Black Box IC108A Betriebsanweisung PDF herunterladen (Seite 88)

Advant

Smart Device (HART

) Interface User’s Guide

Chapter 3 Configuration

3-34 3BUR 001 085R0001 REV A

You can assure that the result of the FCM has the number of decimal places required for the loop

by taking appropriate steps when programming the smart device, and by entering appropriate

values in the fields. See the following examples.

Example 1

To obtain an integer result that equals the counts:

The value of a particular integer variable, having a range of 0 to 1000, will be directly stored in

and read from the smart device. This value is to be sent to channel 5 in the analog channel table

of the smart device interface. To use this variable as the input for a continuous loop in the MOD

System, you can proceed as follows when configuring the smart device, the smart device

interface, and the analog input FCM for the related loop.

In the smart device—Store the variable in a portion of smart device memory from which it will

be read when appropriate command(s) are received during scans by the interface. (See Chapter

1, Introduction.)

In the Advant OCS System—Use the SMARTNET templet, as described in Section 3.3.5.4,

SMARTNET Object, to arrange for the stored value in the smart device to be sent to a channel

(number 5 in this example) in the analog channel table of the interface.

For the Related Loop in the Advant OCS Data Base—Include the following entries on the

Analog Input Templet to achieve an analog input FCM result equal to the original value of the

variable in the smart device.

LC is the COUNTS—LOWER BOUND field entry

HU is the ENGU—UPPER BOUND field entry

LU is the ENGU—LOWER BOUND field entry

HC is the COUNTS—UPPER BOUND field entry

Field of Templet Entry

CHANNEL NUMBER 5

COUNTS—LOWER BOUND 0

COUNTS—UPPER BOUND 1000

ENGU—LOWER BOUND 0

ENGU—UPPER BOUND 1000

1 2 ... 83 84 85 86 87 88 89 90 91 92 93 ... 117 118

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Black Box IC108A Betriebsanweisung Seite 88