major error fault for slc-500

[cvargas345]

Can someone explain to me what the major error S:6 155h means for a AB SLC-500. The error description box states that the discrete I/O module that is required for the user program has the wrong I/O count. This could mean a specialty card driver is incorrect. I am kind of new to plcs so I would appreciate it if someone could perhaps explain this to me. I having trouble understanding the terminology. Thanks in advance

 

[jde777]

Product(s):
1747-L5xx SLC Modular Hardware Style Controllers (SLC 5/01, 5/02, 5/03, 5/04 and 5/05)
RSLogix 500 Programming Software


Problem/Symptom(s):
- Error
"Discrete I/O module in slot XX which is required for the user program is detected as having the wrong I/O count.
This could also mean that a specialty card driver is incorrect."
- Error Code S:6=xx55h
- where xx (hex) is the Slot Number of the card/module in question
(Hex=Decimal; 0A=10, 0B=11, 0C=12, ...etc)


Advice; Reference Manual (1747-rm001):

Error Code (Hex)
xx55

Description
A discrete I/O module required for the user program is detected as having the wrong I/O count.
This code can also mean that a specialty card driver is incorrect.

Probable Cause
- If this is a discrete I/O module, the I/O count is different from that selected in the I/O configuration.
- If this is a specialty I/O module, the card driver is incorrect.

Recommended Action
- If this is a discrete I/O module, replace it with a module having the I/O count selected in the I/O configuration.
Then, clear the fault and run, or
- change the I/O configuration to match the existing module, then reload the program and run.
- If this is a specialty I/O module, refer to the user manual for that module.


Additional Advice:

A)
- make sure the Module is placed/seated correctly
- turn OFF the power to the Chassis, then push the module all the way in
- restore power to the Chassis

B)
- there may be a defective Slot on the Chassis Backplane
- as a test, try using the module in another Slot on the Chassis Backplane
- use the RSLogix 500 >> I/O Configuration to drag the module from its Slot to another spare Slot
- if you drag the module, then RSLogix500 should offer to change all the addressing automatically
- turn OFF the power to the Chassis, then swap the Module to its new configured Slot
- restore power to the Chassis

C)
- if using an Extended Local Chassis
- make sure the Interconnect Cable (1746-Cxx) is connected correctly between the two Chassis
- make sure the Extended Chassis is powered by its own Power Supply (1746-Px)

D)
- check the Ladder Project (.ACH .RSS) file
- go to RSLogix 500 >> I/O Configuration
- select the module in the Slot that has the problem
- press [Adv Config] button
- check to make sure it has the correct settings for Input (xx) and Output (yy)
Scanned Input Words : xx
Scanned Output Words : yy

E)
- there could be a problem with the Chassis Backplane
- replace the Chassis

 

[marshg]

Rockwell has a decent website to find some of this information as well. Go to

http://www.rockwellautomation.com/support/

and click on knowledgebase. You will have to register. Also, you can click on the 'Literature' hyperlink and do a search on SLC User Manual. You will eventually be able to find a manual that will explain to you what that code means.