Publication 1752-UM001A-EN-P - October 2006
126 Monitor Status and Handle Faults
Error History Table
When an error is detected, a record is made in the error history table
in the controller’s RAM. If the number of error records exceeds the
maximum of 100, the oldest records are deleted sequentially and the
most recent error data is stored as a new record.
The error history table stores the controller’s status when the error
occurred, the time at which the error occurred (total operating time of
the controller
(1)
), and the node address where the error occurred.
Error History Memory Area
The description of an error is recorded as an error history entry in the
controller’s RAM. If the error is critical, it is also saved in nonvolatile
memory. The error history recorded in nonvolatile memory is retained
even when the controller does not have power or the controller is
restarted. The error history in nonvolatile memory is copied to the
controller’s RAM at the start of a controller power cycle. The error
history in RAM is read when reading the error history from RSNetWorx
for DeviceNet software. When clearing the error history, however, the
error histories in both RAM and nonvolatile memory are cleared.
Display the Error History Table
Follow these steps to display the error history in real time using
RSNetWorx for DeviceNet software while online with the controller.
1. Right-click the SmartGuard controller and choose Properties.
(1) The total operating time of the controller is recorded as the accumulated time in 6 minute increments while the
power supply for V0, G0 is on. The total operating time is cleared by the controller Reset Command.
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