Rockwell Automation 1770-HT8 SMART TRANSMITTER User Manual
Page 94
Chapter 4
C
Communicating with the Smart
Transmitter Interface
4-29
Word 01: Smart Transmitter Interface control hexadecimal 00 indicating
a response is required from the Smart Transmitter Interface (low byte);
Smart Transmitter Interface parameter hexadecimal 00 (high byte).
Word 02: HART delimiter hexadecimal 02 indicating an STX frame
with a short frame address (low byte); HART short frame address
hexadecimal 80 indicating primary master, and logical and slave
addresses 0 (high byte).
Word 03: HART command hexadecimal 00 (low byte); HART packet
byte count of hexadecimal 00 (high byte).
Word 04: HART packet check byte set to 0 (low byte); zero padding
(high byte).
Table 4.N
Smart Transmitter Interface to Programmable Controller Ć BTR Data Short Frame
Format for Response to Hart Command 0
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
Logical
Address
Slave Address
Lng
Frm
0
0
0
0
Frame Type
Word 03
Byte Count
HART Command
Word 04
HART Response Code
Second Byte Count
First Byte
Word 05
Manufacturer Identification
Code
1
1
1
1
1
1
1
0
Word 06
Number of
Preambles
Manufacturer's Device
Type Code
Word 07
Transmitter Specific
Revision
Universal Command
Revision
Word 08
Hardware
Revision
Software
Revision
Word 09
Device ID
(Most Significant Byte)
Flags
Word 10
Device ID
(Least Significant Byte)
Device ID
Middle Byte
Word 11
0
0
0
0
0
0
0
0
Check Byte