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CHAPTER 5: COMMUNICATIONS
EPM 6000 MULTI-FUNCTION POWER METERING SYSTEM – USER GUIDE 5–7
5.1.3 Modbus Memory Map Notes
The memory map notes are indicated by number below.
1. All registers not explicitly listed in the table read as 0. Writes to these registers will be
accepted but won't actually change the register (since it doesn't exist).
7550 - 7554 Limit #2 SINT16
same as Limit #1 same as Limit #1 same as Limit #1
5
7555 - 7559 Limit #3 SINT16
5
755A - 755E Limit #4 SINT16
5
755F - 7563 Limit #5 SINT16
5
7564 - 7568 Limit #6 SINT16
5
7569 - 756D Limit #7 SINT16
5
756E - 7572 Limit #8 SINT16
5
Block Size:
68
SECONDARY READINGS SECTION
Secondary Block
read-only except as noted
9C40 - 9C40 System Sanity Indicator UINT16 0 or 1 none 0 indicates proper meter operation
1
9C41 - 9C41 Volts A-N UINT16 2047 to 4095 volts 2047= 0, 4095= +150
1
9C42 - 9C42 Volts B-N UINT16 2047 to 4095 volts
volts = 150 * (register - 2047) / 2047
1
9C43 - 9C43 Volts C-N UINT16 2047 to 4095 volts
1
9C44 - 9C44 Amps A UINT16 0 to 4095 amps 0= -10, 2047= 0, 4095= +10
1
9C45 - 9C45 Amps B UINT16 0 to 4095 amps
amps = 10 * (register - 2047) / 2047
1
9C46 - 9C46 Amps C UINT16 0 to 4095 amps
1
9C47 - 9C47 Watts, 3-Ph total UINT16 0 to 4095 watts 0= -3000, 2047= 0, 4095= +3000
1
9C48 - 9C48 VARs, 3-Ph total UINT16 0 to 4095 VARs watts, VARs, VAs =
1
9C49 - 9C49 VAs, 3-Ph total UINT16 2047 to 4095 VAs 3000 * (register - 2047) / 2047
1
9C4A - 9C4A Power Factor, 3-Ph total UINT16 1047 to 3047 none
1047= -1, 2047= 0, 3047= +1
pf = (register - 2047) / 1000
1
9C4B - 9C4B Frequency UINT16 0 to 2730 Hz
0= 45 or less, 2047= 60, 2730= 65 or
more
freq = 45 + ((register / 4095) * 30)
1
9C4C - 9C4C Volts A-B UINT16 2047 to 4095 volts 2047= 0, 4095= +300
1
9C4D - 9C4D Volts B-C UINT16 2047 to 4095 volts
volts = 300 * (register - 2047) / 2047
1
9C4E - 9C4E Volts C-A UINT16 2047 to 4095 volts
1
9C4F - 9C4F CT numerator UINT16 1 to 9999 none
CT = numerator * multiplier /
denominator
1
9C50 - 9C50 CT multiplier UINT16 1, 10, 100 none
1
9C51 - 9C51 CT denominator UINT16 1 or 5 none
1
9C52 - 9C52 PT numerator UINT16 1 to 9999 none
PT = numerator * multiplier /
denominator
1
9C53 - 9C53 PT multiplier UINT16 1, 10, 100 none
1
9C54 - 9C54 PT denominator UINT16 1 to 9999 none
1
9C55 - 9C56 W-hours, Positive UINT32 0 to 99999999 Wh per energy format * 5 to 8 digits
2
9C57 - 9C58 W-hours, Negative UINT32 0 to 99999999 Wh per energy format
* decimal point implied, per energy
format
2
9C59 - 9C5A VAR-hours, Positive UINT32 0 to 99999999 VARh per energy format
* resolution of digit before decimal
point = units, kilo, or mega, per energy
format
2
9C5B - 9C5C VAR-hours, Negative UINT32 0 to 99999999 VARh per energy format
2
9C5D - 9C5E VA-hours UINT32 0 to 99999999 VAh per energy format * see note 10
2
9C5F - 9C5F Neutral Current UINT16 0 to 4095 amps see Amps A/B/C above
1
9C60 - 9CA2 Reserved N/A N/A none
67
9CA3 - 9CA3
Reset Energy
Accumulators
UINT16
password
5
write-only register; always reads as 0
1
Block Size:
100
HEX
ADDRESS
DESCRIPTION
1
FORMAT RANGE
6
UNITS OR
RESOLUTION
COMMENTS # REG