User manual

5 Detailed descriptions of the eldbus coupler | EtherNet/IP eldbus coupler UR20-FBC-EIP
77Manual u-remote1432790000/08/12.2015
Process data
The UR20-FBC-EIP process data are being packed into these
assemblies:
Packed process data UR20-FBC-EIP
Input data
Assembly 0x65 (101) Assembly 0x67 (103)
2 byte status word 2 byte status word
X byte process data of the modules X byte process data of the modules
8 byte diagnostic data
Output data
Assembly 0x66 (102) Assembly 0x68 (104)
2 byte control word 2 byte control word
X byte process data of the modules X byte process data of the modules
8 byte diagnostic data control word
Assemblies 0x66 (102) and 0x68 (104) have a run/idle
header.
Only the associated assemblies 101 with 102
or 103 with 104 can be used. If the EDS le
has been installed this will be checked and an
invalid access will be rejected.
The rst connection established consist either of two assem-
blies with one for input and one for output data each, or it is
an „input only“ connection used as output assembly 0xC6
(198). In addition to an existing output data connection a
„listen only“ connection can be established, which uses as-
sembly 0xC7 (199) as output. Neither of these assemblies is
accessible via the class assembly.
Only one PLC can write into the ouput data at a time, further
connection attemps will be rejected. Although further „Input
only“ or „Listen only“ connections can be established.
Connection options UR20-FBC-EIP
First Connection Second Connection Result
Input+Output Input+Output Not possible, as only one con-
nection can write output data.
Input+Output Input only permitted
Input+Output Listen only permitted
Input only Input+Output permitted
Input only Input only permitted
Input only Listen only permitted
Listen only -- Not possible, as Listen only
cannot be established as rst
connection.
Packed process data of the modules
The process data of a digital module are packed directly on
the process data of the previous module. The process data
of all other modules always starts with the beginning of the
next word.
4AI4DI
Byte 2
2 Byte Status
Byte 3
Byte 4 ... 11
8DI
Packed process data in an exemplified module arrangement 4DI, 8DI, 4AI
The modules‘ process data include a maximum of 494byte.
Thererfore the process data of assembly 0x65 (101) and
0x66 (102) will include a maximum of 496 byte, whereas
the process data of assembly 0x67 (103) and 0x68 (104)
include a maximum of 504 byte. The actual length is dened
by the arrangement of the modules, the assemblies‘ size is
always an even number of bytes (2byte, 4byte etc.). So in
the example assembly 0x65 (101) is 12 byte long whereas
assembly 0x67 (103) is 20 byte long.
The size which is expected during the con-
nection is being established can be read from
class 0x04 (4), instances 0x65 to 0x68 (101
to 104), attribute 0x04 (4) or via the web
server.