Kramer Electronics SP-14 - Manual (Page 17)

3.2.4 Get
The get function is used to obtain a number of attribute of the specified parameter.
The parameter request packet takes the following format:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
‘A’ ‘P’ ‘B’ paramID attribute value ‘A’
Where
‘A’, ‘P’ , ‘B’ are literal ASCII characters.
paramID is the parameter identifier. (see 3.2.1.2 Parameter Identifier)
attribute is the attribute identifier. (see 3.2.1.3 Attribute)
value is a value.
The possible attributes that can be obtained are: parameter availability, value availability, minimum
value, maximum value, parameter value (live) and parameter value (non-volatile/save).
3.2.4.1 Parameter Availability
The parameter availability function is a used to determine if this parameter is currently available to be
read or changed.
Attribute should be set to avParamAttr_avail from the table in 3.2.1.3 Attribute. Value is not used and
should be set to zero.
A successful call will return true (1) or false (0). See “3.2.2.2 Success Reply Packet with return value”.
True (1) indicates the parameter may be read or changed using any of the implemented functions.
3.2.4.2 Parameter Value Availability
The parameter value availability function is a used to determine if the specified value is currently a
valid value for this particular parameter.
Attribute should be set to avParamAttr_availValue from the table in 3.2.1.3 Attribute. Value specifies
the value to be queried.
A successful call will return true (1) or false (0). See “ 3.2.2.2 Success Reply Packet with return value”.
True (1) indicates the parameter value may be set using the set function if implemented.
3.2.4.3 Minimum and Maximum
The parameter minimum and maximum function is a used to obtain the minimum or maximum value
of the parameters’ range of values.
Attribute should be set to avParamAttr_min or avParamAttr_max from the table in 3.2.1.3 Attribute.
Value is not used and should be set to zero.
A successful call will return the relevant value. See “3.2.2.2 Success Reply Packet with return value”.
3.2.4.4 Parameter Value
The parameter value may be obtained using the attributes avParamAttr_value or
avParamAttr_e2value. The two value attributes represent the live setting value and the value stored in
persistent memory respectively.
It is recommended to use the avParamAttr_e2value attribute exclusively to obtain the current value.
Value is not used and should be set to zero.
The returned value is the value of the parameter setting. See “ 3.2.2.2 Success Reply Packet with
return value”.
3.2.5 Set
The set function is used to change the setting of the specified parameter.