Paradise RA 5785 manual 2 Command Byte Values, Command Name, 3 Data Tag Byte Values, Minimum

varies by the amount of attached data bytes. It may contain 11+N bytes where N is the amount of requested data bytes from a particular table, specified in Data Length field.

The Set Request command allows the sender to actively change parameters for the re- ceiver’s internal configuration. The Set Request frame must contain a number of bytes in the Data Field as specified in Data length field. The frame size must be 11+N bytes, where N is the length of the attached data structure. The receiver will respond with a frame where the command field will be set to a Set Response designator. The frame length is equal to the Request frame. The byte value for each command is given in Table 8-2.

Table 8-2: Command Byte Values

Command Name	Command Byte Value
Set Request	0
Get Request	1
Set Response	2
Get Response	3

8.1.2.4 Data Tag

The SSPA internal structure is organized in several tables, all of which share similar function- ality and internal resources. To access the various tables, the data tag must be specified in the request frame. The data associated with certain tags is read only. Therefore only the “Get” command request would be allowed to access these data tags. The SSPA will return an error on attempts to issue a “Set” request to a read-only table tag. Various tables may contain values formatted either in 1 or 2 bytes format. See Table 8-3.

Table 8-3: Data Tag Byte Values

	Byte	Minimum
Tag Name		valid length	Description
	Value
		of Data Field
			This tag allows accessing various system settings on remote unit.
System	0	1 byte	Host access status: Full Read/Write access. Settings can be modi-
Tag Settings			fied at any time. Some settings may require hardware reset of the
			remote SSPA unit.
System	1	2 bytes	This tag allows access to the critical unit thresholds. Host access
Threshold Tag			status: Read Only.
System			This tag allows access to the unit’s internal conditions flags, such
	3	1 byte	as fault status or current system status. Host access status: Read
Conditions Tag
			only. This type of data cannot be set or modified remotely.
ADC Channels			This tag allows access to the unit’s internal Analog to Digital con-
	4	2 bytes	verter. Host access status: Read only. This type of data cannot be
Access Tag
			set or modified remotely.
Packet	6	1 byte	Tag is not used in CO SSPA protocol.
Wrapper
Reserved	2	N/A	This tag is reserved and not used for CO SSPA applications.
Reserved	5	N/A	This tag is reserved for factory usage only.

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