KV/KV2 MODBUS board information from PDF file
this is not a complete listing of all information in the pdf file
but some interesting info
GEH-7282
kV/kV2 MODBUS Communications Option
Instruction Manual
Related Publications:
GEH-5081 GE kV™ Vector Electricity Meter Installation, Operation, and Maintenance Guide
Page 1 of 55
GEH-7277 GE kV2™ Multi-Function Meter Product Description, Operating Instructions, Maintenance Instructions, Upgrading, Site Analysis Guides, Diagrams
GEH-5084 MeterMate™ for DOS
Reading and Programming Software for GE Electronic Meters
GEH-5082 MeterMate™ for Windows
Program Creation Software for GE Electronic Meters
Page 2
Introduction
The kV/kV2 MODBUS Communications Board is an optional factory-supplied addition to the kV™ or kV2™Meter, or may be ordered in the form of a retrofit kit to upgrade “Communication Ready” kV™ Meters or kV2™ Meters. KV™ Meters that are capable of being upgraded may be identified by the words “Modem Ready” on the upper nameplate of the meter.
The kV/kV2 MODBUS Option Board is used to provide two-way communication to the kV™ or kV2™ Meter and may be used on S-base, A-base, and switchboard meters. It is available only on Demand/LP or TOU version of the kV™ or kV2™ Meter.
The kV/kV2 MODBUS Option Board may be used in conjunction with other GE option boards, which provide a three-phase power supply, load profile recording (kV™ only), and input/output functions. If required, the flexibility of the kV™ and kV2™ Meters makes it possible to combine up to 3 option boards in a single meter.
RS-485/MODBUS provides a half-duplex, 2 -wire, RS-485 interface for remote reading of the kV/kV2 Meter. The baud rate is fixed at 19200 bps.
All kV™ Meters, including those with kV/kV2 MODBUS boards, are programmed using GE’s MeterMate software program.
kV/kV2 MODBUS Features
The kV/kV2 MODBUS Option Board provides a means of remotely reading the kV/kV2 Meter over an electrically isolated, twisted pair, half-duplex, RS-485 link. The kV/kV2 MODBUS contains only two programmable features, discussed in more detail below.
MODBUS Device Address
The MODBUS board is delivered with a default address of 15 (0x0F). Prior to installation into a system, each device must be programmed with a unique address. Refer to Appendix A, Register Maps for the appropriate register address.
The MODBUS board must be programmed with a password that matches that of the meter on which it is installed. All MODBUS boards have a default password of MASTER_012. It is recommended that this same password be programmed into the meter on which the board is installed. If a different password is desired, the meter must be programmed with the desired password using MeterMate software. The MODBUS board must be set with the desired password using the MODBUS interface. Refer to Appendix A, Register Maps, for the appropriate register address.
Data Rate
The kV/kV2 MODBUS Option is configured for 8 data bits, 1 stop bit, no parity, and a fixed baud rate of 19200bps
Option Board Compatibility
Introduction
The kV™/kV2™ MODBUS Option Board may be used in conjunction with the RG-1 Revenue Guard, I/O-2 Input/Output, and the LP-2 Load Profile option boards. In cannot be used with either the I/O-1 Input/Output, the LP-1 Load Profile option boards or the kV/kV2 Internal modem board. The MODBUS is used in lieu of the kV/kV2 Internal Modem board.
The kV™/kV2™ MODBUS Option Board is always installed directly onto the kV™/kV2™ Meter. Either the I/O-2 Input/Output or the LP-2 Load Profile option board may then connect to the kV™/kV2™ MODBUS Option Board if desired. If all three option boards are used, the option boards must be installed in the following order:
1. kV™/kV2™ MODBUS Option Board
2. LP-2 Load Profile option board (kV™ only)
3. I/O-2 Input/Output option board (or MIO board (kV2™ only)
MeterMate™ Software Compatibility
The kV/kV2 MODBUS Option Board is compatible with the following software:
MeterMate™ Version 2.12 or greater. Note that this software will ignore the MODBUS board.
There are restrictions on the way a kV/kV2 meter must be programmed in order to operate correctly with the MODBUS board. See Appendix C for details.
Meter or a kV2™. “Modem ready” kV™ Meters will have “Modem Ready” printed on the meter nameplate. If the kV™ Meter nameplate does not have this designation, the meter cannot be retrofitted with a kV/kV2 MODBUS board.
Any kV2™ meter can be retrofitted with a MODBUS board.
S-Base kV/kV2 MODBUS Kits
If a communications cable with a RJ-11 connector is desired, order GE part number 9938627009. This kit contains the following material:
Component
GE Part #
Qty
kV/kV2 MODBUS circuit board
99384980050
1
Cable assembly
9938583001
1
Connector holder
9938622001
1
PC board spacers
9935026005
4
Wire tie
9689597010
1
MODBUS Label
9938782001
1
Instruction sheet
GEI- XXXXX
1
A-base kV/kV2 MODBUS Kits
If a communications cable with an RJ-11 connector is desired, order GE part number 938627010. This kit contains the following material:
Component
GE Part #
Qty
kV/kV2 MODBUS circuit board
9938498050
1
Cable assembly
9938583004
1
Connector holder
9938622001
1
PC board spacers
9935026005
4
MODBUS Label
9938782001
1
Instruction sheet
GEI- XXXXX
1
Commands Supported
The MODBUS protocol specification can be obtained by visiting the Website
www.modbus.org/default.htm. The kV/kV2 MODBUS board supports a subset of the standard MODBUS commands. These are:
0x03 Read Holding Registers
0x04 Read Input Registers
0x06 Preset Single Register
0x16 Preset Multiple Registers
Password and Data Access
The kV/kV2 meters do not, by themselves, support MODBUS; the native protocol for these meters is PSEM (ANSI C12.18) and AMRA Tables (ANSI C12.19). Consequently, the MODBUS board must convert MODBUS requests to PSEM requests in order to retrieve data from the meter. Meter responses must be translated back to MODBUS protocol before they are transmitted back to the MODBUS host. This operation is transparent to the MODBUS user and the information is provided only as background. KV/kV2 meters are generally password-protected. In order for the MODBUS board to retrieve meter data, it must “know” the meter password. MODBUS boards are shipped from the factory with a default meter password of “MASTER_012”. This is stored in the MODBUS board as the equivalent sequence of hexadecimal digits. GE recommends that the user program the same password into the meter. However, if the user wants to use a different password, it may be changed in the meter using the GE programming software (MeterMate) and then must also be changed in the MODBUS board by writing the desired password to the sequence of registers reserved for same (see register maps).
The set of data available through the MODBUS interface is a subset of the data contained in the meter(s) and accessible through the PSEM interface. In addition, in order to gain access to the full set of MODBUS registers listed in Appendix B, some of the meter parameters must always be programmed with predetermined, fixed values. If these fixed programming parameters are changed, behavior of the MODBUS interface is undetermined.
Appendix E - Meter Programming Parameters
Required Programming Parameters
Use GE’s MeterMate software to program your kV/kV2 meters. Be sure you have the required soft-switches enabled in the meters. The following items must be programmed exactly as specified in order for the MODBUS board to function correctly with a kV/kV2 Meter. Quantities to be metered must be assigned in the specified order. Any programmed parameters not explicitly restricted below may be programmed as the user requires.
KV Meter
Required Soft-switches
A, K, R, T
Demand Metering
Demand Interval Length 15 Minutes
Demand Interval Type Block
Billing Measures
kWh Total Del Only
kvah Total Lag-Lead
Demand Measures
kW Total Del Only
kva Total Lag-Lead
Recorder Options
Option Board Memory Configuration Both Load Profile & Self Read
Load Profile Interval Length 15
Load Profile # Channels 2
Channel Configuration
Channel 1 kWh
Channel 1 Scale Factor 1
Channel 2 Alternate Measure
Channel 2 Scale Factor 1
Alternate Measure kVAh
KV2 Meter
Required Soft-switches
A, K, Q, T, X
Measurement Profiles (Order is not important)
No of Measurements in Profile 7
kWh Total Del Only F+H
Page 52
kWh Total Rcvd Only F+H
kWh Total Del+Rcvd F+H
kvarh Total Lag Only F+H IEEE
kvarh Total Lead Only F+H IEEE
kvarh Total Lag+Lead F+H IEEE
Phasor kVAh F+H IEEE
Demand Metering
Demand Interval Length 15 Minutes
Demand Interval Type Block
Billing Measures
kWh Total Del Only F+H
kWh Total Rcvd Only F+H
kvarh Total Lag Only F+H IEEE
kvarh Total Lead Only F+H IEEE
Phasor kVAh F+H IEEE
Demand Measures
kW Total Del Only F+H
kW Total Rcvd Only F+H
kvar Total Lag Only F+H IEEE
kvar Total Lead Only F+H IEEE
Phasor kVA F+H IEEE
Coincident Demands
kW Total Del Only F+H – Coincident to Phasor kVA F+H IEEE (Demand 5)
kW Total Recd Only F+H – Coincident to Phasor kVA F+H IEEE (Demand 5)
Average PF - Numerator
kWh Total Del Only F+H
Average PF - Denominator
Phasor kVAh F+H IEEE
Recorder Option
Days of LP Memory 30
Load Profile Interval Length 15
Load Profile # Channels 8
Channel Configuration
Channel 1 kWh Total Del+Rcvd F+H
Channel 1 Scale Factor 1
Channel 2 kvarh Total Lag+Lead F+H IEEE
Channel 2 Scale Factor 1
Channel 3 Phasor kVAh F+H IEEE
Channel 3 Scale Factor 1
Channel 4 kWh Total Del Only F+H*
Channel 4 Scale Factor 1
Channel 5 kWh Total Del Only F+H
Channel 5 Scale Factor 1
Channel 6 kWh Total Rcvd Only F+H
Channel 6 Scale Factor 1
Channel 7 kvarh Total Lag Only F+H IEEE
Page 53
Channel 7 Scale Factor 1
Channel 8 kvarh Total Lead Only F+H IEEE
Channel 8 Scale Factor 1
* This is place holder only; the MODBUS board will compute the data for this channel.