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Manual – Fieldbus Interface INTERBUS UFI11A
Application examples
9.7 Reading of UFI11A or drive parameters via object 8288
The UFI offers a special parameter access via the object 8288 "variable data channel
with acyclical routing" for the universal read access to all data of the UFI or a drive in-
verter connected to the UFI (parameters, IPOS variables, IPOS program code, etc.).
The following description is the mechanism that can be used to read the IPOS variables
or other variables via the parameter channel of a drive inverter connected to the UFI
(with SBus address 1). This process requires a two-setp sequence:
• Writing the "variable data channel with acyclical routing“ with the order "Read IPOS
variable H0 to sub channel 1, sub address 1“
• Reading of the "variable data channel with acyclical routing“
The "variable data channel with acyclical routing“ is available via index 8288 dez (2060
hex).
Example
Reading the IPOS variable H0 = Index 11000 dez (2AF8 hex) of the drive inverter with
SBus address 1.
After receiving the positive "Write_Confirmation (+)," there will be a read access to the
"variable data channel with acyclical routing“ that will read in the data read with the read
order defined in the "Write_Request" into the interface module.
Word Meaning Coding (hex)
1 Command_Code = Write_Request 00 82
2 Parameter_Count 00 09
3 Invoke_ID Comm._Reference 00 02
4 Index = 8288 20 60
5 Subindex Length 00 0C
6 Data[1] = Subkanal Data[2] = Subadresse 01 01
7 Data[3] = Frametyp Data[4] = Datenlänge 86 08
8 Data[5] = Verwaltung Data[6] = Reserviert 31 00
9 Data[7] = Index High Data[8] = Index Low 2A F8
10 Data[9] Data[10] 00 00
11 Data[11] Data[12] 00 00
Bits 15 ... 8 7 ... 0
Word Meaning Coding (hex)
1 Command_Code = Read_Request 00 81
2 Parameter_Count 00 03
3 Invoke_ID Comm._Reference 00 02
4 Index = 8288 20 60
5 Subindex - 00 00
Bits 15 ... 8 7 ... 0
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