Paradise Datacom 4 RU Chassis, Руководство по эксплуатации

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84 201627 REV X 4 RU SSPA Chassis Operations Manual
7.2.2.4 Data Tag
The data tag specifies the type of internal resource of information needed to be ac-
cessed on the amplifier. The data associated with certain tags is read only. Therefore,
only the “Get” command byte would be associated with these data tags. The data tag
byte values are given in
Table 7-2
.
7.2.2.5 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 than 1 byte, then all subsequent data fields must be
accessed starting from the specified address. For example, if the requester wants to
access the amplifier’s unique network address, it should set data tag 0 (Systems set-
tings tag) and data address 8 (see Systems Settings Details table). If the following
Data Length field is more than one (1), then all subsequent Settings will be accessed
after the Unique Network Address. When the Response Frame Data Address is omit-
ted, this byte position is replaced with the Error Status fields. The various error codes
are given in
Table 7-3
. Note that the Request and Response frames are different.
Tag Name
Byte
Value
Minimum
valid length
of Data Field
Description
System
Tag Settings
0 1 byte
This tag allows accessing various system settings
on remote unit. Host access status: Full Read/Write
access. Settings can be modified at any time. Some
settings may require hardware reset of the remote
SSPA unit.
System
Threshold Tag
1 2 bytes
This tag allows access to the critical unit thresholds.
Host access status: Read Only access. New thresh-
olds are in effect immediately after change.
System
Conditions Tag
3 1 byte
This tag allows access to the unit’s internal condi-
tions flags, such as fault status or current system
status. Host access status: Read only. This type of
data cannot be set or modified remotely.
ADC Channels
Access Tag
4 2 bytes
This tag allows access to the unit’s internal Analog
to Digital converter. Host access status: Read only.
This type of data cannot be set or modified re-
motely.
Reserved 2 N/A
This tag is reserved and not used for SSPA applica-
tions.
Table 7-2: Data Tag Byte Values