Black Box IC108A Betriebsanweisung PDF herunterladen (Seite 64)

Advant

Smart Device (HART

) Interface User’s Guide

Chapter 3 Configuration

3-10 3BUR 001 085R0001 REV A

DO RATE Field

The DO RATE field specifies the minimum resolution of any pulse output for the controller. For

pulse train outputs, the pulse width and pulse interval as specified through the PO CHANNEL

NUMBER edit window of the Controller I/O Templet must be multiples of the DO Rate. For

pulse duration outputs, the duration value calculated by the Pulse Duration FCM is rounded to

the next lower multiple of the DO Rate.

Valid entry is:

a number of milliseconds as either 20, 40, 100, 200, or 1000

Default is: 20

NOTE

Digital inputs are scanned at one half the DO RATE. This is important because

using the DO RATE default value of 20 ms when no pulse outputs are present will

lead to a high CPU load. The scan rate for smart devices is not affected by the

DO RATE field.

3.3.4 MVI Module and Port Planning

The serial port parameters are specified on MVIBOARD and MVI_PORT objects. Each SHIM

connected to smart device requires a serial channel for which you define parameters via these

objects.

An Advant Controller 410 is equipped with either one or two MVI modules depending upon the

number of serial ports required. A MVIBOARD Templet must be completed for each MVI

module and an MVI_PORT Templet for each port of the MVI module.

An Advant Controller 460 can have up to 4 MVI modules (8 serial ports). One MVIBOARD

Templet is required for each MVI module and an MVI_PORT Templet for each port of the MVI

module.

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Black Box IC108A Betriebsanweisung Seite 64