Rockwell Automation 1758-RTU202 DataSite Software User Manual FRN 1.2 - Manual (Page 272)

Publication 1758-UM002D-EN-P - October 2010
272 Extension Modbus Protocol for DataSite Controllers (1758-FLO)
Parameters in calculation results block 1
Parameter Name Description Data Type Modbus Addresses
for Meter Run 0
Parameters (= X)
DP/PI Differential pressure real-time acquisition value (AGA3 only),
pulse count real-time acquisition value (/sec.) (AGA7 only) float/u_int 30101…30102
P Static pressure real-time acquisition value float 30103…30104
T Temperature real-time acquisition value float 30105…30106
avh_dp Average differential pressure for the hour float 30107…30108
avh_p Average static pressure for the hour float 30109…30110
avh_t Average temperature for the hour float 30111…30112
avd_dp Average differential pressure for the day float 30113…30114
avd_p Average static pressure for the day float 30115…30116
avd_t Average temperature for the day float 30117…30118
pi_pre Total number of pulses for the previous second u_int 30119…30120
qmh Transient mass hour flow rate float 30121…30122
qvbh Transient volume hour flow rate (base condition) float 30123…30124
qvfh Transient volume hour flow rate (flowing condition) float 30125…30126
qm_today Mass quantity for the current day float 30127…30128
qvn_today Volume quantity in base conditions for the current day float 30129…30130
qvf_today Volume quantity in flowing conditions for the current day float 30131…30132
qm_yesterday Mass quantity for the previous day float 30139…30140
qvn_yesterday Volume quantity in base conditions for the previous day float 30141…30142
qvf_yesterday Volume quantity in flowing conditions for the previous day float 30143…30144
qm_all Total quantity of mass flow u_int 30145…30146
qvn_all Total quantity of volume at base conditions u_int 30147…30148
qvf_all Total quantity of volume at flowing conditions u_int 30149…30150
Ftime_today (cntDay) Total flow time of the previous day u_int 30157…30158
cntDay_add Total flow time of the current day u_int 30159…30160
Ftime_thishour
(cntHour) Total flow time of last hour u_int 30161…30162
cntHour_add Total flow time of the current hour u_int 30163…30164
Intermediate results
Zb Natural gas compressibility factor in base conditions float 30165…30166
Zf Natural gas compressibility factor in flowing conditions float 30167…30168
Gr Real relative density float 30177…30178
EXT Square root of the product of static pressure and differential pressure.
This is also the uncorrected volume (AGA7). float 30199…30200