GE Industrial Solutions EPM1500 Single Point Submetering System - Manual (Page 40)

4–8 EPM 1500 SUB-METER– INSTRUCTION MANUAL
CHAPTER 4: COMMUNICATIONS
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 4)
Hex
Addr
Addr Description R/W Units Notes
Fixed Value Registers (Read Only)
000 0 + 0000 Meter Serial Number R 32-bit long integer
0002 + 0002 Meter Serial Number Extension R
Returns same value as address 0000
32-bit long integer
0004 + 0004 Meter Version Number R 32-bit long integer
0006 + 0006 Meter Version Number Extension R
Returns same value as address 0000
32-bit long integer
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 EPM 1500
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
Transponder
R
0014 0020
Current slot being read in
Transponder
R/W
Interval Setup
0031 0049 Store Interval Length R/W 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/W hours/
minutes
16-bit, Hours: 0-23 (bitmask = FF00)
Minutes: 0-59 (bitmask = 00FF
0033 0051 Internal Time - Seconds R/W seconds
0034 0052 Internal Date - Month/Day R/W month/day
0035 0053 Interval Date - Year R/W year