Harris ADC 100, Руководство пользователя

Страница: 103 / 128

Harris ADC Device Server User’s Guide
Switch-Only Device Configuration 7-5
GPI Sheet Tab
GPI Card
Indicates which GPI card is connected to the device activated by this event
Contact Number
Specifies the contact number (i.e., relay number) on the GPI card to which the external
device is connected. The contacts are numbered 0 to 7 by the GPI board and 1 to 8 by the
ADC Device Server. You must add 1 to the GPI board number when you enter the contact
number. For example, a device wired to pins 2 (COM 2) on the board should be entered as
having Contact number 3
Pulse Width
Specifies the duration of the GPI contact, in frames (i.e., the length of time the contacts are
closed), for primary GPI events. The GPI contact closes when the event goes into preroll.
For secondary events, the contact duration is specified by the event itself.
Pulse Offset
Specifies the contact closure offset (in frames) for the primary/secondary event associated
with a Switch Only device. The contact can be closed at any time during preroll. When the
value is set to zero, the contact closure is closed, starting at preroll, for the duration
specified for Pulse Width. When the value is greater than zero, the contact is closed when
the number of frames remaining in preroll reaches this value. The Pulse Offset value is
backtimed from the end of preroll, not from the beginning of preroll. The value must not