Chapter 6
Communication Connections and Setup
6–9
The DTAM Plus and SLC 500 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.
RS-485
SLC 500
Cable (Catalog No. 2707-NC1)
Link Coupler
DH-485 Network
Link Coupler
SLC 500
DH-485 Network
RS-485
Cable (Catalog No. 2707-NC1)
DTAM Plus
RS-232 / RS-485 Versions
DTAM Plus
RS-232 / RS-485 Versions
Comm Port
Comm Port
DTAM Plus
The DTAM Plus must have an application with the AB DH485 operating
system installed. The baud rate, parity, and data bits of the DTAM Plus and
DH-485 network (or SLC 500) 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 500 controller.
If the DTAM Plus 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 Plus module. Pressing
the enter key or resetting the module is required to resume operation.
DH-485 Communications with
an SLC 500 or Network
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