Rockwell Automation 20-COMM-Q ControlNet Adapter - Manual (Page 245)

ControlNet Objects C-35
20-COMM-C/Q ControlNet Adapter User Manual
Publication 20COMM-UM003F-EN-P
Formulas for Converting
Display Value = ((Internal Value + Offset) x Multiplier x Base) / (Divisor x 10
Decimal Places
))
Internal Value = ((Display Value x Divisor x 10 Decimal Places ) / (Multiplier x Base)) - Offset
Common Services
Object Specific Services
The table below lists the parameters for the Get_Attributes_Scattered and
Set_Attributes_Scattered object-specific service.
27 Command Parameter This parameter commands the drive to take an action, such as ‘Reset Defaults’ or
‘Autotune’, and then returns to a value of zero. Offline software tools will not allow setting
this parameter to anything other than a value of zero. If an offline file contains a Command
Parameter with a non-zero value, the offline software tool will change the value to zero.
Note that command parameters cannot have values that do not return to zero.
28 Current Value Is Default This bit identifies a parameter that will not change if a ‘Reset Defaults’ is commanded. For
example, if a drive contains a Language parameter that is set to German, setting defaults
will leave the parameter set to German. Likewise, if the parameter is set to French, setting
defaults will leave the parameter set to French.
29 Use Zero Text If the ‘Disallow Zero’ bit is set, this bit must be cleared. If the ‘Disallow Zero’ bit is cleared,
then:
0 = Use Disabled Text parameter class attribute.
1 = Use Zero Text parameter instance attribute.
30-31 Reserved Reserved
Bit Name Description
Service Code Implemented for: Service Name
Class Instance
0x0E Yes Yes Get_Attribute_Single
0x10 Yes Yes Set_Attribute_Single
Service Code Implemented for: Service Name Allocation Size (in bytes)
Class Instance Par. Number Par. Value
0x4D Yes No Get_Attributes_Scattered 4 4
0x4E Yes No Set_Attributes_Scattered 4 4
Name Data Type Description
Parameter Number UDINT Parameter to read or write
Parameter Value UDINT Parameter value to read or write (zero when reading)