489
Description
EGD Error - One or more consumed exchanges contain unbound variables
Possible Cause
•
An EGD variable has been removed from a Producer's EGD configuration
•
An EGD variable has been added to a different Producer's EGD Page from its original EGD Page
Solution
•
Add the offending variable to the Producer's EGD configuration, compress the Page and download the application to the
Producer.
•
Remove the reference to the offending variable from the Consumer's application code; build and download application to
the Consumer.
•
Compress the EGD Page in the Producer where the variable has been added; build and download the application to the
Producer.
490
Description
Software watchdog has been disabled
Possible Cause
•
A runtime malfunction has disabled the software watchdog protective function
•
An invalid version of firmware has been downloaded
Solution
•
Reload base load, firmware, and application and restart.
•
If using a UCSA, reformat the flash and reload the firmware.
•
I/O pack or module: re-download the base load.
•
If this does not work, replace the controller or I/O module.
491
Description
Hardware watchdog has been disabled
Possible Cause
•
A runtime malfunction has disabled the hardware watchdog protective function
•
A hardware failure has disabled the hardware watchdog protective function
Solution
•
Reload firmware and restart.
•
If problem persists, replace hardware.
62
GEH-6855_Vol_II
GEH-6855_Vol_II Mark VIeS Functional Safety Systems Volume II
Public Information