Design Guide
Revision 1.12
1998-08-12
HMS F
IELDBUS
S
YSTEMS
AB
Page 7 (35)
2 Description of the ANYBUS DATATRANSFER Module
The ANYBUS modules are designed to fit into applications with different complexity levels. There are three
different types of ANYBUS modules depending on the amount of data that has to be handled. There will be
an ANYBUS for all major fieldbus system and the customer does not have to consider any fieldbus specific
information, fieldbus dependent settings or installations for the design of an application product.
•
ANYBUS-32 I/O. 16 digital inputs and 16 digital outputs
•
ANYBUS-64 I/O. 32 digital inputs and 32 digital outputs
•
ANYBUS-DATATRANSFER. 0-480 input bytes and 0-480 output bytes
The ANYBUS-DATATRANSFER can handle large amount of data and parameters that are transferred over
a fieldbus network.
The amount of data that can be sent and received by the ANYBUS module depends on the fieldbus
network that is used.
From the user's point of view all different types of ANYBUS are interfaced in the same way. The user does
not have to consider any bus specific information or fieldbus technical settings and installations.
2.1 Interface to the Application
There are two ways to access fieldbus data in the DATATRANSFER module:
•
Parallel. Through a dual ported RAM memory (DPRAM).
•
Serial. Through a asynchronous interface
DPRAM
1KB
SCI
Rx
Tx
RTS
Address & Data bus
A
NY
B
US
electronics
Application side
A
NY
B
US
side
Alternative 1
Alternative 2
Figure 1. Application interface
Note!
Since different hardware is required for the different interfaces, only one of the above mentioned access
methods can be used in one module. Also note that there is one ANYBUS DATATRANSFER module for
each fieldbus system. The synchronous interface is only available for development of customer specific
products.
