Hourly and daily history – Rockwell Automation 1758-RTU202 DataSite Software User Manual FRN 1.2 User Manual
Page 337

Publication 1758-UM002D-EN-P - October 2010
Enron Modbus Protocol for the 1758-FLO DataSite Controller 337
Hourly and Daily History
Enron Modbus hourly/daily archive registers are used to read the hourly and
daily logs on the 1758-FLO DataSite controller. The records are read one at a
time.
Each hourly and daily record has a fixed length with 64 float data bytes in the
following format as shown in the table.
Meter run 7 data variables
Register
Data Type
Description
3401…3500
Short integer
Meter run 7 data variables
•
Identical structure to meter run 0 data variables.
•
Offset by a value of 350.
5071…5080
Long integer
Meter run 7 data variables
•
Identical structure to meter run 0 data variables.
•
Offset by a value of 70.
7701…7800
Float
Meter run 7 data variables
•
Identical structure to meter run 0 data variables.
•
Offset by a value of 700.
Format of hourly and daily records
Field
Size
Type
Description
Date
4
FLOAT
Log date: MMDDYY.0
Time
4
FLOAT
Log time: HHMMSS.0
P_avg
4
FLOAT
Average pressure
T_avg
4
FLOAT
Average temperature
DP_avg
4
FLOAT
Average differential pressure or meter pulses
Gr
4
FLOAT
Relative density
Flow time
4
FLOAT
Run time yesterday
Volume_B
4
FLOAT
Total volume at base conditions
Volume_F
4
FLOAT
Total volume at flowing conditions
Volume_M
4
FLOAT
Total mass
Extension
4
FLOAT
Extension or uncorrected flow volume
Q Energy
4
FLOAT
Energy
VAR1
4
FLOAT
User defined variable