Problem Communicating with 1769-OB32 over devicenet

m-costa

Member
M
Join Date
May 2009
Location
Kenucky
Posts
2
I have a Micrologix 1500 configured with a 1769-SDN communicating with 1769-OB32 24VDC output module using a 1769-ADN.

The Micrologix reads the adjoining module a 1769-IQ32 to memory address I:1.66 this one reads fine to the 1500.

The RSNetWorx shows that the 1769-OB32 is mapped to O:1.2 and O:1.3. When I activate any of the bits in ladder logic, the outputs do not switch.

Looking at RSNetWorx the 1769-ADN is not seeing any of the mapped outputs being sent.

Any ideas?
 
Let's visit the fundamentals:

Are there any errors indicated by the 1769-SDN display ?

Do you have the "Run" bit in the 1769-SDN Command Word (O:1.0/0) set true, with the MicroLogix 1500 in RUN mode ?

Inputs will read fine in controller Program mode or scanner Idle mode, but outputs will not be sent.
 
Ken Roach said:
Let's visit the fundamentals:

Are there any errors indicated by the 1769-SDN display ?

Do you have the "Run" bit in the 1769-SDN Command Word (O:1.0/0) set true, with the MicroLogix 1500 in RUN mode ?

Inputs will read fine in controller Program mode or scanner Idle mode, but outputs will not be sent.
Click to expand...



Hi.
I have de same problem, I have a remote backplane with 4 slots 2x iq32 and 2 oq32, the equipament works well, and quickly stop work and I have 2 iq32 without communication and 2 oq32 works. I can’t understand the command run for s
Slots. Can you explain please?
 
kindbu said:
Hi.
I have de same problem, I have a remote backplane with 4 slots 2x iq32 and 2 oq32, the equipament works well, and quickly stop work and I have 2 iq32 without communication and 2 oq32 works. I can’t understand the command run for s
Slots. Can you explain please?
Click to expand...

What is the PLC connecting to the remote rack?
 
That's an Ethernet adapter, not a DeviceNet adapter. And you revived this thread that had been resolved for almost 15 years.

Please go to the main PLCTalk Q&A page and click the green "Start a new thread" button. Post as much information about your system as you can.
 
JeremyM said:
What does the Module Info tab say?
Click to expand...

What he said.....The rest of your modules are online, you have keying disabled, so likely a full module mismatch (wrong model). If you go to the module tab it will compare the online module found with your project and you can see the differences.
 

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