At a Glance
The system diagnostic is performed automatically. When the PLC detects a system error (for example, a watchdog being exceeded, an input/output error, division by zero, etc.), information is sent to the diagnostic viewer. The diagnostic viewer will display a system error message if you have checked the System diagnostics checkbox.
Implementation
The following table describes the procedure to follow to use the system diagnostic on the Premium, Atrium and Quantum PLCs in Control Expert.
Step |
Action |
---|---|
1 |
Select Result: the project settings configuration window is displayed. |
2 |
In the Diagnostics area on the Build tab, check the System diagnostics checkbox. |
3 |
Confirm with OK. |
4 |
Build your project. |
5 |
Transfer your project to the PLC. |
6 |
Open the Diagnostic Viewer by selecting: .Result: the system diagnostic is operational and each system alarm now appears in the Viewer. |
List of system alarms monitored
The following table summarizes the system information monitored automatically by the system diagnostic service.
System object |
Succinct description of the alarm |
---|---|
%S10 |
Input/output error |
%S11 |
Watchdog overflow! |
%S15 |
Character string fault |
%S18 |
Overflow or arithmetic error |
%S19 |
Task period overrun |
%S20 |
Index overflow |
%S39 |
Saturation in event processing |
%S51 |
Time loss in real time clock |
%S65 |
Extract card command |
%S66 |
Backup application to the memory card |
%S67 |
State of the PCMCIA application memory card battery |
%S68 |
State of processor battery |
%S76 |
Diagnostic buffer configured |
%S77 |
Diagnostic buffer full |
%S96 |
Previously backup program |
%S118 |
General Fipio I/O fault |
%S119 |
General in-rack I/O fault |
%SW0 |
Master task scanning period |
%SW1 |
Fast task scanning period |
%SW2 |
Period of auxiliary task scanning 0. |
%SW3 |
Period of auxiliary task scanning 1. |
%SW4 |
Period of auxiliary task scanning 2. |
%SW4 |
Period of auxiliary task scanning 3. |
%SW11 |
Watchdog duration |
%SW17 |
Error status for floating operation |
%SW76 |
Diagnostic function: save |
%SW77 |
Diagnostic function: de-registration |
%SW78 |
Diagnostic function: number of errors |
%SW96 |
Save/restore %MW in flash memory. |
%SW97 |
Storage card error code |
%SW125 |
Type of blocking error |
%SW146 |
Fipio bus arbiter function display |
%SW153 |
List of Fipio channel manager faults |
%SW154 |
List of Fipio channel manager faults |