Horner APG XL7 OCS - Manual (Page 104)

XL7 User Manual
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Average logic scan rate
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Application memory usage
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Loaded firmware versions
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Loaded protocols
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Removable media access
To view the system menu, press the System key.
19.2.1 Local I/O Troubleshooting Checklist
1. Verify the controller is in RUN mode.
2. Check diagnostics to insure controller passed self-tests.
View diags in System Menu or in Cscape, click; Controller/Diagnostics
3. Check data sheets to insure proper wiring.
4. Insure that hardware jumpers and software configuration for I/O match.
5. Check data sheets for voltage and current limits.
6. Take ladder out of the picture. From Cscape set controller to “Do I/O” mode. In this mode inputs
can be monitored and outputs set from a data watch window in Cscape without interference from
the ladder program. Some I/O problems are only a result of a mistake in the ladder program.
19.3 CsCAN Network
For complete information on setting up a CsCAN network, refer to CAN Networks manual (MAN0799) by
visiting the Horner websites for the address to obtain documentation and updates.
Network status, node ID, errors, and baud rate in the controller system menu are all in reference to the
CsCAN network. These indications can provide performance feedback on the CsCAN network and can
also be used to aid in troubleshooting.
19.3.1 CsCAN Network Troubleshooting Checklist
1. Use the proper Belden wire type or equivalent for the network as specified in MAN0799.
2. The XL7 OCS does not provide 24VDC to the network. An external voltage source must be
used for other devices such as SmartStix I/O.
3. Check voltage at both ends of the network to insure that voltage meets specifications of
attached devices.
4. Proper termination is required. Use 121-ohm (or 120-ohm) resistors at each end of the
network. The resistors should be placed across the CAN_HI and CAN_LO terminals.
5. Measure the resistance between CAN_HI and CAN_LO. If the network is properly wired and
terminated there should be around 60 ohms.
6. Check for duplicate node ID’s.
7. Keep proper wires together. One twisted pair is for V+ and V- and the other twisted pair is
used for CAN_HI and CAN_LO.
8. Make sure the baud rate is the same for all controllers on the network.
9. Assure shields are connected at one end of each segment -- they are not continuous through
the network.
10. Do not exceed the maximum length determined by the baud rate and cable type.
WARNING: Setting outputs ON in Do I/O mode can result in injury or cause machinery
to engage in an unsafe manner depending on the application and the environment.
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