Paradise 205486 REV F Error Status / Data Address, 3:Error Status Byte Values, Error Code Name

10.2.5 Error Status / Data Address

This byte is a tag extension byte and specifies the first data element of the tagged data. If the Data Length is more then 1 byte, then all subsequent data fields must be accessed starting from the specified address. For example if the requestor wants to access the amplifier’s unique network address, it should set data tag 0 (System settings tag) and data address 8 (see System Settings Details table). If the following Data Length field is more than 1, then all subsequent Settings will be accessed after the Unique Network Address. When the Response Frame Data Address is omitted, this byte position is replaced with the Error Status fields. The various error codes are given in Table 10-3. Note that the Request and Response frames are different.

Table 10-3: Error Status Byte Values

Error Code Name	Byte Value	Possible Cause
No Errors	0	Normal Condition, no errors detected
Data Frame Too Big	1	Specified Data length is too big for amplifier buffer to ac-
		cept
No Such Data	2	Specified Data Address is out of bounds for this tag data
Bad Value	3	Specified value not suitable for this particular data type
Read Only	4	Originator tried to set a value which has read only status
Bad Checksum	5	Trailer checksum not matched to calculated checksum
Unrecognizable Error	6	Error presented in incoming framed, but SSPA failed to
		recognize it. All data aborted

10.2.6 Data Length

This byte contains different information for Request and Response frames. In a Request frame, it specifies the number of data bytes that are to be accessed starting from the first byte of the value specified in the Data Address byte. That byte must not exceed the maximum data bytes for a particular tag. The maximum data length for the Settings tag is 26 bytes. The maximum data length for the System Threshold tag is 6 bytes.

10.2.7 Data Field

The actual data contained in the packet must be placed in this field. The “Get Request” type of command must not contain any Data Field. Any “Get Request” will be rejected if any data is present in the Data Field. Generally, the Bad Checksum error code will be added to the response from the amplifier if the word size of the information is 16-bits or 2-bytes. Each data word is placed in the frame with its least significant byte first. All data with length of 2 bytes must be represented as integer type with maximum value range from 32767 to (-32767).

90 205486 REV F Operations Manual, HPA2, Compact Outdoor SSPA