBus commands are supported for the purpose of monitoring currents, voltages,
and power.
PMBus command
Description
READ_IIN
RMS input current in amps
READ_VIN RMS input voltage in volts
READ PIN
AC input power in watts
3.10.4 Thermal Management
The following commands are supported for monitoring temperature, monitor fan speed, and
controlling the power supply fan. The fan monitoring is configured to provide a value in RPM.
The fan control is in RPM too. All temperature sensors and fans in the power supply are
accessible via PMBus.
Command Description
READ_FAN_SPEED_1 Returns the fan speed in RPM of fan sensor 1.
READ_FAN_SPEED_2
Returns the fan speed in RPM of fan sensor 2.
READ_TEMPERATURE_1, _2, _3
Returns the temperature in degrees C of temp
sensors 1, 2, and 3.
FAN_CONFIG_1_2
Returns the configuration of Fan 1 and Fan 2 in the
power supply.
FAN_COMMAND_1,_2 Allows the system to request fans in the power
supply to be set to the defined RPM. The system
cannot cause the power supply to run slower than
the power supply needs for cooling.