Horner APG QX751 OCS - Manual (Page 90)

CH. 16 MAN0890-02-EN
August 20, 2009 Page 90 of 96 ECN # 979
16.1.1 Connecting Troubleshooting Checklist
1. Programming and debugging must use MJ1.
2. Controller must be powered up.
3. Assure that the correct COM port is selected in Cscape.
Tools/Options/Communications Port.
4. Assure that a straight through (non null modem) serial cable is being used between PC and
controller.
5. Check that a Loaded Protocol or ladder is not actively using MJ1. Taking the controller out of run
mode from the System Menu on the controller will make MJ1 available to Cscape.
6. Make sure the COM port of the PC is functioning. An RS-232 serial loopback and Microsoft
HyperTerminal can determine positively if the COM port is working. Or connect to an alternate
device to determine if the port is working.
7. Successful communications with USB-to-serial adapters vary. If in doubt, Horner APG offers a
USB to serial adapter. Part number HE500USB600.
16.2
Local Controller and Local I/O
The system menu provides the following status indications that are useful for troubleshooting and system
maintenance.
• Self-test results, diagnostics.
• RUN and OK status
• Network status and usage
• Average logic scan rate
• Application memory usage
• Loaded firmware versions
• Loaded
protocols
• CompactFlash
access
To view the system menu, press the System key on the keypad.
16.2.1 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. Ensure that software configuration is correct and make sure any jumpers on I.O modules are set
correctly.
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.
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.