Matrix Orbital PK202-24-USB - Manual (Page 26)

Table 10: Continued / Size Byte
Bit Description
7 Continued
6
5
4
3 Packet Size
2
1
0
Table 11: Display Return Protocol Types
Decimal Hex ASCII Description
49 0x31 ’1’ 1-Wire data
82 0x52 ’R’ Fan RPM data
5.2 Fan and GPO Commands
5.2.1 General Purpose Output Off (254 86 [gpo #])
This command turns OFF any of the general purpose outputs. [gpo #] is 1 to 6.
5.2.2 General Purpose Output On (254 87 [gpo #])
This command turns ON any of the general purpose outputs. [gpo #] is 1 to 6.
5.2.3 PWM Value (254 192 [fan #] [PWM value])
This command sets one of the high power GPOs (GPOs 1-3) into PWM mode. This permits speed
control of a fan. A PWM value of 0 is off, 128 is 50% power, and 255 is full power. The fan # can be 1 to 3.
5.2.4 Return Fan RPM (254 193 [fan #])
This command will return a packet to the host with the fan RPM contained in it. The structure of the fan
is described in the Table below.
Matrix Orbital PK202-24-USB 22