Horner APG XLt OCS - Manual (Page 94)

CH. 18 MAN0878-04-EN
August 12, 2009 Page 94 of 100 ECN # 979
18.1.1 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.
8. XLe/XLt units without Ethernet must use MJ1 for programming and debugging. If Ethernet is
installed it can be selected as the programming port. The selection is made in the controller's
System Menu. If there are difficulties connecting, make sure that the default programming port is
set correctly with the connection method being attempted.
18.2
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
• Removable
media access
To view the system menu, press the UP and DOWN arrow keys simultaneously. See CHAPTER 11 for
full details on the system menu diagnostic capabilities.
18.2.1 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.
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.