Publication 1756-UM514B-EN-P - February 2003
6-2 Messaging Between ControlLogix Controllers and PLC-5s or SLC-5/04s
Local DH+ Messaging:
ControlLogix Controller in a
Single Chassis to a PLC-5
This application sends a DH+ message from a ControlLogix controller
A through a 1756-DHRIO module to a PLC-5 processor B on a DH+
link. Local DH+ messaging may be used to send the message. In this
case, local DH+ messaging is used.
Figure 6.1 illustrates the steps you must use in this application:
Figure 6.1
Set the Module
Switches
page 6-3
Configure Msg
Instruction
s
page 6-3
1756-DHRIO
PLC-5/60 processor A
Node number: 015
DH+ link
Link ID 1
41283
Channel A
Node number: 010
ControlLogix controller
slot number: 0
12
IMPORTANT
When you are using local DH+ messaging between a
ControlLogix controller and a PLC processor, you do
not need a routing table. (The default setting on the
module out of the box is to have no routing table
set-up.)
However, if a routing table is programmed, verify it
is programmed correctly or a configuration fault may
occur.
Also, controller slot values for channels configured
for DH+ should be applied or restored to default
value, using the appropriate software tabs. Failure to
enter the correct value will generate a configuration
fault for that channel.
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