ProSoft Technology MVI56-AFC - Manual (Page 247)

MVI56-AFC ♦ ControlLogix Platform MVI56-AFC Sample Logic
Liquid and Gas Flow Computer User Manual
ProSoft Technology, Inc. Page 247 of 316
February 25, 2011
Example 2 - Read Net Accumulator Totalizer From Yesterday’s Archive (Meters
1 to 4) (assume orifice meters, gas product)
Perform the following steps:
This application only transfers 8 words (each totalizer occupies 2 words).
Because the number of words is less than 200, it means that only one Modbus
Gateway block will be used (AFC56.Modbus.Gateway[0])
1 Configure the AFC56.Modbus.BlockCount tag with a value of 1.
2 In order to identify the register addresses in the Primary Modbus Slave, refer
to the following spreadsheet that shows the addresses for the hourly and
daily archives:
Input Registers
Mete
r Start Daily Archive End Daily Archive Start Hourly Archive End Hourly Archive
1 0 1059 1060 2499
2 2500 3559 3560 4999
3 5000 6059 6060 7499
4 7500 8559 8560 9999
5 10000 11059 11060 12499
6 12500 13559 13560 14999
7 15000 16059 16060 17499
8 17500 18559 18560 19999
9 20000 21059 21060 22499
10 22500 23559 23560 24999
11 25000 26059 26060 27499
12 27500 28559 28560 29999
13 30000 31059 31060 32499
14 32500 33559 33560 34999
15 35000 36059 36060 37499
16 37500 38559 38560 39999
Each archive occupies a 30-word block. For example, for meter 1:
Archive Start Register End Register
Yesterday 0 29
2 days ago 30 59
3 days ago 60 89
4 days ago 90 119
5 days ago 120 149
… …