Euresys 1669-DR Picolo.net HD1, Руководство пользователя

Страница: 93 / 150

93
The element <State> specifies the state of the alarm input port. Possible values are:
n
OPEN : the alarm input port has detected an high-impedance. Possible causes are:result of an
open contact or an unused port.
n
HIGH : the alarm input port has detected a voltage above the voltage threshold.
n
LOW : the alarm input port has detected a closed contact or a logical low level, namely a
voltage below the voltage threshold.
InputConfiguration type
This type is composed of:
n
Element <VoltageThreshold> of type eur:VoltageThresholdEnum.
n
Element <TimingFilter> of type eur:TimingFilterEnum
n
Element <EnableEvents> of type xs:boolean
The element <VoltageThreshold> specifies the voltage threshold of the alarm input port. Possible
values are:
n
TTL : The threshold voltage is 1.4 Volt . This is suitable for TTL devices,3 volt CMOS devices,
or potential-free contacts.
n
5V CMOS : The threshold voltage is 2.5 Volt. This is suitable for 5 volt CMOS devices.
n
12V : The threshold voltage is 6 Volt. This is suitable for 12 volt or higher CMOS devices.
The element <TimingFilter> specifies the strength (time constant) of the noise filter of the alarm
input port. Possible values are:
n
OFF : the noise filter is set to a minimal strength.
n
10ms : the noise filter is set to a medium strength. It filters out signal transients shorter than
10 milliseconds.
n
100ms : the noise filter is set to a maximal strength. It filters out signal transients shorter
than 100 milliseconds.
Software Specifications Picolo.net Handbook