Rockwell Automation 1794-APBDPV1 FLEX I/O PROFIBUS Adapter User Manual - Manual (Page 92)

Publication 1794-UM064B-EN-P - May 2014
80 Configure the Adapter for Master/Slave Communication
Enter User Parameter Data Send parameter data is comprised of a string of octets (1…244) that contain 244
bytes of data:
• octets 1…7 contain data specific to the:
– PROFIBUS Standard
– defaults contained in the database (GSD) file
• octets 8…244 are user configurable and contain user parameter data. User
parameter data consists of these formats:
– auto configure
– condensed
– full
Figure Send Parameter Data Table Structure shows the structure of the send
parameter data table.
Send Parameter Data Table Structure
User Parameter Data
The first byte of the user parameter data is the flags byte. This byte selects the
appropriate format and also specifies adapter behavior. The flags byte is defined
in the following table:
If the send parameter data is received with no user parameter data, the flags byte
is set to zero which selects:
Group Ident.
Number
Minimum
Station
Delay
Watchdog
Control Station
Status
User Parameter Data
Watchdog
Control
You configure these values using your
software configuration tool.
These values are defined by the PROFIBUS
standard. the defaults are provided by
the GSD file.
Ident.
1161
Send Parameter Data Flags Byte
Bit Position Name Description
0…1 Format Selection 00 = Auto Configure
01 = Reserved
10 = Condensed
11 = Full
2…3 Fault Action 00 = Reset to zero
01 = Hold Last State
10 = Use Safe State
11 = Reserved
4 Input Fault Action 0 = Reset inputs to zero
1 = Hold Last Value
5 Byte Order of Float values
6…7 Reserved Reserved bits must be zero