Tags; Logs - Siemens SIMATIC TP 270 Operating Instructions Manual

Alarm window
A configured alarm window shows all queued alarms or alarms of the relevant alarm class
which require acknowledgement. The alarm window opens when a new alarm is received.
You can configure the order in which the alarms are displayed. You can choose to sort
alarms in ascending or descending order of their occurrence. The alarm window can also be
set to indicate the exact location of the fault, including the date and time of the alarm event.
Alarm indicator
An alarm indicator icon is displayed if at least one error alarm is queued on the HMI device.
The indicator flashes as long as unacknowledged alarms are pending. The displayed
number indicates the number of pending alarms.
8.3

Tags

Definition
Tags represent defined memory areas on the HMI device to which values are written to or
read from. This action can be initiated on the controller or by the operator at the HMI device.
8.4

Logs

Overview
Alarm events and process values can be saved to log files.
Examples of alarm events are the incoming, acknowledged and outgoing events occurring
with an error alarm.
Process value logging is used for the following purposes:
• Early detection of danger / fault states
• Increase of productivity
• Enhancement of product quality
• Optimization of maintenance cycles
• Documentation of processes
• Quality assurance
TP 270, OP 270, MP 270B (WinCC flexible)
Operating Instructions, Edition 03/2004, 6AV6691-1DD01-0AB0
Runtime functionalities of a project
8.3 Tags
8-3