Allen-Bradley ControlLogix 1756-DH485, User Manual, Page: 68 / 110

Publication 1756-UM532A-EN-P - May 2006
6-8 Communicate Between SLC Controllers over DH+ and DH485 Networks
SLC 5/03 Controller Sends a
Remote Message
In this example an SLC 5/03 controller initiates a remote message and sends it
to an SLC 5/04 controller.
Hardware Configuration
In this hardware configuration, an SLC 5/03 controller initiates a message to
an SLC 5/04 controller on a DH-485 network.
(1)
•
This SLC 5/03 controller connects to Channel A on the 1756-DH485
module.
(2)
•
The SLC 5/04 controller is connected to Channel B of the
1756-DHRIO module in the same rack as the 1756-DH485 module.
(3)
•
The SLC 5/04 controller receives a remote message from the SLC 5/03
controller through the 1756-DHRIO on the DH+ network.
(4)
Communication Between Two SLC Controllers Over DH-485 and DH+ Networks
DH+/RIO
DH485
ControlLogix Controller
1756-DHRIO
1756-DH485
Channel A
(2)
The SLC 5/03 controller
initiates the message.
(1)
DH485 network
communicating
through link couplers.
SLC 5/04 Controller
(4)
DH+ Network
Channel B
(3)
44064
AIC+
AIC