Instructions

Basic Operation 18
Doc: HMSI-27-314, Rev. 3.10Anybus Communicator EtherNet/IP / Modbus-TCP User Manual
2.2 Data Exchange Model
Internally, data exchanged on the sub-network and on
the higher level network all resides in the same memo-
ry.
This means that in order to exchange data with the sub-
network, the higher level network simply reads and
writes data to the memory locations specified using the
Anybus Configuration Manager. The very same mem-
ory locations can then be exchanged on the sub-net-
work.
The internal memory buffer is divided into three areas,
based on function:
• Input Data (512 bytes)
This area can be read by the higher level net-
work, the web server and the E-mail client.
(Data representation on the higher level net-
work is described later in this chapter).
• Output Data (512 bytes)
This area can be read/written to by the higher
level network, the web server and the E-mail cli-
ent.
(Data representation on the higher level net-
work is described later in this chapter).
• General Data (up to 1024 bytes)
This area cannot be accessed from the higher level network, but can be used for transfers
between individual nodes on the sub-network, or as a general “scratch pad” for data. The actual
size of this area depends on the amount of data that is exchanged on the sub-network. The gate-
way can handle up to 1024 bytes of general data.
2.2.1 Memory Map
When building the sub-network configuration using the Anybus Configuration Manager, the different
areas described above are mapped to the memory locations (addresses) specified below.
General Data
ABC Internal Memory
Input Data
(512 bytes)
Subnetwork
Output Data
(512 bytes)
Higher Level Network
Input Data Output Data General Data
Subnetwork:
Fieldbus:
E-mail Client:
SSI:
Subnetwork:
Fieldbus:
E-mail Client:
SSI:
Subnetwork:
Fieldbus:
E-mail Client:
SSI:
Read/Write
Read Only
Read Only
Read Only
Read Only
Read/Write
Read Only
Read/Write
Read/Write
-
-
-
0x000 0x200
0x1FF 0x3FF
0x400
0x???