Manual

Communicating with the Smart
Transmitter Interface
Chapter 4
Communicating with the Smart Transmitter
Interface
4-6
Figure 4.3
HART
Poll Packets  Smart T ransmitter Interface to HART Field Device (Short Frame
Format)
90069
Hart Command
Short Frame HAR T Address
HAR
T Delimiter
Preamble
Byte Count
Data
Check Byte
Slave Address Bits
Logical Address Bits
Master Address Bit
0 Secondary Master
1 Primary Master
Frame Type
010 STX Frame
Reserved
Long/Short Frame Bit
0 Short
1 Long
0
0000
0
Figure 4.4
HART
Poll Packets  Smart T ransmitter Interface to HART Field Device (Long Frame
Format)
90070
HART Command
Long Frame HAR T Address
HAR
T Delimiter
Preamble
Byte Count
Data
Check Byte
Higher Order
Slave Address Bits
Master Address Bit
0 Secondary Master
1 Primary Master
Frame Type
010 STX Frame
Reserved
Long/Short Frame Bit
0 Short
1 Long
1
0000
0