ProSoft Technology PTQ-AFC User Manual
Page 80
Quick Start
PTQ-AFC ♦ Modicon Quantum Platform
User Manual
Liquid and Gas Flow Computer for Hydrocarbon Products
Page 80 of 259
ProSoft Technology, Inc.
June 23, 2011
Meter-relative Data
Meter-relative data starts at absolute holding register address 8000 and occupies
2000 words of data for each meter channel.
The meter-relative addresses are offsets within each meter data area. The
correct absolute address is calculated by the following formula (assumes meters
are numbered starting with 1):
(absolute address) = (2000 * (meter number-1)) + 8000 + (meter relative
address)
In the Modbus Dictionary dialog box, addresses listed for the selected meter are
absolute addresses, so you should subtract the appropriate multiple of 8000 to
calculate the meter-relative address.