1. Manuals
  2. Brands
  3. Power Measurement Manuals
  4. Measuring Instruments
  5. 3710 ACM
  6. Manual

Power Measurement 3710 ACM Manual

Advanced digital power instrumentation package
Hide thumbs
Table of Contents

Advertisement

Quick Links

Download this manual
 $&0
$GYDQFHG 'LJLWDO 3RZHU
,QVWUXPHQWDWLRQ 3DFNDJH
 $&0  $OOHQ%UDGOH\
6HULDO &RPPXQLFDWLRQV 3URWRFRO
9HUVLRQ 
&217(176

Advertisement

Table of Contents
loading
Need help?

Need help?

Do you have a question about the 3710 ACM and is the answer not in the manual?

Questions and answers

Subscribe to Our Youtube Channel

Related Manuals for Power Measurement 3710 ACM

Summary of Contents for Power Measurement 3710 ACM

  • Page 1  $&0 $GYDQFHG 'LJLWDO 3RZHU ,QVWUXPHQWDWLRQ 3DFNDJH  $&0  $OOHQ%UDGOH\ 6HULDO &RPPXQLFDWLRQV 3URWRFRO 9HUVLRQ  &217(176...
  • Page 2 Ah‘)Ã"!!&!($'% those set forth or identified above. Asia & Pacific 3710 ACM is a trademark of Power Measurement Ltd. DF1 is a trademark of Allen- Bradley Company. Other brands and their products are trademarks of their respective QPX@SÃH@6TVS@H@IUÃ6VTUS6GD6 holders and should be noted as such.
  • Page 3 Jim M. Bilach Systems Engineer Ver. 1.0 : December 19, 1989 Ver. 2.0 : March 08, 1990 Ver. 3.0 : November 26, 1990...
  • Page 4 - 3 -...

  • Page 5: Table Of Contents

    PACKET COMMUNICATIONS WITH THE MODEL 3710 ACM 3.1 - 3710 ACM Set-up Packets 3.2 - 3710 ACM Data Packets 3.3 - 3710 ACM Log Packets 3.4 - 3710 ACM Control Packets LIST OF THE 3710 ACM PACKET COMMAND TYPES - 4 -...
  • Page 6 - 5 -...
  • Page 7 - 6 -...

  • Page 8: Introduction

    1.0 - INTRODUCTION This document details the serial communications protocol used to pass commands, information and data between the model 3710 ACM Power Meter and the Allen-Bradley line of programmable logic controllers (PLC) and communication interface products. This document provides the information necessary for a 3rd party OEM to develop in-house software to communicate with the model 3710 ACM Power Meter.

  • Page 9: Communications Protocol Revisions

    1.2 - COMMUNICATIONS PROTOCOL REVISIONS This section details the changes made to each new version of the Serial Communications Protocol Document. Ver. 1.0 - Initial draft of the Serial Communications Protocol Document (Released 89/12/19). Ver. 2.0 - Corrected delta mode line-to-line average voltage from incorrect line-to-neutral average voltage readings in Short Real-Time Data Packet.

  • Page 10: Detailed Description Of The Communications Protocol

    This protocol uses a command / reply message packet format in which the Allen-Bradley PLC transmits a command type packet to the 3710 ACM Power Meter and the 3710 ACM answers the PLC with a reply type packet. This protocol uses two of the Allen-Bradley Message Packet Formats from the PLC-2 or Basic Command Set: Unprotected Read and Unprotected Write.

  • Page 11: Hardware Configuration

    2.2 - HARDWARE CONFIGURATION The following section describes the hardware configuration required to connect a single 3710 ACM Power Meter or up to 32 3710 ACM Power Meters to a single Allen-Bradley PLC through several different Allen-Bradley Communications Interface Modules.

  • Page 12: Description Of The Packet Structure

    Allen-Bradley Communication Interface and the 3710 ACM Power Meter only. THE DESTINATION ADDRESS (DST) SUB-FIELD (1 Byte) This byte contains the address of the device (PLC or Communication Interface connected to the 3710 ACM) that the packet is being sent - 11 -...
  • Page 13 THE SOURCE ADDRESS (SRC) SUB-FIELD (1 Byte) This byte contains the address of the device (PLC or Communication Interface connected 3710 ACM) from which packet originated. - 12 -...
  • Page 14 3710 while Unprotected Write delivers data to the 3710 ACM. The commands are only sent from the PLC and the replies are only sent from the 3710 ACM. THE STATUS SUB-FIELD (1 Byte) This byte indicates the status of the message transmission.
  • Page 15 Bradley PLC and the 3710 ACM Power Meter. Packet Data Structure In general, most data values sent to and from a model 3710 ACM consist of a 4 byte value. Each 4 byte value can be treated as two WORDS, a LOW ORDER WORD and a HIGH ORDER WORD.
  • Page 16 3710 ACM. The low order byte contain the even valued 3710 ACM unit address or unit id in which the PLC can uniquely identify the meter. These two bytes form the Message Type Address found later in this document.
  • Page 17 Data Link Escape (DLE) SUB-FIELD and the End of Text (ETX) SUB-FIELD. These two bytes are used by the Data Link Layer of Allen-Bradley Communication Interface and the 3710 ACM Power Meter only. THE DATA LINK ESCAPE (DLE) SUB-FIELD (1 Byte) This sub-field contains a single byte control character used to indicate the end of a message packet.

  • Page 18: Broadcast Packets

    is equivalent to the Block Check Character (BCC) used by Allen-Bradley Communication Products. 2.4 - BROADCAST PACKETS Provisions have been made for the use of broadcast commands within the RS-485 data transfer protocol. The purpose of this is to allow all Slave devices to receive the same command from the Master station.

  • Page 19: 3710 Acm Timing Considerations

    2.6 - 3710 ACM TIMING CONSIDERATIONS The 3710 ACM requires a 100 millisecond dead space between the end of any response packet on the RS-485 loop and the start of a new command packet sent by the Master PLC. Sequential transmissions from the Master PLC to the 3710 ACM meters must be 100 milliseconds apart (ie: 100 millisecond dead space).

  • Page 20: Packet Communications With The Model 3710 Acm

    3710 ACM Power Meter. Command packets sent to the 3710 ACM from the Allen-Bradley PLC and reply packets sent from the PLC to the 3710 ACM are divided into three categories according to their function: The packets listed in the first category are used to configure and set-up the 3710 ACM Power Meter prior to operation.
  • Page 21 Manual description on the set-up parameters). i) Read 3710 ACM Set-Up Data (Message Type Address 01XXH). This packet is issued to a model 3710 ACM Power Meter to request a packet containing the present set-up parameters. Byte 1 = 10H = Data Link Escape (DLE) control byte.
  • Page 22 3710 ACM Response to Read Set-Up Data. Byte 1 = 10H = Data Link Escape (DLE) control byte. Byte 2 = 02H = Start of Text (STX) delimiter byte. Byte 3 = (DST) - destination address byte of message packet.
  • Page 23 3710 ACM Response to Read Set-Up Data (continued). Byte 41,42 = I Out range. Byte 43,44 = I Out key. Byte 45,46 = low order word, I Out scale. Byte 47,48 = high order word, I Out scale. Byte 49,50 = standard frequency.
  • Page 24 Byte 13,14 = low order word, volt scale. Byte 15,16 = high order word, volt scale. Byte 17,18 = new 3710 ACM unit id ( 2 - 254 [even address] ). Byte 19,20 = amp scale. Byte 21,22 = baudrate = 1 for 110 BAUD.
  • Page 25 Writing 3710 ACM Set-Up Data (Message Type Address 01XXH) (continued). Byte 37,38 = I Out range. Byte 39,40 = I Out key. Byte 41,42 = low order word, I Out scale. Byte 43,44 = high order word, I Out scale.
  • Page 26 Byte 10 = 03H = End of Text (ETX) delimiter byte. Byte 11 = BCC ERROR CHECK. 3.1.2 - TO READ OR SET THE 3710 ACM DATE AND TIME PARAMETERS. These packets are used to read or set-up the date & time used by the 3710 ACM Power Meter.
  • Page 27 3710 ACM Response to Read Time. Byte 1 = 10H = Data Link Escape (DLE) control byte. Byte 2 = 02H = Start of Text (STX) delimiter byte. Byte 3 = (DST) - destination address byte of message packet.
  • Page 28 Set 3710 ACM Time (Message Type Address 02XXH). This packet is issued to a model 3710 ACM Power Meter to set the present time used by the 3710. Byte 1 = 10H = Data Link Escape (DLE) control byte.
  • Page 29 3710 ACM Response to Set Time. Byte 1 = 10H = Data Link Escape (DLE) control byte. Byte 2 = 02H = Start of Text (STX) delimiter byte. Byte 3 = (DST) - destination address byte of message packet.
  • Page 30 Read 3710 ACM Setpoints (Message Type Address 08XXH). (Setpoints 1 to 8). This packet is issued to a model 3710 ACM Power Meter to retrieve the first 8 setpoint parameters used to control the relays associated with the meter.
  • Page 31 3710 ACM Response to Read Setpoints (Setpoints 1 to 8). Byte 1 = 10H = Data Link Escape (DLE) control byte. Byte 2 = 02H = Start of Text (STX) delimiter byte. Byte 3 = (DST) - destination address byte of message packet.
  • Page 32 Read 3710 ACM Setpoints (Message Type Address 09XXH). (Setpoints 9 to 17). This packet is issued to a model 3710 ACM Power Meter to retrieve the last 9 setpoint parameters used to control the relays associated with the meter.
  • Page 33 3710 ACM Response to Read Setpoints (Setpoints 9 to 17). Byte 1 = 10H = Data Link Escape (DLE) control byte. Byte 2 = 02H = Start of Text (STX) delimiter byte. Byte 3 = (DST) - destination address byte of message packet.
  • Page 34 Set 3710 ACM Setpoints (Message Type Address 08XXH). (Setpoints 1 to 8). This packet is issued to a model 3710 ACM Power Meter to set the first 8 setpoint parameters in the meter. This packet sets Setpoint #1 through Setpoint #8.
  • Page 35 Byte 143 = BCC ERROR CHECK. vi) 3710 ACM Response to Set Setpoints (Setpoints 1 to 8). Byte 1 = 10H = Data Link Escape (DLE) control byte. Byte 2 = 02H = Start of Text (STX) delimiter byte. Byte 3 = (DST) - destination address byte of message packet.
  • Page 36 Set 3710 ACM Setpoints (Message Type Address 09XXH). (Setpoints 9 to 17). This packet is issued to a model 3710 ACM Power Meter to set the last 9 setpoint parameters in the meter. This packet sets Setpoint #9 through Setpoint #17.
  • Page 37 Byte 158 = 03H = End of Text (ETX) delimiter byte. Byte 159 = BCC ERROR CHECK. viii) 3710 ACM Response to Set Setpoints (Setpoints 9 to 17). Byte 1 = 10H = Data Link Escape (DLE) control byte. Byte 2 = 02H = Start of Text (STX) delimiter byte.
  • Page 38 3710 ACM Power Meter. i) Read 3710 ACM Short Real-Time Data (Message Type 03XXH). This packet is issued to a model 3710 ACM Power Meter to retrieve a condensed version of the real-time data measured by the 3710 ACM.
  • Page 39 Byte 14 = BCC ERROR CHECK. ii) 3710 ACM Response to Read Short Real-Time Data. Byte 1 = 10H = Data Link Escape (DLE) control byte. Byte 2 = 02H = Start of Text (STX) delimiter byte. Byte 3 = (DST) - destination address byte of message packet.
  • Page 40 Byte 43,44 = high order word, present kilowatt demand. Byte 45,46 = (reserved for future expansion). Byte 47,48 = power factor reading. ii) 3710 ACM Response to Read Short Real-Time Data (Continued). Byte 49,50 = low order word, present alarm status.
  • Page 41 31 -> Reserved for future use iii) Read 3710 ACM Long Real-Time Data (Message Type 04XXH). This packet is issued to a model 3710 ACM Power Meter to retrieve a detailed account of the real-time data measured by the 3710 ACM meter.
  • Page 42 3710 ACM Response to Read Long Real-Time Data. Byte 1 = 10H = Data Link Escape (DLE) control byte. Byte 2 = 02H = Start of Text (STX) delimiter byte. Byte 3 = (DST) - destination address byte of message packet.
  • Page 43 If the 3710 ACM is operating in 3-WIRE DELTA mode (Mode 1): Byte 21,22 = low order word, present L-L voltage, phase AB. Byte 23,24 = high order word, present L-L voltage, phase AB. Byte 25,26 = low order word, present L-L voltage, phase BC.
  • Page 44 3710 ACM Response to Read Long Real-Time Data (Continued). If operating in 4-WIRE WYE or DEMO mode (Modes 0 or 3): Byte 21,22 = low order word, present L-N voltage, phase A. Byte 23,24 = high order word, present L-N voltage, phase A.
  • Page 45 3710 ACM Response to Read Long Real-Time Data (Continued). If operating in 4-WIRE WYE, 3-WIRE DELTA or DEMO mode (Modes 0, 1 or 3): Byte 49,50 = low order word, present amperage, phase A. Byte 51,52 = high order word, present amperage, phase A.
  • Page 46 3710 ACM Response to Read Long Real-Time Data (Continued). The following bytes are common to all modes: Byte 81,82 = low order word, total kw reading. Byte 83,84 = high order word, total kw reading. Byte 85,86 = low order word, kw reverse reading.
  • Page 47 3710 ACM Response to Read Long Real-Time Data (Continued). If the 3710 ACM is operating in 4-WIRE WYE or DEMO mode (Modes 0 or 3): Byte 125,126 = low order word, present kva reading, phase A. Byte 127,128 = high order word, present kva reading, phase A.
  • Page 48 3710 ACM Response to Read Long Real-Time Data (Continued). The remaining section the packet is common to all voltage modes of the 3710 ACM Power Meter. Byte 149,150 = present neutral amperage, I4. Byte 151 = Relay #1 status byte.
  • Page 49 Relay Status Bytes Bit Position A) 00 -> Released 01 -> Operated 10 -> Forced Released 11 -> Forced Operated Status Input Status Byte Bit Position | B | C | D | E B) Status Input #4 C) Status Input #3 D) Status Input #2 E) Status Input #1 = 0 ->...
  • Page 50 Read 3710 ACM Status (Message Type Address 0AXXH). This packet is issued to a model 3710 ACM Power Meter to retrieve the status information on the relays, status inputs & setpoints on the model 3710 ACM Power Meter.
  • Page 51 - 50 -...
  • Page 52 3710 ACM Response to Status request. Byte 1 = 10H = Data Link Escape (DLE) control byte. Byte 2 = 02H = Start of Text (STX) delimiter byte. Byte 3 = (DST) - destination address byte of message packet.
  • Page 53 Installation and Operation Manual for further information on the event logs. The 3710 ACM can store up to 50 events in its event log which is located in NON VOLATILE RAM. The logs contain too much information to fit into one packet so the master terminal must specify which information it wants.
  • Page 54 Read 3710 ACM Event Log (Message Type Address 05XXH). (Events 1 to 18). This packet is issued to a model 3710 ACM Power Meter to retrieve the eighteen most recent event logs (Events 1 to 18) stored by the meter.
  • Page 55 3710 ACM Response to Read Event Log. (Events 1 to 18). Byte 1 = 10H = Data Link Escape (DLE) control byte. Byte 2 = 02H = Start of Text (STX) delimiter byte. Byte 3 = (DST) - destination address byte of message packet.
  • Page 56 Read 3710 ACM Event Log (Message Type Address 06XXH). (Events 19 to 36). This packet is issued to a model 3710 ACM Power Meter to retrieve the next eighteen most recent event logs (Events 19 to 36) stored by the meter.
  • Page 57 3710 ACM Response to Read Event Log. (Events 19 to 36). Byte 1 = 10H = Data Link Escape (DLE) control byte. Byte 2 = 02H = Start of Text (STX) delimiter byte. Byte 3 = (DST) - destination address byte of message packet.
  • Page 58 Read 3710 ACM Event Log (Message Type Address 07XXH). (Events 37 to 50). This packet is issued to a model 3710 ACM Power Meter to retrieve the last fourteen event logs (Events 37 to 50) stored by the meter.
  • Page 59 3710 ACM Response to Read Event Log. (Events 37 to 50. Byte 1 = 10H = Data Link Escape (DLE) control byte. Byte 2 = 02H = Start of Text (STX) delimiter byte. Byte 3 = (DST) - destination address byte of message packet.
  • Page 60 E) 5 bits -> Day F) 4 bits -> Month G) 2 bits -> Unused Event Flag Value Bit Position A | B | C | | E | A) Relay Status #3 B) Relay Status #2 C) Relay Status #1 = 0 ->...
  • Page 61 35 -> Unused 36 -> Setpoint Under Voltage Phase A 37 -> Setpoint Under Voltage Phase B 38 -> Setpoint Under Voltage Phase C 39 -> Unused Event Code Value (continued) 40 -> Setpoint Voltage Unbalance Phase A 41 -> Setpoint Voltage Unbalance Phase B 42 ->...
  • Page 62 Read 3710 ACM Max/Min Log without Reset (Message Type Address 0CXXH). (First 14 Elements). This packet is issued to a model 3710 ACM Power Meter to retrieve the first 14 elements of the max/min data stored by the meter without resetting the max/min log data.
  • Page 63 3710 ACM Response to Read Max/Min Log without Reset. (First 14 Elements). Byte 1 = 10H = Data Link Escape (DLE) control byte. Byte 2 = 02H = Start of Text (STX) delimiter byte. Byte 3 = (DST) - destination address byte of message packet.
  • Page 64 - 63 -...
  • Page 65 Read 3710 ACM Max/Min Log without Reset (Message Type Address 0DXXH). (Last 7 Elements). This packet is issued to a model 3710 ACM Power Meter to retrieve the last 7 elements of the max/min data stored by the meter without resetting the max/min log data.
  • Page 66 3710 ACM Response to Read Max/Min Log without Reset. (Last 7 Elements). Byte 1 = 10H = Data Link Escape (DLE) control byte. Byte 2 = 02H = Start of Text (STX) delimiter byte. Byte 3 = (DST) - destination address byte of message packet.
  • Page 67 G) 2 bits -> Unused Max/Min Packet Structure The location of data is dependant on which voltage mode the 3710 ACM Power Meter is operating in. If the 3710 ACM is operating in 3-WIRE DELTA mode (Mode 1): Element # 1st Packet 2nd Packet...
  • Page 68 If operating in 4-WIRE WYE or DEMO mode (Mode 0 or 3): Element # 1st Packet 2nd Packet Volts (L-N) Phase A Power Factor Volts (L-N) Phase B Amp Demand Volts (L-N) Phase C KW Demand Volts (L-N) Average Amperage I4 Volts (L-L) Phase AB (Reserved) Volts (L-L) Phase BC...
  • Page 69 Read 3710 ACM Max/Min Log with Reset (Message Type Address 0EXXH). (First 14 Elements). This packet is issued to a model 3710 ACM Power Meter to retrieve the first 14 elements of the max/min data stored by the meter &...
  • Page 70 Read 3710 ACM Max/Min Log with Reset (Message Type Address 0FXXH). (Last 7 Elements) This packet is issued to a model 3710 ACM Power Meter to retrieve the last 7 elements of the max/min data stored by the meter &...
  • Page 71 - 70 -...
  • Page 72 This packet is used to clear the KW HOURS parameter stored by the model 3710 ACM Power Meter. i) Clear 3710 ACM KW Hour (Message Type Address 10XXH). This packet is issued to a model 3710 ACM Power Meter to clear the KW Hour reading stored by the meter. Byte 1 = 10H = Data Link Escape (DLE) control byte.
  • Page 73 - 72 -...
  • Page 74 3710 ACM Response to Clear KW Hour Byte 1 = 10H = Data Link Escape (DLE) control byte. Byte 2 = 02H = Start of Text (STX) delimiter byte. Byte 3 = (DST) - destination address byte of message packet.
  • Page 75 This packet is used to clear the KVAR HOURS parameter stored by the model 3710 ACM Power Meter. i) Clear 3710 ACM KVAR Hour (Message Type 11XXH). This packet is issued to a model 3710 ACM Power Meter to clear the KVAR Hour reading stored by the meter. Byte 1 = 10H = Data Link Escape (DLE) control byte.
  • Page 76 3710 ACM Response to Clear KVAR Hour Byte 1 = 10H = Data Link Escape (DLE) control byte. Byte 2 = 02H = Start of Text (STX) delimiter byte. Byte 3 = (DST) - destination address byte of message packet.
  • Page 77 3.4.3 - FORMAT OF THE 3710 ACM CONTROL RELAY PACKET. This packet is used to control the operations of the 3 relays used by the model 3710 ACM Power Meter. i) Control 3710 ACM Relays (Message Type Address 12XXH). Byte 1 = 10H = Data Link Escape (DLE) control byte.
  • Page 78 3710 ACM Response to Controlling Relays. Byte 1 = 10H = Data Link Escape (DLE) control byte. Byte 2 = 02H = Start of Text (STX) delimiter byte. Byte 3 = (DST) - destination address byte of message packet.
  • Page 79 This packet is used to clear the Status #1 (S1) counter stored by the model 3710 ACM Power Meter. i) Clear 3710 ACM Status #1 Counter (Message Type 13XXH). This packet is issued to a model 3710 ACM Power Meter to clear the Status #1 counter reading stored by the meter. Byte 1 = 10H = Data Link Escape (DLE) control byte.
  • Page 80 - 79 -...
  • Page 81 3710 ACM Response to Clear Status #1 Counter Byte 1 = 10H = Data Link Escape (DLE) control byte. Byte 2 = 02H = Start of Text (STX) delimiter byte. Byte 3 = (DST) - destination address byte of message packet.
  • Page 82 - 81 -...

  • Page 83: List Of The 3710 Acm Packet Command Types

    3.4.4 i 14XX Not Used 15XX Not Used 7FFE Not Used Message Types designated ’Not Used’ may not be used in modifications of the present communication protocol using the model 3710 ACM Power Meters which communicate with Allen-Bradley Communication Interface Products.

Table of Contents