GE Industrial Solutions EPM4500 Submeter - Manual (Page 51)

CHAPTER 4: COMMUNICATIONS MODBUS MEMORY MAP
EPM 4500 SUB METER – INSTRUCTION MANUAL 4–9
4.3 Modbus Memory Map
4.3.1 Memory Map
The Modbus memory map is shown below.
Table 4–1: Modbus Memory Map (Sheet 1 of 15)
Hex
Addr
Addr Description R/W Units Notes
Fixed Value Registers (Read Only)
0000 + 0000 Meter Serial Number R hex digits
0002 + 0002 Meter Serial Number Extension R hex digits Returns same value as address 0000
0004 + 0004 Meter Version Number R hex digits
0006 + 0006 Meter Version Number Extension R hex digits Returns same value as address 0000
0008 0008 Meter Modbus Address R --- 8-bit Modbus Address in LSB
Setup Information
0009 0009 Baud Rate R
000C 0012 Meter Status R --- Always 1 for Modbus.
000D 0013 Meter Ready R --- Always 1 for Modbus.
000E 0014 Number of Meters Configured R --- Always 1 for EPM4500
000F 0015 Number of Real-Time Points Configured R
0010 0016 Number of Interval Points Configured R Returns 0 if intervals are disabled
0011 0017 Number of Max/Min Points Configured R Always returns 0
0012 0018 Maximum Number of Intervals That Can Be Recorded R
Dependent upon the number of parameters optioned
and the number of meters returned in address 0015
0013 0019 Number of slots configured for Scan Transponder R
0014 0020 Current slot being read in Scan Transponder W
Interval Setup
0031 0049 Store Interval Length R minutes
Interval length in minutes must be evenly divisible into 60
(1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60)
Read Clock
0032 0050 Internal Time - Hours/Minutes R hours/minutes
16-bit, Hours: 0-23 (bitmask = FF00)
Minutes: 0-59 (bitmask = 00FF
0033 0051 Internal Time - Seconds R seconds
0034 0052 Internal Date - Month/Day R month/day
0035 0053 Interval Date - Year R year
0036 0054 Internal Time - Hours/Minutes W hours/minutes
16-bit, Hours: 0-23 (bitmask = FF00)
Minutes: 0-59 (bitmask = 00FF
0037 0055 Internal Time - Seconds W month/day
0038 0056 Internal Date - Month/Day W Year 16-bit Unsigned Integer
0039 0057 Interval Date - Year W 16-bit Unsigned Integer