Appendix
A.2 System alarms
OP 73micro, TP 177micro (WinCC flexible)
Operating Instructions, 09/2007, 6AV6691-1DF01-0AB0
151
Protective measures against discharge of static electricity
CAUTION
Grounding measures
When working with electrostatic sensitive devices, make sure that the person, the
workplace and the packaging are properly grounded. This helps to avoid electrostatic
charge.
As a rule, only touch the ESD if this is unavoidable. Example: for maintenance. When you
touch modules, make sure that you do not touch the pins on the modules or the PCB tracks.
This prevents any discharge of static electricity to sensitive component and thus avoids
damage.
Discharge electrostatic electricity from your body if you are performing measurements on an
ESD. To do so, touch a grounded metallic object.
Always use grounded measuring instruments.
A.2
System alarms
Introduction
System alarms on the HMI device provide information about internal states of the HMI device
and PLC.
The overview below shows the causes of system alarms and how to eliminate the cause of
error.
Depending on functionality, only parts of the system alarms described in this section apply to
the various HMI devices.
Note
System alarms are only indicated if an alarm window was configured. System alarms are
output in the language currently set on your HMI device.
System alarm parameters
System alarms may contain encrypted parameters which are relevant to troubleshooting
because they provide a reference to the source code of the Runtime software. These
parameters are output after the text "Error code:"
