Allen-Bradley MicroLogix 1400 Instruction Manual page 643

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Knowledgebase Quick Starts 641
Micrologix 1000 Channel Configuration
Important Note:Do not connect to ML1000 directly using a
1761-CBL-AM00 cable.
Important Note:After the ladder logic has been entered into the ML1400
and the ML1000 channel configuration has been changed, in order for this
example to function connect the controllers using a 1761-CBL-PM02 cable,
leave connected until the COMM 0 LED on the ML1400 starts to blink.
Verifying data has been sent:
To verify the data has been sent to node 4 disconnect the PM02 cable and
connect the PC running RSLogix 500/RSLogix Micro to the ML1000 (Node
4). Go to N7:0 and view the data, this should match the data in N7:0 of
node 1.
Another way to verify the data is being sent to node 4 is to replace the
Target Device Data Table Address with an output modules address. In
this example the output module is a ML1000, the address would be O:0.0
This will display, in binary on the output LEDS, what ever number that
was entered into N7:0 of the ML1400.
IMPORTANT NOTE: By addressing O:0.0 the outputs of the destination
processor will be energized upon successful transmission of data. Verify
that nothing is connected to the outputs to ensure safe operation of the
controller.
If a 16 Point MicroLogix 1000 is being used as the destination processor
(Node 1), and the number 63 is entered into the above example, all the
outputs will be energized or turn. If the number entered is greater then 63
then a fault may occur with an error stating that the extended I/O bit (S:0/
8) was not set. In this case clear the fault, go offline, set bit (S:0/8) and
re-download the ladder program.
The above example uses the DF1 Full Duplex protocol. This is a point to
point or One Device to One Device protocol, using this protocol no other
devices can be connected. To create a network of multiple processors or
devices use the DH485 protocol and 1761-NET-AIC devices.
Publication 1766-RM001A-EN-P - October 2008