Specifications

Reference HART ♦ ProLinx Gateway
Driver Manual HART Master
ProSoft Technology, Inc. Page 93 of 119
July 7, 2009
COMMAND 110 - Read All Dynamic Variables
Description
This command gets all dynamic Variables.
Write Parameters
NONE
Floating Point Data Returned
Word High Byte Low Byte
0
1
Primary Variable
2
3
Second Variable
4
5
Third Variable
6
7
Fourth Variable
Integer Data Returned
Word High Byte Low Byte
0 STATUS WORD
1 Primary Variable Units Code Second Variable Units Code
2 Third Variable Units Code Fourth Variable Units Code
5.3 ProLinx HART Field Connections
HART field instruments are divided into four categories; A through D, depending
on power requirements and whether the device sinks or sources a bias or
operating current from the network. The following table defines the categories:
Type Description
A
Type A field instruments sink direct current from the network and receive operating power
from the network.
B
Type B field instruments sink direct current from the network but receive no operating
power from the network.
C
Type C field instruments source direct current to the network and receive no operating
power from the network.
D
Type D field instruments neither source nor sink direct current from the network, nor
receive operating power from the network.
On a given network, A, B, and D devices may be combined. C and D devices
may also be combined. A or B field instruments should not be combined with C
devices.