Rockwell Automation 1734-485ASC POINT I/O RS-232 and RS-485 ASCII Modules Installation Instructions - Manual (Page 12)

12 POINT I/O RS-232 and RS-485 ASCII Modules
Publication 1734-IN588B-EN-P - July 2003
Communicating with the ASCII Modules
The ASCII modules operate as the PointBus front-end to your serial
device. Data can be exchanged with the master through a polled,
cyclic, or change-of-state connection. Bit-Strobe Command Response
Messaging and the Unconnected Message Manager (UCMM) are not
supported
1 . The module produces and consumes data as follows:
1 If you are not familiar with these terms, see the DeviceNet Specification for definitions (online:
www.odva.org).
I/O Connection Type Consumes Produces
Polled 4-132 bytes 4-132 bytes
Cyclic 4-132 bytes 4-132 bytes
Change-of-State 4-132 bytes 4-132 bytes
ATTENTION
!
The ASCII modules are not compatible with the 1734-APB
PROFIBUS adapter.