Specifications

Functional Overview
ProLinx Communication Gateways, Inc. 10
HART Master Protocol Drive Manual
August 17, 2004
When the point-to-point mode of auto-polling is enabled (Auto-Poll Code = P), the
following diagram applies to the channel operation:
Poll Cmd 0
with address 0
Point- to-point
Read and store
configuration
Poll device for
data with
CMD 3
P<X
P++
P>=X
N
o device
Device found
P=0, C=0
C<Y
P=0,C++
Start
*
Communication failure
C>=Y
Where
P, C = loop iterators
X = Poll Counter (internal fixed value)
Y = HART configuration counter (internal
fixed value)