Spectrum Controls 1734sc-IE2CH - Manual (Page 69)

Appendix B: Additional HART Protocol Information B-9
User’s Manual Pub. 0300257-01 Rev. A
Command Data in Command Data in Reply Contained in
No. Function Byte Data Type
(6)
Byte Data Type
(6)
Input
Tag
CIP
MSG
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)
(2)
(3)
(4)
(5)
(6)
(7)
(8) 0 = exit Fixed Current mode.
Truncated after last requested code.
0 = burn EEPROM, 1 = copy EEPROM to RAM.
Truncated after last requested code.
Not a number exits Fixed-output mode.
(A) = Packed ASCII, (B) = 3-byte integer, (D) = Date, (F) = Floating Point (HART format), (H) = HART flag
Truncated after last requested code.
Truncated after last requested variable.
Section B.3
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 1734sc-IExCH Input Tag.
HART PVStatus, SVStatus, TVStatus, FVStatus are known as Device Variable Status
values. These Status values are composed of groups of bits that indicate the quality of the
associated device variable.