4ć33 – Rockwell Automation 1770-HT8 SMART TRANSMITTER User Manual
Page 98
Chapter 4
C
Communicating with the Smart
Transmitter Interface
4-33
Table 4.R
Smart Transmitter Interface to Programmable ControllerĆ BTR Data Long Frame
Format for Response to HART Command 1
Octal Bits
17
16
15
14
13
12
11
10
07
06
05
04
03
02
01
00
Decimal Bits
15
14
13
12
11
10
09
08
07
06
05
04
03
02
01
00
Word 00
Smart Transmitter Interface Channel Number
Smart Transmitter Interface Command
Word 01
Smart Transmitter Interface Status
Smart Transmitter Interface Error Code
Word 02
HART Address
HART Delimiter
Mas
Adr
Bur
Mde
Manufacturer
Identification Code
Lng
Frm
0
0
0
0
Frame Type
Word 03
Device ID
(Most Significant Byte)
Manufacturer's
Device Type
Word 04
Device ID
(Least Significant Byte)
Device ID
(Middle Byte)
Word 05
Byte Count
HART Command
Word 06
HART Response Code
Second Byte
First Byte
Word 07
Primary Variable
(Most Significant Byte)
Primary Variable
Units
Word 08
Primary Variable
(3rd Most Significant Byte)
Primary Variable
(2nd Most Significant Byte)
Word 09
Check Byte
Primary Variable
(Least Significant Byte)
Table 4.S
Example BTR Data Offset at D9:40 Ć Long Frame Format for HART 1 Command
Address
0
1
2
3
4
5
6
7
8
9
D9:40
0110
8000
A686
000D
1115
0701
0000
4220
3991
B356
Long Frame Word Contents Ć Smart Transmitter Interface to
Programmable Controller (Offset at D9:40)
Word 00: Smart Transmitter Interface Command is hexadecimal 10 (low
byte); Smart Transmitter Interface Channel is hexadecimal 01 (high
byte).
Word 01: Smart Transmitter Interface Error Code is hexadecimal 00
indicating no errors (low byte); Smart Transmitter Interface Status is
hexadecimal 80 indicating the Smart Transmitter Interface has been
reset (high byte).