Allen-Bradley 2707-M232P3 User Manual page 71

RS-485 Communications
with an SLC or DH-485
Network
The DTAM Micro and SLC DH-485 port must be set as follows for
communications to occur. If you are using an SLC 5/03, 5/04, 5/05 RS-232
port, refer to the previous section.
SLC
DH-485 Network
SLC
Link Coupler
DTAM Micro
The DTAM Micro must have an application with a AB DH485 operating
system installed. The baud rate, parity, and data bits of the DTAM Micro and
DH-485 network (or SLC) must be set the same. We recommend you use
19200 baud, even parity, and 8 data bits to match the default settings of
an SLC controller.
If the DTAM Micro module is installed on a DH-485 network that has a large
number of nodes connected and there is heavy network traffic, the network
may produce NAK NOMEM commands. Three consecutive NAK NOMEM
commands will produce a 10H error on the DTAM Micro module. Pressing
the enter key or resetting the module is required to resume operation.
Chapter 7
Communication
Connections and Setup
DTAM Micro
RS-485 Version
RS-485
Cable (Catalog No. 2707-NC1)
DH-485 Network
Link Coupler
Cable (Catalog No. 2707-NC1)
DTAM Micro
RS-485 Version
RS-485
7–9