Rockwell Automation 1756-OF8H ControlLogix HART Analog I/O Modules - Manual (Page 202)

202 Rockwell Automation Publication 1756-UM533C-EN-P - February 2011
Appendix C Additional HART Protocol Information
HART PV, SV, TV, and FV
Status HART PV, SV, TV, and FV are dynamic variables that contain the values of
device variables, which are various direct or indirect process measurements
performed by the HART field device.
Some devices let a set of their internal device variables be mapped to the PV, SV,
TV, FV dynamic variables that are automatically collected in the 1756-IF8H
Input Tag.
This mapping is part of the field device configuration, usually performed via a
handheld configurator or asset management system, such as FactoryTalk
AssetCentre or Endress+Hauser FieldCare system.
108 Write Burst
mode
command
number 0 Burst mode
command number As in command
109 Burst mode
control 0 Burst mode control
code (0 = exit, 1 =
enter)
110 Read all
dynamic
variables None 0
1…4
5
6…9
10
11…14
15
16…19 PV units code
PV value
SV units code
SV value
TV units code
TV value
FV units code
FV value
(F)
(F)
(F)
(F)
x
x
x
x
x
x
x
x
x
x
x
x
(1) 0 = exit Fixed Current mode.
(2) Truncated after last requested code.
(3) 0 = burn EEPROM, 1 = copy EEPROM to RAM.
(4) Truncated after last requested code.
(5) Not a number exits Fixed-output mode.
(6) (A) = Packed ASCII, (B) = 3-byte integer, (D) = Date, (F) = Floating Point (HART format), (H) = HART flag
(7) Truncated after last requested code. Truncated after last requested variable.
(8) Truncated after last requested level.
Table 76 - Common Practice Commands
Command Data in Command Data in Reply Contained in
No. Function Byte Data Type
(6)
Byte Data Type
(6)
Input
Tag CIP
MSG