ADLINK PXES-2590 - Manual (Page 54)

44 Monitoring/Control Functions
*Read Target Chassis Temperature (command 0x30)
Reads the Target Chassis Temperature.
Use the SMB 1 Send Byte and 2 Receive Byte to Read this
word data:
Data format is as follows:
*Read Fan Speed Mode (command 0x44)
Reads the Fan Speed Mode.
Use the SMB 1 Send Byte and 2 Receive Byte to Read this
word data:
SMB Dir Offset Value Description
Send Byte > 0 SA Slave address
> 1 0x30 Command code
Receive Byte > 2 SA Slave address
< 3 0-255 Low byte data
Receive Byte > 4 SA Slave address
< 5 0-255 High byte data
Bit Description
7..0 Maximum chassis temperature setting. Unsigned 8-bit data,
the LSB is 1°C. The CPU can set the temperature at which
maximum fan speed is achieved. The system monitoring MCU
adjusts the fan speed according to this setting. The threshold
range is between 25 and 70
15..8 Reserved.
SMB Dir Offset Value Description
Send Byte > 0 SA Slave address
> 1 0x44 Command code
Receive Byte > 2 SA Slave address
< 3 0-255 Low byte data
Receive Byte > 4 SA Slave address
< 5 0-255 High byte data