Maxim Integrated 6613-OMU-2+2S-URT-V100 User Manual

AVAILABLE

USER GUIDE

6613_OMU_2+2S_URT_V100

Firmware Description Document

November 9, 2011

Rev. 1.1

UG_6613_060

6613_OMU_2+2S_URT_V1_00 Firmware Desc rip tio n Doc ument UG_6613_060

Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit
patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.

Maxim Integr ated Products, 12 0 San Gabriel Drive, Sun nyvale, CA 94086 408- 737-7600

 2011 Maxim Integrated Products Maxim is a registered trademark of Maxim Integrated Products.

UG_6613_ 060 6613_OMU_2+2S_URT_V1_00 Firmware Description Document

Table of Contents

1 Introduction ......................................................................................................................................... 5

2 Measurement Description .................................................................................................................. 6

2.1 Basic Measurement Equations ..................................................................................................... 6

2.2 Sample Rate and Accumulation Interval ...................................................................................... 6

3 Serial Communication ........................................................................................................................ 6

4 Command Line Interface .................................................................................................................... 7

4.1 Identification and Information Commands .................................................................................... 7

4.2 Reset Commands ......................................................................................................................... 7

4.3 MPU Data Access Command ....................................................................................................... 8

4.3.1 Individual Address Read .................................................................................................. 8

4.3.2 Consecutive Read ........................................................................................................... 8

4.3.3 Block Reads ..................................................................................................................... 9

4.3.4 Concatenated Reads ....................................................................................................... 9

4.3.5 U Command ..................................................................................................................... 9

4.4 Auxiliary Commands ................................................................................................................... 11

4.4.1 Repeat Command .......................................................................................................... 11

4.5 Calibration Commands ............................................................................................................... 12

4.5.1 Complete Calibration Commands (“Single Command Calibration”) .............................. 12

4.5.1.1 CAL Command ................................................................................................ 12

4.5.1.2 CALW Command ............................................................................................ 13

4.5.2 Atomic Calibration Commands ...................................................................................... 14

4.5.2.1 CLV Command ................................................................................................ 14

4.5.2.2 CLI Command ................................................................................................. 14

4.5.2.3 CLP Command ................................................................................................ 14

4.5.2.4 CLT Command ................................................................................................ 15

4.5.2.5 CLW Command ............................................................................................... 15

4.6 Relay Control Command ............................................................................................................ 16

4.6.1 TC Command................................................................................................................. 16

4.7 CE Data Access Commands ...................................................................................................... 17

4.7.1 Single Register CE Access ............................................................................................ 17

4.7.2 Consecutive CE Reads .................................................................................................. 17

4.7.3 CE Data Write ................................................................................................................ 17

4.7.4 U Command ................................................................................................................... 17

4.8 CE Control Commands ............................................................................................................... 19

4.8.1 Disable CE Command ................................................................................................... 19

4.8.2 Turn On CE Command .................................................................................................. 19

5 MPU Measurement Outputs ............................................................................................................. 20

6 Configuration Parameter Entry........................................................................................................ 29

6.1 MPU Parameters ........................................................................................................................ 29

E8-EF 35

6.2 CE Parameters ........................................................................................................................... 36

7 Address Content Summary.............................................................................................................. 40

8 Contact Information .......................................................................................................................... 45

Document Revision History ..................................................................................................................... 46

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Tables

Table 1: Measurement Equations Definitions ............................................................................................... 6

Table 2: Outlet 1 MPU Outputs
Table 3: Outlet 2 MPU Outputs
Table 4: MPU Parameters
Table 5: CE Parameters
Table 6: MPU Output Summary Chart
Table 7: MPU Input Summary Chart
Table 8: CE Input Summary Chart

................................................................................................................... 20

................................................................................................................... 25

........................................................................................................................... 29

.............................................................................................................................. 36

........................................................................................................ 40

........................................................................................................... 43

.............................................................................................................. 45

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Shunt 1

NEUTRAL

A0

A3

750

1M

1M

100nF

A2

LOAD 1

78M6613

V3P3

1

4

3

2

INLET

LINE

Shunt 2

LOAD 2

A1

750

100nF

750

100nF

1M

1M

EARTH

750

1 Introduction

This document describes the 6613_OMU_2+2S_URT_v100 firmware, which is used with the Teridian
78M6613 power and energy measurement IC. This firmware provides simple methods for calibration and
access to measurement data such as Instantaneous Power, Voltage, Current, Power Factor, and Line
Frequency. It is specifically developed for measurement of up to two single phase loads with the
following key features:

• Optimized for using current shunt resistors with analog inputs A0, A2 are configured as Voltage input

• Phase error calibration routine included for use of current transformers and/or maintaining accuracy

• Low-latency SAG status pin for sub-cycle AC fault detection.

• UART (RS232) host interface (Command Line Interface).

All measurement calculations are computed by the 78M6613 and communicated to the host processor
over a serial interface (UART0) on the TX and RX pins of the 78M6613 device. Digital IOs utilized by this
firmware include:

Figure 1 shows a simplified connection diagram of the 78M6613 (emulator connections, decoupling
capacitors and 3.3VDC power supply are omitted in this diagram).

and input A1,A3 are configured as Current inputs.

over non-ideal power factors.

Figure 1: Typical 78M6613 Connection Diagram for 6613_OMU_2+2S_URT_v100

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2 Measurement Description

2.1 Basic Measurement Equations

The Teridian 78M6613 with firmware 6613_OMU_2+2S_URT_v100 provides the user with measurement
data referred to as “Wideband” (WB). Wideband measurements are generally of interest when measuring
non-sinusoidal current/voltage, a typical condition in switched mode power supplies or similar systems.

Table 1: Measurement Equations Definitions

Symbol Parameter Wideband Equation

V RMS Voltage

I RMS Current

P Active Power
Q Reactive Power Q = √(S2 – P2)

S Apparent Power S = V * I
PF Power Factor P/S
PA Phase Angle ACOS (P/S)

V = √∑

I = √∑

P = ∑

The measurement outputs are continuously available to the user. To obtain measurement outputs, the
serial UART interface between the 78M6613 and the host processor must be set up and is described in

Section 3.

2.2 Sample Rate and Accumulation Interval

2

v(t)

2

i(t)

(i(t) * v(t))

This firmware utilizes an effective sampling rate of 3641 samples per second for each input.
The values described in section 2.1 are calculated over a period commonly referred as accumulation

interval. The registers containing the measurements are updated at the completion of every accumulation
time. The accumulation interval for this firmware is fixed at roughly 496 milliseconds.

3 Serial Communication

The serial communication with the 78M6613 takes place over a UART (RS232) interface. The default
settings for the UART of the 78M6613, as implemented in this firmware, are given below:

Baud Rate: 38400bps
Data Bits: 8
Parity: None
Stop Bits: 1
Flow Control: Xon/Xoff

The firmware allows communication through UART0 also known as CLI (Command Line Interface) mode.

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4 Command Line Interfac e

The 6613_OMU_2+2S_URT_v100 firmware implements an instruction set called the Command Line
Interface (CLI), which facilitates communication via UART between the 78M6613 and the host processor.

4.1 Identification and Information Commands

The I command is used to identify the revisions of the 6613_OMU_2+2S_URT_v100 firmware code and
the embedded CE code. The host sends the I command to the 78M6613 as follows:

>I<CR>
The 78M6613 will reply the following:
TSC 78M6613 OMU 2+2S URT V1.00, Nov 05 2010(c) 2010 Teridian Semiconductor Corp.

All Rights Reserved
CEVIVI200F0
>

4.2 Reset Commands

A soft reset of the 78M6613 can be performed by using the Z command. The soft reset restarts code
execution at addr 0000 and does not alter flash contents. To issue a soft reset to the 78M6613, the host
sends the following:

>Z<CR>
The W command acts like a hardware reset. The energy accumulators in XRAM will retain their values.

Z Reset

Description: Allows the user to cause soft resets.
Usage: Z Soft reset.

W Simulates watchdog reset.

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4.3 MPU Data Access Command

All the measurement calculations are stored in the MPU data addresses of the 78M6613. The host
requests measurement information using the MPU data access command which is a right parenthesis

)
To request information, the host sends the MPU data access command, the address (in hex) which is

requested, the format in which the data is desired (Hex or Decimal) and a carriage return. The contents
of the addresses that would be requested by the host are contained in Section 7.

4.3.1 Individual Address Read

The host can request the information in hex or decimal format. $ requests information in hex, and ?
requests information in decimal. When requesting information in decimal, the data is preceded by a + or
a -. The exception is )AB? which returns a string (see Table 3, MPU location address 0xAB).

An example of a command requesting the measured power in Watts (located at address 0x08) in decimal
is as follows:

>)08?<CR>
An example of a command requesting the measured power in Watts (located at address 0x08) in hex is

as follows:
>)08$<CR>

4.3.2 Consecutive Read

The host can request information from consecutive addresses by adding additional ? for decimal or
additional $ for hex.

An example of requests for the contents in decimal of ten consecutive addresses starting with 0x12 is:
>)12??????????<CR>
An example of requests for the contents in hex of ten consecutive addresses starting with 0x12 would be:
>)12$$$$$$$$$$<CR>
Note: The number of characters per line is limited to no more than 60.

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4.3.3 Block Reads

The block read command can also be used to read consecutive registers: )saddr:eaddr? For decimal
format or )saddr:eaddr$ for hex format where saddr is the start address and eaddr is the final address.

The following block read command requests the information contained in Table 2 in decimal format:
>)20:3D?<CR>

4.3.4 Concatenated Reads

Multiple commands can also be added on a single line. Requesting information in decimal from two
locations and the block command from above are given below:

>)12?)15?)20:3D?<CR>
Note: The number of characters per line is limited to no more than 60.

4.3.5 U Command

The U command is used for updating default values of the MPU Data permanently in the flash. Before
issuing the U command, CE must first be turned off by the disable CE command. An example of a U
command is as follows:

>)U
Additional examples of MPU Data Access commands are provided in the following table:

) MPU Data Access

Description: Allows user to read from and write to MPU data space.
Usage: ) {Starting MPU Data Address} {option}…{option}<CR>
Command

Combinations:

)saddr? <CR> Read the register in decimal.
)saddr?? <CR> Read two consecutive registers in decimal.
)saddr???<CR> Read three consecutive registers in decimal.

)saddr:eaddr?

Block read command in decimal format. Read
consecutive registers starting with starting
address saddr and ending with addres s eaddr.

Results given in decimal.
)saddr$<CR> Read the register word in h ex.
)saddr$$ <CR> Read two consecutive register words in hex.
)saddr$$$<CR> Read three consecutive register words in hex.

)saddr:eaddr$

Block read command in hex format. Read

consecutive registers starting with starting

address saddr and ending with addres s eaddr.

Results given in hex.
)saddr=n<CR> Write the value n to address saddr in hex format.
)saddr=n=m<CR> Write the values n and m to two consecutive

addresses starting at saddr in hex format.
)saddr=+n<CR> Write the value n to address saddr in decim al

format.
)saddr=+n=+m<CR> Write the values n and m to two consecutive

addresses starting at saddr in decimal format.

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)U<CR>

Updates the default values of the MPU Data

permanently in the flash.

Examples: )08$<CR> Reads data word at MPU address location 0x08

in hex format.
)08$$<CR> Reads data words at MPU address location

0x08, 0x09 in hex format.
)08$$$<CR> Reads data words at MPU address location

0x08, 0x09, 0x0A in hex format.
)28:4D$ Read data words in hex.
)08?<CR> Reads data word at MPU address location 0x08

in decimal format.
)08??<CR> Reads data words at MPU address location

0x08, 0x09 in decimal format.
)08???<CR> Reads data words at MPU address location

0x08, 0x09, 0x0A in decimal format.
)28:4D? Read data words at MPU a ddres s locatio n

starting 0x28 to 0x4D in decimal.
)04=12345678<CR> Writes 0x12345678 to MPU address location

0x04 in the hex format.
)04=12345678=9876ABCD<CR> Writes 0x12345678 to MPU address location

0x04 and 0x9876ABCD at MPU address location

0x05 in the hex format.
)04=+123<CR> Writes 123 to MPU address location 0x04 in the

decimal format.
)04=+123=-334<CR> Writes 123 to MPU address location 0x04 and

-334 to MPU address location 0x05 in the

decimal format.

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4.4 Auxiliary Commands

4.4.1 Repeat Command

The repeat command can be useful for monitoring measurements and is efficient in demands from the
host.

If the host requests line frequency, alarm status, Irms wb overcurrent event count, Vrms SAG event
count, Vrms overvoltage event count, vo lta ge, po wer, and accumulated energy measurements with the
following command string:

>)20????????<CR>
If the host then desires this same request without issuing another command, the repeat command can be

used:
>, (no carriage return needed for the repeat command)
The host only needs to send one character rather than an entire string.

Auxiliary

Description: Various
Commands: , Typing a comma (“,”) repeats the command

issued from the previous command line. This is
very helpful when examining the value at a
certain address over time, such as the CE
DRAM address for the temperature.

/ The slash (“/”) is useful to separate comments

from commands when sending macro text files
via the serial interface. All characters in a line
after the slash are ignored.

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4.5 Calibration Commands

Using the precision source method, the user provides a precision voltage and precision current load to the
device for calibration. The 6613_OMU_2+2S_URT_v100 firmware provides commands to calibrate the
measurement units. For linear current sensors, such as current shunt, no phase calibration is necessary.

There are two types of calibration commands. The first type provides complete calibration. The second
group, called atomic calibration commands, provides calibration for individual energy measurement
parameters of the IC.

4.5.1 Complete Calibration Commands (“Single Command Calibration”)

There are two calibration commands in this first group: CAL and CALW. Only one of these commands
is needed to calibrate the System/Unit.

To use these commands, a precision voltage source and a precision current source are required for the
calibration routine to use as a reference.

4.5.1.1 CAL Command

The CAL command calibrates the temperature, voltage, and current.
To calibrate channel 1, enter the following:

>CAL<CR> or CAL1<CR>
The response is:
TCal OK

VCal OK:
ICal 1 OK:
>

The device calibrates:

• The temperature (adjusts the Temperature Nominal MPU location 0xA6, saves to flash, and initiates
temperature gain compensation).

• The voltage (adjusts CAL VA and CAL VB registers and saves them to flash).

• And finally the current (adjusts CAL IA or CAL IB register and saves them to flash).

To calibrate the temperature, voltage, and current on channel 2, use the CAL2 command:
>CAL2<CR>

The response is:
TCal OK

VCal OK:
ICal 2 OK:
>

The CAL3 command calibrates both channel 1 and channel 2.

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4.5.1.2 CALW Command

The CALW command calibrates the temperature, voltage, and power (instead of the current).
To calibrate channel 1, enter the following:

>CALW<CR> or CALW1<CR>
The response is:
TCal OK

VCal OK:
WCal 1 OK:
>

To calibrate channel 2, enter the CAL2 command:
>CALW2<CR>

The response is:
TCal OK

VCal OK:
WCal 2 OK:
>

The device calibrates the temperature, the volta ge, and the power and save all values to flash.
The CALW3 command calibrates both channel 1 and channel 2.
The complete calibration commands are summarized in the following table:

Complete Calibration Commands

Description: Calibrates the IC.
Usage: CAL<channel> Calibrates temperature, then voltage,

and finally current for the given channel.
CAL1 = Calibra tes channel 1

CAL2 = Calibrates channel 2
CAL3 = Calibrates channel 1 and 2

CALW<channel> Calibrates temperature, then voltage,

and finally power for the given channel.
CALW1 = Calibrates channel 1

CALW2 = Calibrates channel 2
CALW3 = Calibrates channel 1 and 2

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4.5.2 Atomic Calibration Commands

The atomic calibration commands provide individual calibration of:

• Voltage.

• Current.

• Phase.

• Temperature.

• Power.

A sequence of these commands results in full calibration of the unit.

4.5.2.1 CLV Command

The CLV atomic calibration command calibrates voltage to the target value and tolerance and saves the
coefficients to flash. To calibrate the voltage, enter the CLV command:

>CLV<CR>
The response is:
VCal OK:

>

4.5.2.2 CLI Command

The user can then calibrate the current using the CLI command. The CLI command calibrates the current
from the specified channel to the target value and tolerance and saves the coefficients CLW. To calibrate
the current for channel 1, enter the following:

>CLI<CR> or CLI1<CR>
The response is:
ICal 1 OK:

>
The CLI2 command performs the current calibration for channel 2.
The CLI3 command performs the current calibration for both channel 1 and channel 2.

4.5.2.3 CLP Command

The user can calibrate for phase added by a current transformer by using the CLP command. The CLP1
command calibrates the phase from channel 1 to the target value and tolerance and saves the coefficient
to flash. An example of the procedure is given below.

Apply a controlled precision voltage and current signal at a set phase angle.

1. Enter target phase angle at )C3.

2. Enter phase tolerance at )BF

3. Enter phase calibration command.

>CLP<CR> or CLP1<CR>
The response is

>PCal 1 OK:
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The CLP2 command performs the phase calibration for channel 2.
The CLP3 command performs the phase calibration for both channel 1 and channel 2.

4.5.2.4 CLT Command

The CLT command is used for the temperature calibration. This command adjusts the Temperature
Nominal at MPU location 0xA6, saves to flash and initiates temperature gain compensation. The CLT
command example is given below:

>CLT<CR>
The response is:

TCal OK
>

4.5.2.5 CLW Command

The CLW command is used for the power calibration. This command adjusts the power from CLI, saves
to flash. To calibrate the power for channel 1, enter the CLW command:

>CLW<CR> or CLW1<CR>
The response is:

WCal1 OK
>

The CLW2 command performs the power calibration for channel 2.
The CLW3 command performs the power calibration for both channel 1 and channel 2.
The following table provides a summary of the atomic calibration commands:

Atomic Calibration Commands

Description: Calibrates individual sections of the IC.
Usage: CLV Calibrates voltage only.

CLI<channel> Calibrates current only for given channel.

CLI1 = Calibrates c hann el 1
CLI2 = Calibrates c hann el 2
CLI3 = Calibrates channel 1 and 2

CLP<channel> Calibrate for phase only for given channel.

CLP1 = Calibrates channel 1
CLP2 = Calibrates channel 2

CLP3 = Calibrates channel 1 and 2
CLT Calibrates temperature only.
CLW<channel> Calibrates power only for given channel.

CLW1 = Calibrate channel 1

CLW2 = Calibrate channel 2

CLW3 = Calibrate channel 1 and 2

The commands that follow are mainly for advanced users and are included for reference on ly.

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4.6 Relay Control Command

Relay control is sup porte d by the TC command. The TC command can be used to open (0) or close (1)
circuit of all 2 channels. All necessary Sequence (time between each channel), Energized (for closing
circuit), and De-Energized (for opening circuit) delay times are set up and used by the library using the
following default values:

Energized delay time = 0ms
De-Energized delay time = 0ms
Sequence delay time = 100ms

4.6.1 TC Command

The format of the TC command is as follows (where it is not a case sensitive):
>tc is the same as >TC or >Tc or >tC.
>TCxx where xx is a hex value with each bit represents the setting of each channel. The value of each bit

is determined as 1 = closing and 0 = opening 0. Both channels will be processed sequentially starting
from the highest channel number first with a sequence delay time in between. It is important to note that if
the polarity for each Channel is inverted, bit 1 of the Relay Config register (0xF0) will be set accordingly in
order for the Relay Control to work properly.

The TC commands are summarized in the following table:

TCx Relay Control Commands

Description Allows the user to control the relay of all channels in one command.
Usage

TC1 or TC01
TC2 or TC02
TC3 or TC03
TC0 or TC00

The TC command can be used to turn
on/off relay of both channels. Each bit
represents the control (1=on, 0=off) for
each channel where the LSB represents
the lowest channel number.

Examples:

Relay ON for Outlet 1, OFF all others.
Relay ON for Outlet 2, OFF all others.
Relay ON for both channels.
Relay OFF for both channels.

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4.7 CE Data Access Commands

The CE is the main signal processing unit in the 78M6613. The user wr ites to the CE data space are
mainly for calibration purposes. For the advanced user, details of CE data access commands are
described. The commands similar to the MPU access except that ] is used for the CE data access
command.

The host requests access to information from the CE data space using the CE data access command
which is a right bracket:

]
To request information, the host sends the CE data access command, the address location (in hex), the

format in which the data is desired (hex or decimal) and a carriage return. The contents of the addresses
that would be requested by the host are contained in Section 8.2.

The host can request the information in hex or decimal format. $ requests information in hex and ?
requests information in decimal.

4.7.1 Single Register CE Access

An example of a command requesting the calibration constant for current (located at address 0x08) in
decimal is as follows:

>]08?<CR>
An example of a command requesting the calibration constant for current (located at address 0x08) in hex

is as follows:
>]08$<CR>

4.7.2 Consecutive CE Reads

The host can request information from consecutive addresses by adding additional ? for decimal or
additional $ for hex.

An example of requests for the contents in decimal of ten consecutive addresses starting with 0x08 would be:
>]08??????????<CR>
An example of requests for the contents in hex of ten consecutive addresses starting with 0x08 would be:
>]08$$$$$$$$$$<CR>
Note: The number of characters per line is limited to 60 characters. Any character beyond the 60

character limit will be ignored by the CLI command interpreter.

4.7.3 CE Data Write

An example of a command writing to calibration constant for current (located at address 0x08) in decimal
is as follows:

>]08 = +16384 <CR>
An example of a command writing to calibration constant for current (located at address 0x08) in hex is as

follows:
>]08=4000 <CR>

4.7.4 U Command

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The U command is used for updating default values of the CE Data permanently in the flash. Before

issuing the U command, CE must first be turned off by the disable CE command.
An example of a U command is as follows:
>CE0

>]U
Additional examples of CE Data Access commands are provided in the following table:

] CE Data Access

Description: Allows user to read from and write to CE data space.
Usage: ] {Starting CE Data Address}{option}…{option}<CR>
Command

Combinations:

Examples: ]40$<CR> Reads CE data word at address location 0x40 in

]saddr?<CR> Read 32-bit word in decimal.
]saddr??<CR> Read two consecutive 32-bit words in decimal.
]saddr???<CR> Read three consecutive 32-bit words in decimal.
]saddr$<CR> Read 32-bit words in hex.
]saddr$$<CR> Read two consecutive 32-bit words in hex.
]saddr$$$<CR> Read thr ee consecutive 32-bit words in hex.
]U<CR> Update default version of CE Data in

FLASH. Important: The CE must be

stopped (CE0) before issuing this
command! Also, remember to restart

by executing the CE1 command prior to
attempting measurements.

the hex format.

]40$$<CR> Reads CE data word at address location 0x40

and 0x41 in the hex format.

]40$$$<CR> Reads CE data word at address location

0x40,0x41 and 0x42 in the hex format.

]40?<CR> Reads CE data word at address location 0x40 in

the decimal format.

]40??<CR> Reads CE data word at address location 0x40

and 0x41 in the decimal format.

]40???<CR> Reads CE data word at address location

0x40,0x42 and 0x43 in the decimal format.

]7E=12345678<CR> Writes 0x12345678 to CE address location 0x7E

in the hex format.

]7E=12345678=9876ABCD<CR> Writes 0x12345678 to CE address location 0x7E

and 0x9876ABCD to CE address location 0x7F
in the hex format.

]7E=+2255<CR> Writes 2255 to CE address location 0x7E in the

decimal format.

]7E=+2255=-456<CR> Writes 2255 to CE address location 0x7E and

-456 to CE address location 0x7F in the decimal
format.

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The commands that follow are included for reference only.

4.8 CE Control Comma nds

The most pertinent command is the CE enable command, CEn. It is mainly used to turn the CE on or off.
The CE is normally enabled but in order to update the CE data entry to flash, the CE must first be turned
off using the CE0 command.

4.8.1 Disable CE Command

The CE can be disabled by using the following command:
>CE0<CR>

4.8.2 Turn On CE Command

The CE can be enabled by following command:
>CE1<CR>
Additional examples of CE Control Commands are provided in the following table:

C Compute Engine Control

Description: Allows the user to enable and configure the compute engine.
Usage: C {option} {argument}<CR>
Command

Combinations:

Examples: CE0<CR> Disables the CE.

CEn<CR> Compute Engine Enable (1  Enable,

0  Disable)

CTn<CR> Select input n for TMUX output pin. Enter n in hex

notation.
CREn<CR> RTM output control (1  Enable, 0  Disable)
CRSa.b.c.d<CR> Selects CE addresses for RTM output. (maximum

of four).

CE1<CR> Enables the CE.
CT1E<CR> Selects the CE_BUSY signal for the TMUX output

pin.

Rev. 1.1 19

6613_OMU_2+2S_URT_V1_00 Firmware Desc rip tio n Doc ument UG_6613_060

(hex)

Temperature difference from 22° C.

5 MPU Measurement Outputs

This section describes the measurement outputs that can be obtained in Manual CLI Mode. Energy
outputs are accumulated numbers. The host accessing the measurement information from the 78M6613
more frequently than the accumulation interval will not result in any update in the information.

Table 2 lists the wideband measurement outputs for outlet1 and table 3 for outlet 2.

Table 2: Outlet 1 MPU Outputs

Output

Delta

Temperature

Line

Frequency

Alarm Status 22

Location

20 0.1 °C

21 0.01 Hz Line Frequency

LSB Comment Example

Definition for Status Register

Bit 0: Minimum Temperature Alarm.
Bit 1: Maximum Temperature Alarm.
Bit 2: Minimum Frequency Alarm.
Bit 3: Maximum Frequency Alarm.
Bit 4: SAG Voltage Alarm.

Bit 5: MINVA

voltage on VA input.
Bit 6: MAXVA

voltage on VA input.

Bit 7: Reserved.
Bit 8: MAXIA WB

current exceeded on outlet 1.

Bit 9: Reserved.
Bit 10: Reserved.
Bit 11: PFA negative WB - Power

Factor Negative Threshold Alarm.
Only available if )F2 bit 2 is 1.

Bit 12: PFA positive WB
Factor Positive Threshold Alarm for
outlet 1.

Bit 13: Reserved.
Bit 14: MAXIB_WB

wideband current exceeded on
Outlet 2.

Bit 15: Reserved.
Bit 16: Reserved.
Bit 17: PFB_WB negative

Wideband Power Factor Negative
Threshold Alarm for Outlet 2. Only
available if )F2 bit 2 is 1.

Bit 18: PFB_WB positive
Wideband Power Factor Positive
Threshold Alarm for Outlet 2.

Bit 19: MAXIT_WB
wideband current exceeded on both
Outlet 1 and Outlet 2.

– under minimum

– over maximum

– maximum WB

– Power

– maximum

–

–

– maximum total

If external temperature is 32 °C

)20?<CR>

Returns:

+10.0

If the line frequency is 60 Hz:

)21?<CR>

Returns:

+60.00

Alarms become “1” when

thresholds exceeded.

Note: Additional Status Alert is

Located at addr 0xBD (see Table 4)

Note: When AC voltage input is less

than or equal to 10 V

• Only MINVA alarm is active.

• All measurements are forced

to 0 except power factor,
which is forced to 1.

Note: The frequency measurement

is forced to 0 as long as the SAG

voltage alarm is active.

RMS

,

20 Rev. 1.1

UG_6613_ 060 6613_OMU_2+2S_URT_V1_00 Firmware Description Document

Bit 20: Reserved.

Bit 24 –31:

Output

Irms A
Overcurrent
Event Count

Location

(hex)

23

LSB Comment Example

Bit 21: CREEP A Alert – Creep Alert

on Outlet 1.
Bit 22: CREEP B Alert – Creep Alert
on Outlet 2.
Bit 23: Line/Neutral Reversal
detected. Only available in non­isolated mode (CESTATE, Bit 2=1)

Reserved.

Counter increments on each edge

event.

If four over current events have

occurred:

)23?<CR>

Returns: +4

Rev. 1.1 21

6613_OMU_2+2S_URT_V1_00 Firmware Desc rip tio n Doc ument UG_6613_060

+12.000

+120.000

Output

Vrms Under

Voltage

Event Count

Vrms Over

Voltage

Event Count

Vrms A 26 mV Vrms voltage

Watts A 27 mW

Wh A 28 mWh

Total Cost A 29 mUnits Cost of Wh A.

Irms A 2A mA rms current measurement.

Location

(hex)

24

25

LSB Comment Example

If four under voltage events have

Counter increments on each edge

event.

If four over voltage events have

Counter increments on each edge

event.

If the line voltage is 120 V

If 120 Watts are measured

Active power measurement (per

second).

Active accumulated energy

measurement (per hour).

If the cost is 102.536 units

occurred:

)24?<CR>

Returns: +4

occurred:

)25?<CR>

Returns: +4

)26?<CR>

Returns:

+120.000

)27?<CR>

Returns:

+120.000

If 120 Wh are measured

)28?<CR>

Returns:

+120.000

)29?<CR>

+102.536

If current measured

is 12 Amps

)2A?<CR>

Returns:

VARs A 2B mW

VAs A 2C mW

Power

Factor A

Phase

Angle A

2D

2E

–

–

Reactive power measurement (per

second).

Apparent power measurement (per

second).

Power factor. The output will be

between -0.950 and 1.000.

Positive power factor is defined as

current lagging voltage (inductive).

Negative power factor is defined as

voltage lagging current

(capacitive).

Phase angle. The output will be
between 180.000 and -180.000.

If 120 VARs

are measured

)2B?<CR>

Returns:

+120.000

If 120 VAs

are measured

)2C?<CR>

Returns:

If the power factor

is 0.95

)2D?<CR>

Returns:

+0.950

If the phase angle measured is 60

degrees

)2E?<CR>

Returns:
+60.000

22 Rev. 1.1

UG_6613_ 060 6613_OMU_2+2S_URT_V1_00 Firmware Description Document

Output

Reserved 2F

Vrms A Min 30 mV Minimum Vrms measur e d

Vrms A Max 31 mV Maximum Vrms measur e d

Watts A Min 32 mW

Watts A Max 33 mW

Irms A Min 34 mArms Minimum rms current measured.

Irms A Max 35 mArms Maximum rms current measured.

VARs A Min 36 mW

VARs A Max 37 mW

VAs A Min 38 mW

Location

(hex)

LSB Comment Example

–

Reserved

If the minimum line voltage

If the maximum line voltage

If the minimum power measured

Minimum active power measured

(per second)

If the maximum power measured

Maximum active power measured

(per second)

If the smallest current measured is

If the largest current measured is

If the largest VARs measured

Minimum reactive power measured

(per second).

If the largest VARs measured

Maximum reactive power

measured (per second).

If the smallest VAs measured

Minimum apparent power

measured (per second).

Reserved

measured was 105 V

)30<CR>

Returns:

+105.000

measured was 130 V

)31<CR>

Returns:

+130.000

is 80 Watts

)32?<CR>

Returns:
+80.000

is 200 Watts

)33?<CR>

Returns:

+200.000

1 Amp

)34?<CR>

Returns:

+1.000

30 Amps

)35?<CR>

Returns:
+30.000

is 80 VARs

)36?<CR>

Returns:
+80.000

is 300 VARs

)37?<CR>

Returns:

+300.000

is 80 VARs

)38?<CR>

Returns:
+80.000

Rev. 1.1 23

6613_OMU_2+2S_URT_V1_00 Firmware Desc rip tio n Doc ument UG_6613_060

Output

VAs A Max 39 mW

Power

Factor A Min

Power

Factor A

Max

Phase
Angle A Min

Phase

Angle A Max

Reserved 3E
Reserved 3F

Location

(hex)

3A

3B

3C

3D

LSB Comment Example

If the largest VAs measured

is 300 VARs

)39?<CR>

Returns:

+300.000

is –0.6

)3A?<CR> Returns:

-0.600

is 0.9

)3B?<CR> Returns:

+0.900

measured is 10 degrees

)3C?<CR>

Returns:
+10.000

measured is 70 degrees

)3D?<CR>

Returns:
+70.000

Reserved
Reserved

–

–

–

–

–
–

Maximum apparent power

measured (per second).

Minimum power factor measured.

Minimum is defined as the most

negative or least positive number.

Maximum power factor measured.

Maximum is defined as the most

positive or least negative number.

Minimum phase angle measured.

Maximum phase angle measured.

Reserved
Reserved

If minimum power factor measured

If maximum power factor measured

If the minimum phase angle

If the maximum phase angle

24 Rev. 1.1

UG_6613_ 060 6613_OMU_2+2S_URT_V1_00 Firmware Description Document

Temperature difference from 22° C.

Table 3: Outlet 2 MPU Outputs

Output

Delta

Temperature

Line

Frequency

Alarm Status 62

Location

(hex)

60 0.1 °C

61 0.01 Hz Line Frequency

LSB Comment Example

Definition for Status Register

Bit 0: Minimum Temperature Alarm.
Bit 1: Maximum Temperature Alarm.
Bit 2: Minimum Frequency Alarm.
Bit 3: Maximum Frequency Alarm.
Bit 4: SAG Voltage Alarm.

Bit 5: MINVA – under minimum

voltage on VA input.
Bit 6: MAXVA

voltage on VA input.

Bit 7: Reserved.
Bit 8: MAXIA WB

current exceeded on outlet 1.

Bit 9: Reserved.
Bit 10: Reserved.

Bit 11: PFA negative WB

Factor Negative Threshold Alarm.
Only available if )F2 bit 2 is 1.

Bit 12: PFA positive WB
Factor Positive Threshold Alarm for
outlet 1.

Bit 13: Reserved.
Bit 14: MAXIB_WB

wideband current exceeded on
Outlet 2.

Bit 15: Reserved.
Bit 16: Reserved.

Bit 17: PFB_WB negative –

Wideband Power Factor Negative
Threshold Alarm for Outlet 2. Only
available if )F2 bit 2 is 1.

Bit 18: PFB_WB positive
Wideband Power Factor Positive
Threshold Alarm for Outlet 2.

Bit 19: MAXIT_WB – maximum total
wideband current exceeded on both
Outlet 1 and Outlet 2.

Bit 20: Reserved.
Bit 21: CREEP A Alert – Creep Alert

on Outlet 1.
Bit 22: CREEP B Alert – Creep Alert
on Outlet 2.
Bit 23: Line/Neutral Reversal
detected. Only available in non­isolated mode (CESTATE, Bit 2=1)
Bit 24 –31: Reserved.

– over maximum

– maximum WB

– Power

– Power

– maximum

–

If external temperature is 32 °C

)60?<CR>

Returns:

+10.0

If the line frequency is 60 Hz:

)61?<CR>

Returns:

+60.00

Alarms become “1” when

thresholds exceeded.

Note: Additional Status Alert is

Located at addr 0xBD (see Table 4)

Note: When AC voltage input is less

than or equal to 10 V

• Only MI N VA alarm is active.

• All measurements are forced

to 0 except power factor,
which is forced to 1.

Note: The frequency measurement

is forced to 0 as long as the SAG

voltage alarm is active.

RMS

,

Rev. 1.1 25

6613_OMU_2+2S_URT_V1_00 Firmware Desc rip tio n Doc ument UG_6613_060

Output

Irms B
Overcurrent
Event Count

Vrms Under

Voltage

Event Count

Vrms Over

Voltage

Event Count

Vrms B 66 mV Vrms voltage

Watts B 67 mW

Wh B 68 mWh

Total Cost B 69 mUnits Cost of Wh B.

Irms B 6A mA rms current measurement.

VARs B 6B mW

VAs B 6C mW

Power

Factor B

Phase

Angle B

Location

(hex)

63

64

65

6D

6E

LSB Comment Example

If four over current events have

occurred:

)63?<CR>

Returns: +4

If four under voltage events have

occurred:

)64?<CR>

Returns: +4

If four over voltage events have

occurred:

)65?<CR>

Returns: +4

If the line voltage is 120 V

)66?<CR>

Returns:

+120.000

If 120 Watts are measured

)67?<CR>

Returns:

+120.000

If 120 Wh are measured

)68?<CR>

Returns:

+120.000

If the cost is 102.536 units

)69?<CR>

+102.536

If current measured

is 12 Amps

)6A?<CR>

Returns:
+12.000

If 120 VARs

are measured

)6B?<CR>

Returns:

+120.000

If 120 VAs

are measured

)6C?<CR>

Returns:

+120.000

If the power factor

is 0.95

)6D?<CR>

Returns:

+0.950

If the phase angle measured is 60

degrees

)6E?<CR>

Returns:
+60.000

–

–

Counter increments on each edge

event.

Counter increments on each edge

event.

Counter increments on each edge

event.

Active power measurement (per

second).

Active accumulated energy

measurement (per hour).

Reactive power measurement (per

second).

Apparent power measurement (per

second).

Power factor. The output will be

between -0.950 and 1.000.

Positive power factor is defined as

current lagging voltage (inductive).

Negative power factor is defined as

voltage lagging current

(capacitive).

Phase angle. The output will be

between 180.000 and -180.000.

26 Rev. 1.1

UG_6613_ 060 6613_OMU_2+2S_URT_V1_00 Firmware Description Document

Output

Reserved 6F

Vrms B Min 70 mV Minimum Vrms measured

Vrms B Max 71 mV Maximum Vrms measured

Watts B Min 72 mW

Watts B Max 73 mW

Irms B Min 74 mArms Minimum rms current measured.

Irms B Max 75 mArms Maximum rms current measured.

VARs B Min 76 mW

VARs B Max 77 mW

VAs B Min 78 mW

Location

(hex)

LSB Comment Example

–

Reserved

If the minimum line voltage

If the maximum line voltage

If the minimum power measured

Minimum active power measured

(per second)

If the maximum power measured

Maximum active power measured

(per second)

If the smallest current measured is

If the largest current measured is

If the largest VARs measured

Minimum reactive power measured

(per second).

If the largest VARs measured

Maximum reactive power

measured (per second).

If the smallest VAs measured

Minimum apparent power

measured (per second).

Reserved

measured was 105 V

)70<CR>

Returns:

+105.000

measured was 130 V

)71<CR>

Returns:

+130.000

is 80 Watts

)72?<CR>

Returns:
+80.000

is 200 Watts

)73?<CR>

Returns:

+200.000

1 Amp

)74?<CR>

Returns:

+1.000

30 Amps

)75?<CR>

Returns:
+30.000

is 80 VARs

)76?<CR>

Returns:
+80.000

is 300 VARs

)77?<CR>

Returns:

+300.000

is 80 VARs

)78?<CR>

Returns:
+80.000

Rev. 1.1 27

6613_OMU_2+2S_URT_V1_00 Firmware Desc rip tio n Doc ument UG_6613_060

Output

VAs B Max 79 mW

Power

Factor B Min

Power

Factor B

Max

Phase
Angle B Min

Phase

Angle B Max

Reserved 7E
Reserved 7F

Location

(hex)

7A

7B

7C

7D

LSB Comment Example

If the largest VAs measured

is 300 VARs

)79?<CR>

Returns:

+300.000

is –0.6

)7A?<CR> Returns:

-0.600

is 0.9

)7B?<CR> Returns:

+0.900

measured is 10 degrees

)7C?<CR>

Returns:
+10.000

measured is 70 degrees

)7D?<CR>

Returns:
+70.000

Reserved
Reserved

–

–

–

–

–
–

Maximum apparent power

measured (per second).

Minimum power factor measured.

Minimum is defined as the most

negative or least positive number.

Maximum power factor measured.

Maximum is defined as the most

positive or least negative number.

Minimum phase angle measured.

Maximum phase angle measured.

Reserved
Reserved

If minimum power factor measured

If maximum power factor measured

If the minimum phase angle

If the maximum phase angle

28 Rev. 1.1

UG_6613_ 060 6613_OMU_2+2S_URT_V1_00 Firmware Description Document

6 Configuration Paramet e r E ntry

6.1 MPU Parameters

Table 4 lists the MPU parameters configurable by the 6613_OMU_2+2S_URT_v100 Firmware.

Table 4: MPU Parameters

MPU

Parameter

VMAX A0 mVrms +471.500

Starting IA A1 mArms +0.007

IMAX A A2 mArms +52.000

Starting IB A3 mArms +0.007

IMAX B A4 mArms +52.000

Unused A5 – – Unused

Location

(hex)

LSB Default Comment Example

External rms voltage
corresponding to 250 mVpk at the
VA input of the 78M6613. It must
be set high enough to account for

overvoltages. Usually set to

471.500 V (471.500d).

Minimum current value to be

measured on the IA input.
Currents below this value will be
ignored. Also known as CREEP

IA.

External rms current

corresponding to 250 mVpk at the

IA input of the 78M6613.

Minimum current value to be

measured on the IB input.
Currents below this value will be
ignored. Also known as CREEP

IB.

External rms current

corresponding to 250 mVpk at the

IB input of the 78M6613.

If only using a 120V
system, the user can set
VMAX A to about 2x the

maximum voltage for added

resolution. Set VMAX A to

270V:

)A0=+270.000<CR>

Default setting is 7 mA. If

start current on channel A

desired is 10 mA:
)A1=+0.010<CR>

The default is set to 52

Amps for overhead. For
added margin, in a system
using current shunts IMAX

could be changed as

follows:

IMAX= (Vpk/√2)/R

For a 4 mΩ current shunt

IMAX=44.19 Amps

To set IMAX A:

)A2=+44.190<CR>

Default setting is 7 mA. If
start current on channel A

desired is 10 mA:
)A3=+0.010<CR>

The default is set to 52

Amps for overhead. For
added margin, in a system
using current shunts IMAX

could be changed as

follows:

IMAX= (Vpk/√2)/R

For a 4 mΩ current shunt

IMAX=44.19 Amps

To set IMAX A:

)A4=+44.190<CR>

shunt

shunt

Rev. 1.1 29

6613_OMU_2+2S_URT_V1_00 Firmware Desc rip tio n Doc ument UG_6613_060

Parameter given in relay

entered in )AE.

If the user desires 8 ms of

Parameter given in relay

entered in )AF.

If the user desires 8 ms of

MPU

Parameter

Temperature

Nominal

Reserved A7 – – Reserved

PPMC A8 ppm/°C -668 ppm per °C.

PPMC2 A9

Location

(hex)

A6 – +0

LSB Default Comment Example

ppm/°C

2

-341

Temp_raw_x reading at 22 °C.
Needed to enable temperature

compensation.

ADC temperature compensation

ppm per °C2.

Temp _raw_x is obtained

from the CE:

]71?<CR>

This value is then entered

here:

)A6=+value in decimal

Also, the command:

>CLT<CR>

Will do the same as the

steps above.

Do not change the default

setting.

Do not change the default

setting.

MPU

Parameter

Cost/kWh AA mUnits +0.150

Units of Cost AB N/A USD

Relay

Configuration

Sequence

Delay

Location

(hex)

AC – 0

AD 0.1s +0.1 Time delay between relays.

LSB Default Comment Example

Cost per kWh (kilowatt hour) in

milliunits.

4-byte string describing unit of

cost

(e.g. USD, EURO etc.). There

must be 4 characters. If entering

US dollars, USD, there needs to

be a space after the D to make it a

four character string.
Bit 1 (Relay Polarity)

0 = Normal Polarity

1 = Inverted Polarity

Bit 0 (Relay Type)

0 = non-latched

1 = latched

If the cost per kWh is to be

10 units:

)AD=+10.000<CR>

To enter US Dollars:

)AB=”USD “<CR>

To enter Euros:

)AB=”EURO”<CR>

If the user desires a 1

second delay between the

closing of the first and

second relays and also a
one second delay between
the opening of the first and

second relays, then enter

the following:

>)AD=+1<CR>

Energize

Delay

De-Energize

Delay

30 Rev. 1.1

AE ms +0.000

AF ms +0.000

manufacturer’s data sheet is
entered here. The amount of
delay will be 1 ms plus the value

manufacturer’s data sheet is
entered here. The amount of
delay will be 1 ms plus the value

delay then enter the
following:
>)AE=+0.007<CR>

delay then enter the
following:
>)AF=+0.007<CR>

UG_6613_ 060 6613_OMU_2+2S_URT_V1_00 Firmware Description Document

–

Reserved B0 - BC – 0 Reserved Reserved

Bit 0 – Reserved.

Additional

Status

Unused BE

Tolerance on

Phase

Reserved C0 – 0 Reserved Reserved

Calibration

Voltage

BD – 1

BF

C1 mVrms +120.000

0.001°

0.100°

Bit 1 – WPULSE Disable.

Bit 2 – VCal Failure.
Bit 3 – ICal1 Failure.

Bit 4 – WCal1 Failure.

Measured value to fall within this

set tolerance of the target value

(Calibration Current entry) for the

calibration to be complete.

Target line voltage (rms) used for

calibration.

If the tolerance to the target
phase is desired to be more

coarse, to within 0.5°, the

user can enter the

>)BF=+0.500<CR>

If the target line voltage for

calibration is 220V, enter

>)C1=+220<CR>

following:

the following:

MPU

Parameter

Calibration

Current

Calibration

Phase

Tolerance on

Voltage

Tolerance on

Current

Average

Count for

Voltage

Average

Count for

Current

Location

(hex)

C2 mArms +1.000

C3 0.1° +0

C4 mVrms +0.010

C5 mArms +0.010

C6 1 +3

C7 1 +3

LSB Default Comment Example

Target load current (rms) used for

calibration.

Target Phase (voltage to current).

Normally set to zero.

Measured value to fall within this

set tolerance of the target value

(Calibration Voltage entry) for the

calibration to be complete.

Measured value to fall within this

set tolerance of the target value

(Calibration Current entry) for the

calibration to be complete.

Number of voltage measurements

taken and averaged to be

compared to the target value

(Calibration Voltage entry).

Number of current measurements

taken and averaged to be

compared to the target value

(Calibration Current entry).

If the target load current for

calibration is 2A, enter the

following:

>)C2=+2<CR>

If the tolerance to the target

voltage is desired to be

more coarse, to within

0.1V, the user can enter the
following:

>)C4=+0.100<CR>

If the tolerance to the target

current is desired to be

more coarse, to within

0.1A, the user can enter the
following:

>)C5=+0.100<CR>

If the amount of averaging

for the voltage

measurement is desired to

increase to 10 enter the

following:

>)C6=+10<CR>

If the amount of averaging

for the current

measurement is desired to

increase to 10 enter the

following:

>)C7=+10<CR>

Rev. 1.1 31

6613_OMU_2+2S_URT_V1_00 Firmware Desc rip tio n Doc ument UG_6613_060

If maximum number of

iterations to be tried for

obtaining the target value of

voltage within the set

tolerance (at C4) is to be

reduced to 5, then enter:

>)C8=+5<CR>

If maximum number of

iterations to be tried for

obtaining the target value of

power within the set

tolerance (at C5) is to be

reduced to 5, then enter:

>)C9=+5<CR>

Max Iteration

for Voltage

Max Iteration

for Current

C8 1 +10

C9 1 +10

Number of attempts to reach the
target value (Calibration Voltage

entry) within the programmed

tolerance.

Number of attempts to reach the
target value (Calibration Voltage

entry) within the programmed

tolerance.

32 Rev. 1.1

UG_6613_ 060 6613_OMU_2+2S_URT_V1_00 Firmware Description Document

MPU

Parameter

Tolerance on

Watts

Average

Count for

Watts

Max Iteration

for Watts

Calibration

WRATE

Calibration

Temperature

Calibration

Watts

Temp Alarm

Min Threshold

Temp Alarm

Max

Threshold

Location

(hex)

CA mW +0.010

CB 1 +3

CC 1 +10

CD 1 +6350

CE

CF mW 120.000 Target Watts used for calibration.

D0 0.1°C +0.0°C

D1 0.1°C +70°C

LSB Default Comment Example

Measured value to fall within this

set tolerance of the target value
(Calibration Voltage multiplie d by
the calibration current entries) for

the calibration to be complete.

Measured value to fall within this

set tolerance of the target value
(Calibration Voltage multiplie d by
the calibration current entries) for

the calibration to be complete.

Number of attempts to reach the
target value (Calibration Voltage

multiplied by the calibration

current entries) within the

programmed tolerance.

Entry for WRATE during the

calibration step only. After

calibration, WRATE returns to the

value entered in ]0F.

0.1°C

+22.0

Target nominal temperature for

calibration.

Minimum Temperature Alarm

Threshold. A temperature below

this threshold will set the alarm

(bit 0 of the Alarm Status

Register).

Maximum Temperature Alarm

Threshold. A temperature above

this threshold will set the alarm

(bit 1 of the Alarm Status

Register).

If the tolerance to the target
power is desired to be more

coarse, to within 0.1W, the

user can enter the

following:

>)CA=+0.100<CR>

If the amount of averaging

for the power measurement

is desired to increase to 10

enter the following:

>)CB=+10<CR>

If maximum number of

iterations to be tried for

obtaining the target value of

power within the set

tolerance (at CA) is to be

reduced to 5, then enter:

>)CC=+5<CR>

If the user desires the

target nominal temperature

to be 25°C, then set as

follows:

>)CE=+25.0<CR>

If the target Watts for

calibration is 240, enter the

following:

>)CF=+240.000<CR>

If the minimum temperature
threshold is to be change to

10°C then set as follows:

>)D0=+10.0

If the maximum

temperature threshold is to

be change to 50°C then set

as follows:

>)D1=+50.0

Rev. 1.1 33

6613_OMU_2+2S_URT_V1_00 Firmware Desc rip tio n Doc ument UG_6613_060

MPU

Parameter

Frequency

Minimum

Threshold

Frequency

Maximum
Threshold

SAG Voltage

Alarm

Threshold

Min Voltage

Alarm

Threshold

Peak Voltage

Alarm

Threshold

Unused D7-D8 –

Peak IA

Alarm

Threshold

Location

(hex)

D2 0.01Hz +59.00

D3 0.01Hz +61.00

D4 mVpk +80.0

D5 mVrms +100.000

D6 mVrms +140.000

D9 mArms +15.000

LSB Default Comment Example

Minimum Frequency Alarm

Threshold. A frequency below

this threshold will set the alarm

(bit 2 of the Alarm Status

Register).

Maximum Frequency Alarm

Threshold. A frequency above

this threshold will set the alarm

(bit 3 of the Alarm Status

Register).

Sets an alarm (bit 4 of the Alarm

Status Register) if voltage drops

below the SAG threshold.

Minimum voltage level selected to

flag user (bit 5 of the Alarm Status

Register).

Peak voltage setting that user

wishes to flag (bit 6 of the Alarm

Status Register).

Maximum Current measured on

the IA channel above which a flag

must set (bit 8 of the Alarm Status

Register).

If the minimum frequency

threshold is to be changed

to 59.50 Hz then enter the

following:

>)D2=+59.50

If the maximum frequency

threshold is to be changed

to 60.50 Hz then enter the

following:

>)D2=+60.50

To change the minimum
voltage threshold from the
40 Volt default to 80 Volts:

)D5=+80.000<CR>

To change the peak voltage

threshold from the default

407.3 Volts to 280 Volts:
)D6=+280.000<CR>

If the peak current
threshold is to be changed
from the default value of 15

Amps to 30 Amps then set

as follows:

)D9=+30.000<CR>

34 Rev. 1.1

UG_6613_ 060 6613_OMU_2+2S_URT_V1_00 Firmware Description Document

MPU

Parameter

Unused DA - DB –

PFA_ Neg
Threshold

PFA_ Pos

Threshold

Unused DE - DF – – Unused
Unused E0 - E5 – – Unused

Alarm

Mask_Reg

Alarm

Mask_DIO

RESERVED E8-EF – –

Control Relay F0

Min/Max

Control

Clear Control

and Power

Factor Polarity

Location

(hex)

DC – -0.700

DD – +0.700

E6

E7 – 00201FFF

F1

F2 – 0

LSB Default Comment Example

–

–

–

00201FFF

Power Factor Negative Threshold.

A less negative power factor than

this threshold will set an alarm (bit

11 of the Alarm Status Register).

Only available if )F2 bit 2 is set to

1.

Power Factor Positive Threshold.

A positive power factor less than

this threshold will set an alarm (bit

12 of the Alarm Status Register).

Alarm mask for bits in the Alarm

Status register. A “0” masks the

alarm from the register bit.

Alarm mask for an alarm pin

(DIO20). A “0” masks the alarm

from DIO20

RESERVED

Bit 1 (Relay for Outlet 2)

0 = DIO19 = 0

1 = DIO19 =1

0

0

Bit 0 (Relay for Outlet 1)

0 = DIO7 = 0
1 = DIO7 = 1

Note: AC[1] = 1 inverts the bits

above.

BIT1 – 1 Start/Stop MIN/MAX
recording.

1 = Start
0 = Stop
BIT0 – 1 Reset MIN/MAX

registers before recording. Bit
autoclears.

Clear Control and Power Factor
Polarity Register:

Bit 2 – Power Factor Polarity
0 = Power Factor is

positive only. Negative alarm
thresholds and alarms are not
enabled.

1 = Power factor can be
positive or negative.

Bit1 – Clears Counts
Bit 0 – Clears Accumulators.

If the negative power factor
threshold is to be changed

from the default to -0.6 then

set as follows:

)DC=-0.600<CR>

If the positive power factor

threshold is to be changed

from the default to +0.6

then set as follows:

)DD=+0.600<CR>

If bits 0 and 1 are to be

masked then set as follows:

>)E6=00801FFC

Alarm mask for an alarm

pin (DIO20). A “0” masks

the alarm from DIO20

Control Relay

Reset & Start MIN/MAX

recording.

)F1=3<CR>

Stop MIN/MAX recording

)AC=00<CR>

Rev. 1.1 35

6613_OMU_2+2S_URT_V1_00 Firmware Desc rip tio n Doc ument UG_6613_060

6.2 CE Parameters

Table 5 lists the CE parameters configurable by the 6613_OMU_2+2S_URT_v100 Firmware. The user
does not need to alter any of these parameters.

Table 5: CE Parameters

CE

Parameter

CAL IA 08

CAL IB 09

CAL VA 0A

CAL VB 0B

PHASE_

ADJ_IA

PHASE_

ADJ_IB

Location

(hex)

0C

0D

LSB Default Comment Example

If current on channel A is low by 1%

16384 is

the default

and is a

gain of 1.

32767 is

max giving

a gain of

2.

16384 is

the default

and is a

gain of 1.

32767 is

max giving

a gain of

2.

16384 is

the default

and is a

gain of 1.

32767 is

max giving

a gain of

2.

16384 is

the default

and is a

gain of 1.

32767 is

max giving

a gain of

2.

-16384 ≤
PHASE_A
DJ_IA ≤
+16384

-16384 ≤
PHASE_A
DJ_IB ≤
+16384

+13873

+13873

+16384

+16384

0

0

Gain constant for IA

input.

Gain constant for IB

input.

Gain constant for

VA input.

Gain constant for

VB input.

Phase adjustment

=15 *

PHASE_ADJ_IA *

-14

(degrees)

2

Phase adjustment

=15 *

PHASE_ADJ_IB *

-14

(degrees)

2

scale the nominal number, 16384 by

1/(1-0.01). Number to be entered would

be 16549:

]08=+16549<CR>

If current on channel A is high by 1%
scale the nominal number, 16384 by

1/(1+0.01). Number to be entered would

be 16222:

]08=+16222<CR>

If current on channel B is low by 1%

scale the nominal number, 16384 by

1/(1-0.01). Number to be entered would

be 16549:

]08=+16549<CR>
If current on channel B is hig h by 1%
scale the nominal number, 16384 by

1/(1+0.01). Number to be entered would

be 16222:

]08=+16222<CR>

If voltage on channel A is low by 1%

scale the nominal number, 16384 by

1/(1-0.01). Number to be entered would

be 16549:

]0A=+16549<CR>

If current on channel A is high by 1%
scale the nominal number, 16384 by

1/(1+0.01). Number to be entered would

be 16222:

]0A=+16222<CR>

If voltage on channel B is low by 1%

scale the nominal number, 16384 by

1/(1-0.01). Number to be entered would

be 16549:

]0A=+16549<CR>

If current on channel B is hig h by 1%
scale the nominal number, 16384 by

1/(1+0.01). Number to be entered would

be 16222:

]0A=+16222<CR>

No adjustment should be necessary

when using current shunts.

No adjustment should be necessary

when using current shunts.

36 Rev. 1.1

UG_6613_ 060 6613_OMU_2+2S_URT_V1_00 Firmware Description Document

CE

Parameter

CESTATE 0E 5005h

Location

(hex)

LSB Default Comment Example

SAG CNT

Bits 15:8 –

determines the

consecutive voltage

samples below

SAG_Threshold
before a sag alarm
is declared. 255 is

the maximum

value.

Current Sensor

Configuration

Bit 7

0 use IA for current

1 use I0 - I1for

current.

Dual Voltage

Bit 6

1-VB is separate

from VA.

0 – Single voltage

input

Reserved

Bit 5

Pulse Selection

(PULSEL)

Bit 4

0 – chooses Outlet

1 (IA input) for

pulse generation

1 – chooses Outlet

2 (IB input) for

pulse generation.

Reserved

Bit 3

Voltage Sensor

Configuration

Bit 2

0 – Isolated mode

uses VA-VB for

Voltage

1 – Non-isolated

mode uses VA for

voltage; V3P3 must

be tied to NTRL; VB

can be tied to

EGND for reversal

detection

Pulse gain factor

Bits 1 an d 0

00 – 6x

01 – (6/64)x

10 – 96x

11 – 1.5x

Selects at least 80 (50h) consecutive

voltage samples below SAG_Threshold

Selects Pulse Gain Factor equal to 6/64

]0E=5001

before SAG alarm.

(1h)

Rev. 1.1 37

6613_OMU_2+2S_URT_V1_00 Firmware Desc rip tio n Doc ument UG_6613_060

CE

Parameter

WRATE 0F

Reserved 10 Reserved

SAG

Threshold

QUANTA 12

QUANTB 13

QUANT

VAR A

Location

(hex)

11

14

LSB Default Comment Example

Kh =

VMAX A *

IMAX A /

(WRATE *

X)

1.6826E+0
1 WattSec

VMAX A

*4.2551E-

07 (Vpk)

VMAX A *

IMAX A *

1.8541E-

10 (Watt)

VMAX A *

IMAX B *

1.8541E-

10 (Watt)

VMAX A *

IMAX A *

1.8541E­10 (Watt)

+4860

+168225

0

0

0

Controls the

number of pulses

that are generated

per measured Wh

and VARh

measurements.

The voltage

threshold for SAG

warnings. The

default value is 80

Vpk if VMAX = 600

V.

Compensation
added to the Watt
calculation. Used

for compensation at

low current levels.

Keep below

10000d.

Compensation
added to the Watt

calculation for

Outlet 2. Used for

compensation at

low current levels.

Keep below

10000d.

Compensation
added to the VAR

calculation for

Outlet 1. Used for

compensation at

low current levels.

Keep below

10000d.

Kh = 0.32 * Wh / pulse with X = 6/64,

]0F=+4860

VMAX =600 V

IMAX = 52 A

]11=+313350

80 Vpk SAG Threshold.

and

Compensation
added to the VAR

QUANT

VAR B

15

VMAX A *

IMAX B *

1.8541E-10
(Watt)

0

calculation for

Outlet 2. Used for

compensation at

low current levels.

Keep below

10000d.

38 Rev. 1.1

UG_6613_ 060 6613_OMU_2+2S_URT_V1_00 Firmware Description Document

CE

Parameter

QUANT IA 16

QUANT IB 17

Reserved 18 – – Reserved

Location

(hex)

LSB Default Comment Example

IA input

compensation

added for input

noise and

truncation in the

squaring calculation

2

. Used for

for I

(A

2

*

2

)

(IMAX A)

4.6351E-11

0

compensation at

low current levels.

Keep below

10000d.

IA input

compensation

added for input

noise and

truncation in the

squaring calculation

2

. Used for

for I

(A

2

*

2

)

(IMAX B)

4.6351E-11

0

compensation at

low current levels.

Keep below

10000d.

Reserved

Gain Adjust 19

16384 is

the default

and is a

gain of 1.

+16384

32767 is max giving

a

gain of 2.

Reserved 1A-1B – – Reserved

To increase all channels equally by 1%

scale the nominal number, 16384 by

1/(1-0.01). Number to be entered would

be 16549:

]19=+16549<CR>

To decrease all channels 1% scale the
nominal number, 16384 by 1/(1+0.01).

Number to be entered would be 16222:

]19=+16222<CR>

Reserved

Rev. 1.1 39

6613_OMU_2+2S_URT_V1_00 Firmware Desc rip tio n Doc ument UG_6613_060

7 Address Content Summary

If the color shading is the same, the information in the table cells is the same between narrowband and
wideband measurements. Note that Outlet 1 = channel A and Outlet 2 = channel B.

Table 6: MPU Output Summary Chart

Outlet 1 Address Wideband

Common Data 20 Delta Temp

21 Line Frequency
22 Alarm Status
23 Over Current Event Count
24 Under Voltage Event Count
25 Over Voltage Event Count
26 Volts

Common, Outlet 1
Specific Data

Tier 1, Outlet 1 Specific
Data

Tier 2, Outlet 1 Specific
Min/Max Data

27 Watts (A)
28 Energy (A)

29 Cost (A)
2A Current (A)
2B VAR (A)
2C VA (A)
2D Power Factor (A)
2E Phase (A)
2F (Reserved for Future)

30 Vrms Min

31 Vrms Max

32 Watts Min (A)

33 Watts Max (A)

34 Current Min (A)

35 Current Max (A)

36 VAR Min (A)

37 VAR Max (A)

38 VA Min (A)

39 VA Max (A)
3A Power Factor Min (A)
3B Power Factor Max (A)
3C Phase Min (A)
3D Phase Max(A)
3E (Reserved for Future)
3F (Reserved for Future)

40 Rev. 1.1

UG_6613_ 060 6613_OMU_2+2S_URT_V1_00 Firmware Description Document

Outlet 2 Address Wideband

Common Data 60 Delta Temp

61 Frequency

62 Alarm Status

63 Over Current Event Count

64 Voltage SAG Event Count

65 Over Voltage Event Count

66 Volts

Common, Outlet 2
Specific Data

Tier 1, Outlet 2 Specific
Data

Tier 2, Outlet 2 Specific
Max/Min Data

67 Watts (B)

68 Energy (B)

69 Cost (B)
6A Current (B)
6B VAR (B)
6C VA (B)
6D Power Factor (B)
6E Phase (B)
6F (Reserved for Future)

70 Vrms Min

71 Vrms Max

72 Watts Min (B)

73 Watts Max (B)

74 Current Min (B)

75 Current Max (B)

76 VAR Min (B)

77 VAR Max (B)

78 VA Min (B)

79 VA Max (B)
7A Power Factor Min (B)
7B Power Factor Max (B)
7C Phase Min (B)
7D Phase Max (B)
7E (Reserved for Future)
7F (Reserved for Future)

Rev. 1.1 41

6613_OMU_2+2S_URT_V1_00 Firmware Desc rip tio n Doc ument UG_6613_060

Totals of Multiple

Outlets

Common Total Data 90 Total Watts

Bandwidth Specific
Totals

Common Total Max/Min
Data

Bandwidth Specific
Total Max/Min Data

Address Wideband

91 Total Energy

92 Total Cost

93 Total Current

94 Total VARs

95 Total VA's

96 Total Over Current Count

97 (Reserved for Future)

98 Total Watts Min

99 Total Watts Max
9A
9B Total Current Max
9C Total VAR Min
9D Total VAR Max
9E Total VA Min
9F Total VA Max

Total Current Min

42 Rev. 1.1

UG_6613_ 060 6613_OMU_2+2S_URT_V1_00 Firmware Description Document

Table 7: MPU Input Summary Chart

Voltage

Current - Outlet 1

Current - Outlet 2

Unused

Temperature

Cost

Relay Configuration

Misc. Config

Unused

Quick Calibration Parameters

Temperature

Frequency

A0
A1
A2 Imax (A) - Outlet1
A3
A4 Imax (B) - Outlet2
A5 Unused
A6
A7 Reserved
A8 PPMC
A9 PPMC2
AA
AB Cost Unit s tring
AC
AD Sequence Delay
AE Energize Delay
AF Denergize Delay

B0 -BC Unused

BD
BE Unused
BF Tolerance on Phase Calibration
C0
C1 Calibration Voltage (Target)
C2 Calibration Current (Target)
C3 Calibration Phase
C4 Tolerance on Voltage Calibration
C5 Tolerance on Current Calibration
C6 Average Count for Voltage
C7 Average Count for Current
C8 Max Iterations for Voltage
C9 Max Iterations for Current
CA Tolerance on Watts Calibration

CB Average Count for Watts
CC Max Iterations for Watts
CD Calibration WRATE

CE Calibration Temperature

CF Calibration Watts (Target)

D0

D1 Max Temperature Alarm Threshold

D2

D3 Max Frequency Alarm Threshold

Vmax
Imin (Creep A) - Outlet1

Imin (Creep B) - Outlet2

TEMPERATURE NOMINAL

Cost per KWh

Polarity, Latch type

Configuration

Calibration Type

Min Temperature Alarm Threshold

Min Frequency Alarm Threshold

Rev. 1.1 43

6613_OMU_2+2S_URT_V1_00 Firmware Desc rip tio n Doc ument UG_6613_060

Voltage

Unused

Current - Outlet 1

Power Factor - Outlet 1

Current - Outlet 2

Power Factor - Outlet 2

Total Current

Alarm Mask for Status Regs

Alarm Mask for Alarm DI/O

Relay Controls

Min/Max Controls

Clear Control

D4

D5 Min Voltage Alarm Threshold

D6 Max Voltage Alarm Threshold

D7 Unused

D8

D9 Max Current Alarm Threshold (WB)

DA

DB Reserved
DC Power Factor Alarm - Threshold (WB)
DD Power Factor Alarm + Threshold (WB)

DE

DF Max Current Alarm Threshold (WB)

E0

E1 Reserved

E2 Power Factor Alarm - Threshold (WB)

E3 Power Factor Alarm + Threshold (WB)

E4

E5 Max Current Alarm Threshold (WB)

E6

E7

F0

F1

F2

SAG Voltage Alarm Threshold

Reserved

Reserved

Reserved

Reserved

Reserved

Alarm Mask for Status
Alarm Mask for Alarm DIO
Relay On/Off Control
Min/Max Controls
Accumulator and Counter Clear. Power Factor Polarity

44 Rev. 1.1

UG_6613_ 060 6613_OMU_2+2S_URT_V1_00 Firmware Description Document

Table 8: CE Input Summary Chart

Calibration

Phase Compensation

CE Configuration

Pulse Rate

SAG Threshold

Quantization Corrections

Gain Adjust

8 Contact Information

08

09 Calibration Gain IB
0A Calibration Gain VA
0B Calibration Gain VB
0C
0D Phase Adjust IB
0E
0F

10 Reserved

11

12

13 Quantization offset Watts B

14 Quantization offset VAR A

15 Quantization offset VAR B

16 Quantization offset IA

17 Quantization offset IB

18 Reserved

19

Calibration Gain IA

Phase Adjust IA

CE State
WRATE

SAG Threshold
Quantization offset Watts A

Temperature Gain Adjust

For more information about Maxim products or to check the availability of the 78M6613, contact technical
support at www.maxim-ic.com/support.

Rev. 1.1 45

6613_OMU_2+2S_URT_V1_00 Firmware Desc rip tio n Doc ument UG_6613_060

Document Revision His t ory

Version Date History

1.0 1/14/2011 First publication.

1.1 11/9/2011 Changed the CESTATE parameter default from 5001h to 5005h.

46 Rev. 1.1