GEH-7275 kV RSX - RS232/RS485 Communications Option Instruction Manual March 10, 1999
Notice: The information contained in this document is subject to change without notice. GE makes no warranty of any kind with regard to this material, including, but not limited to, the implied warranties of merchantability and fitness for a particular purpose. GE shall not be liable for errors contained herein or incidental consequential damages in connection with the furnishing, performance, or use of this material. This document contains proprietary information, which is protected by copyright.
Related Publications: GEH-5081 GE kV™ Vector Electricity Meter Installation, Operation, and Maintenance Guide 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 GEI-101424 kV RSX Kit Installation Guide GEI-101421 Telephone Line Surge Protection Devices Page 3
Table of Contents INTRODUCTION 6 KV RSX FEATURES, EXTERNAL MODEM MODE 6 Data Rate Setup Strings Pulse/Tone 6 6 6 Call Origination Introduction Programming Phone Numbers Retry Algorithm Call Origination Window Data Calls Event Calls Power Outage Calls (optional) Power Restoration Calls Test Calls 7 7 7 7 7 7 8 8 9 9 Call Answer Answer Window Number of Rings Answer Lockout Timer 9 9 9 9 KV RSX FEATURES, RS-232 SIMPLE SERIAL MODE Data Rate KV RSX FEATURES, 9 10 RS-485 SIMPLE SERIAL MODE Data Ra
MeterMate Software Compatibility 16 TESTING METER CALIBRATION 17 METER INSTALLATION 17 Test Call 17 RENEWAL PARTS 18 kV RSX Kits S-Base kV RSX Kits A-base kV RSX Kits Call-in On Outage Upgrade Kit 18 18 18 19 Other Renewal Parts: 19 APPENDIX 20 External Modem Mode kV RSX Setup Strings Baud Rate Typical External Modem Setup Strings Typical Host Modem Setup Strings 20 20 21 22 23 RS-232 Simple Serial Mode 25 RS-485 Simple Serial Mode 26 Determining the Mode of an Installed kV RSX 28 U
computer using a null modem cable. It also serves as an RS-232 interface to third party communications devices. The baud rate for this mode is fixed at 9600 bps. Introduction The kV RSX Communications Board is an optional factory-supplied addition to the kV™ Meter, or may be ordered in the form of a retrofit kit to upgrade “Communication Ready” kV™ Meters. Meters that are capable of being upgraded may be identified by the words “Modem Ready” on the upper nameplate of the meter.
determined by contacting your local telephone company. Call Origination Introduction The kV™ Meter is capable of originating a phone call for the following reasons: • Scheduled data call • Event (i.e. errors, cautions, diagnostics) • Power outage (optional) • Power restoration • Test call (1-15 minutes) between each call cycle (primary/secondary phone numbers). If a connection cannot be established after the programmed number of call cycles, the modem will wait four (4) hours and repeat the process.
software on a particular day of the week, combination of days of the week, or every day of the week at a single specified time. Using this option, the maximum number of data calls per day is one. 2. Call on a specific date and time - this option enables calls to occur on a specified date at a specified time. Only one date and time will be stored in the kV™ Meter, therefore, this field will need to be reprogrammed during each data call.
Outage Retry Algorithm If the kV™ Meter outage call to the primary phone number is unsuccessful the meter will delay for 2 minutes, then attempt to call the alternate phone number, if provided. Alternatively, it will retry the primary number. If both calls are unsuccessful, the modem will power down and make no further attempts to dial the host software. on a particular day of the week, combination days of the week, or every day of the week.
programmable features; there are no AMRA tables in the option board. It simply provides a pass through communications link to the kV Meter. In this mode the kV meter can be communicated with using a 9-pin null modem cable connected between the kV RSX communications cable and the RS-232 compatible communications port of the host device. Refer to the Appendix for connection details.
Figure 1: Option board stack The Revenue Guard option board is not part of this stack and is not affected by the presence of other option boards. Note: The kV RSX Option Board must always be installed as the inner most option board (the board closest to the kV™ Meter’s main board). The kV RSX board is installed as follows: Figure 4: RS-232 Simple Serial Mode 1.
or, it may be installed directly to the LP2 option board. Either way, the I/O-2 option board is installed in a similar manner to the LP-2 option board described in step 6 above. the slot and up against the base. Make sure that the cable has been brought up on the outside of the shroud. 3. Check the headers on the kV RSX board to make sure that the pins are not bent or out of position.
kV™ Meters with 26 pin headers instead of 30 pin headers cannot be retrofitted with the kV RSX Option Board . 6. With the kV RSX Option Board “stack” in hand, insert the tabs on the kV RSX Option Board into the slots in the bezel (see figure 8). Figure 9 : Check "RS" box Installation on A-base Meters While the meter is unassembled, the A-base communications cable assembly must be installed. This cable assembly is installed in A-base meters as follows: 1.
4. 5. Check the headers on the kV RSX board to make sure that the pins are not bent or out of position. Orient the smallest black connector such that the indexed (filled) hole in the black connector is lined up with the missing pin in the 4 pin header. Plug the connector assembly into the header on the RSX board. Orient the larger black connector such that the indexed (filled) hole in the black connector is lined up with the missing pin in the 6 pin header.
I/O-1 Input/Output Option Board (Obsolete) The I/O-1 Input/Output option board (GE part # 9938226002) is now obsolete and has been replaced by the I/O-2 Input/Output option board (GE part # 9938226004). The I/O-1 option board cannot be used with the kV™ RSX Option Board. If I/O is needed in a kV™ Meter with a modem, the I/O-2 option board must be used. See Table 1: I/O-1 Compatibility for more details.
I/O-2 Input/Output Option The I/O-2 Input/Output option board (GE part # 9938226004) is a direct replacement for the I/O-1 option board (see above) and was designed to be compatible with the kV RSX Option Board. It may be installed directly onto the kV™ Meter, the kV RSX Option Board, or to the LP-2, Load Profile option board. See Table 2: I/O-2 Compatibility for more details.
Testing Meter Calibration If the kV RSX is in simple serial mode, meter calibration can be tested in kV RSX equipped kV™ Meters as outlined in the kV™ Meter Installation, Operation, and Maintenance Guide, GEH 5081B. If the kV RSX is configured in the external modem mode, a compatible external modem must be connected to the kV RSX communications cable before powering on the meter to perform calibration.
connection and carrier detected. By monitoring this LED (as well as any LEDs on the external modem), correct operation of the kV RSX, can be verified during meter installation. Note: When the kV™ Meter is first energized at the installation site, the carrier detect LED will illuminate to indicate that the kV RSX is properly powered. After the kV RSX is initialized, the carrier detect LED will go out. If the LED stays illuminated for more than 5 seconds, the kV RSX board is defective and should be replaced.
Call-in On Outage Upgrade Kit Order GE part number 9935143001.
Appendix External Modem Mode For correct operation in external modem mode, the kV RSX requires that the operating mode jumpers be positioned correctly, an external modem be connected to the communications cable and the setup strings and baud rate be correct for the modem. At the time of power up, the kV RSX initializes the external modem. If the modem is not present or the set up strings or baud rate are incorrect, the kV RSX will continue to try to configure the modem.
Local Echo - Local echo of modem commands must be set to off (E0). On/Off Hook Control - The external modem is initialized to on hook (H0). Modem Result Messages - Configure the modem to respond with AT command result messages (Q0 ). Format of Result Messages - Configure the modem to respond with text rather than numeric result messages (V1). Carrier Detection - Configure the modem to control the carrier detect RS-232 signal line based on the presence of the carrier signal (&C1 ).
If the answer (and/or originate) connect baud rate is to be other than the DTE rate or if a particular answer (and/or originate) connect baud rate is desired it must be configured through the answer (and/or originate) modem string. The RSX will not adjust its DTE rate to that of the negotiated connection baud rate. This is not a problem for those modems which fix the DTE rate regardless of the connection rate (DCE rate).
Typical Host Modem Setup Strings The following table will help configure the most popular host modems using MeterMate for DOS. In general, modems should be set to factory defaults, with command echo suppressed, modem signals (CD, DTR, DSR) configured for normal operation, and error correction disabled.
Figure 15 External Modem Connections for the DB-9 Cable.
RS-232 Simple Serial Mode RS-232 is used extensively for communications between computers and peripheral devices such as the mouse, keyboard and etc. Another example is the use of the RS-232 port on a computer to communicate with the kV meter using the Smartcoupler. The kV RSX, in RS-232 mode, provides a straightforward, isolated, connection between the kV Meter and the host device. The permanent connection of the kV Meter to a personal computer, for continuous data collection, is an example.
RS-485 Simple Serial Mode RS-485 communications use differential voltage signals to improve on the noise immunity and distance limitations of RS-232. When fully implemented, RS-485 enables many devices to share a single communications bus. The kV RSX implementation of RS485 is point to point, with no multi-drop capability at this time. It is useful if the communications distance is greater than the 50 feet provided by an RS-232 link.
Figure 19 RS-485 Connections for the DB-9 Cable. Figure 20 RS-485 Connections for the RJ-11 Cable.
Determining the Mode of an Installed kV RSX The kV RSX option board is not detected by the meter in either RS-232 or RS-485 simple serial modes. There are no tables in the option board when it is in either of the simple serial modes. There is no way to read the meter and find out what mode the option board is in.
Using MeterMate Version 2.12 with the kV RSX MeterMate 2.12 can be used to build programs for both the kV Modem and the kV RSX option boards. The following instructions pertain to building MeterMate programs for the kV RSX option board operating in the external modem mode of operation. Default MeterMate Program for kV RSX Begin by creating a basic kV RSX default program from which all kV RSX programs will be built.
External Modem Reset Under the Call Answering options, the RSX Reset setup string defaults to z. This sends an ATZ to the external modem to set the external modem to its stored profile. If the factory, rather than the stored profile, is desired change the RSX Reset string to &F.
Programming to use the Optional RJ-11 Cable If the program is being built for a kV RSX that uses a communications cable with the RJ-11 (telephone jack) rather than the DB-9 (9 pin) connector, change the RSX Init setup string in the Modem Configuration form as follows: Page 31
Index A A-base kV RSX kit, 18 A-base meters, 6, 12, 13, 17 Appendix, 20 B retry algorithm, 7 Revenue Guard option board, 10, 15 S S-base kV RSX kit, 18 S-base meters, 6, 12, 17 scheduled data call, 7 setup strings, 6 battery, 8, 9, 14, 15 battery holder, 14, 15 battery test, 9 T C test call, 7, 9, 17 test mode, 17 tone dialing, 6 calibration, 17 E event call, 7 F FCC, 2 I I/O option board, 10, 11, 12, 15, 16 K knockout, 12, 13, 14 L Light Emitting Diodes, 17, 18 Load profile option board, 10, 11
Page 33
