Siemens PC 670 Wartungshandbuch Seite 127

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Hardware Information
6-11
SIMATIC Panel PC 670 Computing Unit Equipment Manual
Edition 12/01
6.6 Monitoring Functions
The LEDs described in the following sections are only available on specific
versions of the device. The basic configuration of the computing unit does not have
any LEDs. The hardware signals are described in section 6.7.2.
6.6.1 Overview
Function
The following individual functions are implemented:
S temperature monitoring and indication of overheating and underheating
S watchdog
Messages can be passed by the monitor modules to applications.
The program SOM (Safecard on Motherboard) and drivers for Win NT and
Windows 98 are available on the devices for this purpose. These tools can be used
to display the status and assign parameters to limit values.
You will find a description of the drivers and the SOM program in the SafeCard
directory on the Documentation and Drivers CD supplied to you.
6.6.2 Signals at the Front-Side Port
The indications have the following meanings:
LED OFF YELLOW
Temp System turned off Inside temperature outside permissible range.
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