User Manual
Section 4
GFK-2958L
May 2021
Detailed Descriptions of the Fieldbus Network Adapters
125
4.5.6
Process data
The EPXEIP001 process data are being packed into these assemblies:
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 (101)
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.
Note:
Only the associated assemblies 101 with 102 or 103 with 104 can be used. If the EDS
file has been installed this will be checked and an invalid will be rejected.
The first connection established consist either of two assemblies 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 assembly 0xC7 (199) as output. Neither of these assemblies is
accessible via the class assembly. Only one PLC can write into the output data at a time, further
connection attempt
s will be rejected. Although further “Input only’’
or “Listen only’’
connections can be established.
First Connection
Second Connection
Result
Input+Output (Exclusive
owner)
Input+Output (Exclusive
owner)
Not possible, as only one
connection can write output data.
Input+Output (Exclusive
owner)
Input only
permitted
Input+Output (Exclusive
owner)
Listen only
permitted
Input only
Input+Output (Exclusive
owner)
permitted
Input only
Input only
permitted
Input only
Listen only
permitted
Listen only
Not possible, as Listen only cannot
be established as first connection.
