User Manual

ALF-DSP 88-U
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Byte 6 - 7: They indicate start and end channel numbers. Channel numbers start from 0.
Byte 8: This kind of parameter is the same with V1 version. Please refer to Appendix B.
Byte 9 - 40: Fill in parameter values of start to end channels. It shall be filled in from the ninth byte. Each parameter
value shall take two bytes.
2. Parameter Acquisition (0x22)
Data section format is the same with parameter controls. Parameter values may not be filled in. Acquired
parameters will be filled in this position.
3. Scenario Switch (0x13)
Byte 5: Fill in scenario numbers (0 - 15).
Byte 6 - 8: Fill in 0.
4. Other Controls (0x74)
Other controls include but not limited to GPIO, RS232, RS485, and central control replies. The protocol formats are
as follows:
GPIO:
Byte 5 Byte 6 Byte 7 Byte 8 Byte 9 Byte 10 Byte 11 Byte 12
Control
Type
Data
Length
Reserved Reserved GPIO Direction Start GPIO End GPIO Value
The controlling type for Byte 5 is 1.
The data length of Byte 6 is fixed as four bytes.
Byte 9 GPIO direction, set input or output. Value 0 indicates input, and value 1 indicates output.
Byte 10 - 11 start GPIO and end GPIO. DSP devices have eight GPIOs in total, which are indicated with number 0 - 7.
Byte 12 is determined according to Byte 9 GPIO direction. The field shall be filled in high (1) / low (0) level for output
settings. The field is a return field to read GPIO level value on devices for input settings.
RS232 / RS485:
Byte 5 Byte 6 Byte 7 Byte 8 Byte 9 - 132
Control Type Data Length Reserved Reserved Data
Byte 5 is 2 for RS232 control, and 3 for RS485 control.
The data length of Byte 6 refers to data length that shall be sent via RS232 / RS485 currently.
Byte 9 - 132 shall be filled in data sent by RS232 / RS485.
Central control replies:
Byte 5 Byte 6 Byte 7 Byte 8 Byte 9
Control Type Data Length Reserved Reserved Reply Switch
Byte 5 control type is 4.
The data length of Byte 6 is 1.
When Byte 9 is 1, it means turning on central control replies switch; and 0 means turning off replies.