Landis & Gyr Cashpower Gemini PLC User Manual Download

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C as h p o w e r G e m i n i P L C

Cashpower Prepayment Metering

Cashpower Gemini PLC

User Guide

Document version: 0.00

Date: 16 August 2011

Issued by Product Management: Dave Tarr

Filename: User Manual Gemini PLC (with PLC CIU Mk3) 16Aug2011.doc

Electricity Prepayment Meters

Residential

Summary of Contents for Cashpower Gemini PLC

Page 1: ...etering Cashpower Gemini PLC User Guide Document version 0 00 Date 16 August 2011 Issued by Product Management Dave Tarr Filename User Manual Gemini PLC with PLC CIU Mk3 16Aug2011 doc 2011 Landis Gyr Pty Ltd Electricity Prepayment Meters Residential ...

Page 2: ...2 38 Released Abbreviations Landis Gyr Pty Ltd Cashpower Gemini PLC User Guide Revision history Version Date Originator Comments 0 0 2011 08 16 Dave Tarr Document release ...

Page 3: ...Metering Mode Indicator ___________________________________________________13 6 9 Power kWh Indicator __________________________________________________________13 6 10 PLC Communication Data Indicator _______________________________________________14 7 Meter Operation Prepayment Mode ________________________________________________15 7 1 General ____________________________________________________...

Page 4: ..._____ 22 7 9 Reverse Power Detection and Metering____________________________________________ 23 7 10 Automatic Manual Load Reconnection_____________________________________________ 23 7 11 Disconnect on Power Failure ____________________________________________________ 23 7 12 Optical Port __________________________________________________________________ 24 7 13 Credit Reader Interface__________...

Page 5: ...__34 11 16 Meter Display State Register 0 Register 037 ______________________________________34 11 17 Software Version Number Register 048 ___________________________________________34 11 18 Power Fail Counter Register 050 ________________________________________________34 11 19 Last STS only Voucher ID in Time Format Register 053 _____________________________34 11 20 Last STS only Voucher ID in D...

Page 6: ...eviations CIU Customer Interface Unit EEPROM Electrically Erasable Programmable Read Only Memory ID Identity KWh Kilowatt hour LCD Liquid Crystal Display LED Light Emitting Diode PLC Power Line Carrier SELV Safe Extra Low Voltage SGC Supply Group Code STS Standard Transfer Specification ...

Page 7: ...y to use standard household wiring for communication between the meter and customer interface unit makes this an extremely attractive and cost effective technology The customer interface unit is fitted with a mains power cord which is simply plugged into the standard electrical outlet in the house and once commissioned automatically communicates with the meter outside Using a PLC remote access ter...

Page 8: ...customer interface unit is plugged into any convenient socket outlet in the customer s premises and is powered via the mains supply under normal operating conditions In the event of the customer s mains supply being disconnected as a result of prepayment credit expiry an internal battery is provided to wake up the customer interface unit at the press of a key A new credit voucher may now be entere...

Page 9: ...rrogation device The optical port s communication protocol complies with IEC 62056 21 Mode C 4 3 Status Indicator This yellow LED gives a quick visual indication of several important meter statuses and provides a useful diagnostic function to assist utility staff During normal operation it flashes once every 5 seconds effectively a power on indication Other status conditions are indicated by two o...

Page 10: ...emporarily inhibited from entering vouchers at the customer interface unit due to incorrect number entry on previous attempts 5 flashes Power limit exceeded The load switch will be open 9 flashes Waiting for manual load switch closure This indicates that the customer is required to press any key on the keypad of the customer interface unit to safely effect load switch closure In section 7 where me...

Page 11: ... indication of instantaneous power consumption Note The rate LED on the customer interface unit is not a reference output and cannot be used for verifying the associated meter s metrological accuracy Its main function is to give a very visible indication of energy usage i e a fast flash rate signifies high usage 5 4 Alarm Indicator A yellow alarm LED indicator duplicates the alarm indication on th...

Page 12: ... face 2 Sad Face 3 Alarm indicator 4 Load switch status indicator 5 Remaining credit indicator 6 Information mode indicator 7 Credit metering mode indicator 8 Power kWh function 9 Time display 10 Eight X 7 segment digits Normal Operation Zero Credit Display shows remaining credit kWh Load switch is closed and consumption rate indicator flashes at a rate proportional to the power being used Credit ...

Page 13: ...credit register is above the preset high credit level The three smallest wedge icons are displayed if the value in the credit register is somewhere between the preset low credit level and high credit level The two smallest wedge icons are displayed if the value in the credit register is somewhere between the preset low credit level and half of that level The smallest wedge icon is displayed if the...

Page 14: ... with changes that may be occurring at the meter e g changes in the credit level due to energy being consumed To transfer data entered at the customer interface unit e g a credit voucher to the meter Whenever a valid communication interchange takes place a visual indication is given on the LCD by briefly flashing the decimal points of the two left most display digits When a customer interface unit...

Page 15: ...n whether the meter is in or out of credit The decimal points of the two left most display digits will flash alternately at regular intervals maximum of 5 minutes to indicate the reception and transmission of valid data 7 3 Entering Prepayment Vouchers via the Keypad Prepayment vouchers are entered into the meter by keying in the numbers printed on the credit voucher via the keypad The numbers ent...

Page 16: ...cation between the customer interface unit and the meter the sequences are always preceded by the scrolling busy display refer to section 12 for more details on PLC communication 7 4 1 Incomplete Voucher A voucher entry is timed out if no key is pressed for more than 30 seconds On time out The voucher number is cleared off the display The remaining credit is displayed The happy face icon is turned...

Page 17: ...um time of 82 5 seconds 7 4 2 5 Duplicate Voucher If the voucher is rejected because it has previously been entered i e a duplicate voucher Both the happy face and sad face icons are flashed simultaneously for 5 seconds 7 4 2 6 Expired Voucher STS Only If the voucher is rejected because it is older than the oldest voucher in the meter log i e expired Both the happy face and sad face icons are alte...

Page 18: ...to the meter within a 5 minute period of each other NB Set 1st dispenser key and set 2nd dispenser key vouchers may be entered in any sequence i e the 2nd dispenser key voucher may be entered first Various ancillary functions e g clearing the meter log may be embedded into the key change process refer to the STS specification 7 5 1 3 Set 2nd Dispenser Key Voucher Refer to 7 5 1 2 7 5 1 4 Clear Tam...

Page 19: ...tivates the buzzer 0000 0000 0001 6777 4880 Display the total units counter 0000 0000 0002 0132 8896 Display the key revision number and key type 1844 6744 0738 4377 2416 Display the tariff index 3689 3488 1475 5332 2496 Display the power limit level 0000 0000 0012 0797 4400 Display the tamper state 0000 0000 0022 8172 8512 Display the instantaneous power 0000 0000 0044 2920 8064 Display the softw...

Page 20: ... 1 12 Set Credit Mode Meter Specific Proprietary Voucher On accepting a set credit metering mode voucher the meter commences operation 7 5 1 13 Set Prepayment Mode Meter Specific Proprietary Voucher On accepting a set prepayment metering mode voucher the meter commences operation as described in 7 7 5 2 Proprietary Algorithm The meter accepts information transferred according to the Cashpower Tran...

Page 21: ...xceeded variations in line voltage will result in this happening at proportionately different current levels On accepting a power limit level number the meter loads the appropriate power limit level in amps from the power limit table and converts it to Watts by multiplying by the nominal system voltage as indicated on the meter label Note It is possible to configure the meter at the time of manufa...

Page 22: ...In the case of the Gemini PLC meter when setting the meter into the decommissioned mode the following occurs The load switch is set into the open state The tamper facility is disabled When setting the meter into the commissioned mode the following occurs The load switch operates as normal The tamper facility is enabled The meter s commissioned decommissioned status can be observed in the meter sta...

Page 23: ... equivalent to 50Wh Under reverse power conditions metering will continue as normal i e credit will continue to be decremented 7 10 Automatic Manual Load Reconnection In some instances local safety regulations require that the meter not automatically re close the load switch after for example a power limit trip Under these conditions the load switch will remain in the open state until such time as...

Page 24: ...nications protocol complies with IEC 62056 21 mode C 7 13 Credit Reader Interface This port is available via an optional removable plug at the rear of the meter and should only be accessed when the meter is disconnected from power It allows for meter data such as remaining credit to be easily extracted in the event of an electronics failure From a safety point of view the meter must not be powered...

Page 25: ...ter The tamper detect function may be enabled or disabled during production or by means of a Set Options Register token The tampered condition may be monitored by using the information functions 8 3 Reverse Energy Detection The meter includes a Significant Reverse Energy SRE detection feature If the line and load wires are swapped during installation the meter will continue to operate and decremen...

Page 26: ...he most significant digit omitted e g 000874 36 The credit metering mode icon is turned on All other display digits and icons work as per the prepayment mode of operation The load switch will remain in the closed position The load switch will open if the meter is tampered decommissioned or in a power limit lockout state The total register increments as metering takes place The prepayment mode cred...

Page 27: ...o avoid confusion under this supply disconnected condition it is critical that the customer interface unit remains connected to the mains socket outlet with the outlet switch in the on position to allow PLC communications back to the meter via the electrical wiring of the house 10 3 Battery Although the customer interface unit is normally connected to the customer s mains power supply 10 2 it need...

Page 28: ...sful and the meter responds the customer interface unit beeps once and the current meter status is displayed The customer interface unit is now commissioned NB A configurable option at the time of manufacture 11 14 can be set such that on successful commissioning the meter opens the load switch for a period of 10 seconds This to give a positive indication that the correct meter is connected to the...

Page 29: ...o minimise the amount of PLC network traffic only significant changes in status at the meter are immediately updated to the customer interface unit For example the remaining credit display will only be updated when a significant digit changes However should an event such as a low credit alarm be activated the customer interface unit will be notified immediately Other functions that could change si...

Page 30: ...tomatically proceeds to interrogate the meter for an updated status Depending on the prevailing status this will result in any one of the following responses If there has been any change in the meter status it will be reflected on the display If there is a general power failure the meter will not be able to respond i e there will be no communication possible with it Under these conditions the cust...

Page 31: ...ute Information Register Functions Info Register Number Function 000 Meter number 001 Instantaneous power 002 Current credit register 003 Total units counter 006 Current 24 hr consumption 007 Previous 24 hr consumption 008 Current 30 day consumption 009 Previous 30 day consumption 012 Low credit level 013 High credit level 014 Power limit level 024 Extended meter number STS only 031 Meter fixed st...

Page 32: ...egister 006 The meter displays the number of hours into the current 24 hour period followed by the consumption kWh during this period By pressing the backspace key twice in rapid succession the hour counter and consumption value is reset to zero and a new cycle commences using this as the reference time This does not affect the previous 24 hour period statistic or either of the 30 day statistics 1...

Page 33: ...Meter Fixed State Register 1 Display Function bracketed values apply for bit set to 1 1XXX XXXX Load switch inhibit power limit lockout mode 30 minutes X1XX XXXX Significant reverse energy metered XX1X XXXX Credit metering enabled XXX1 XXXX Meter decommissioned XXXX 1XXX Meter NOT initialised default key XXXX X1XX Meter in power limit trip 30 seconds XXXX XX1X Meter out of credit XXXX XXX1 Meter t...

Page 34: ...s up or that occur during normal operation They are not stored in EEPROM Meter Display State Register 0 Display Function 1XXX XXXX Meter out of in creep lock X1XX XXXX Not used XX1X XXXX Not used XXX1 XXXX Tamper detect sensing switch state open XXXX 1XXX No EEPROM EEPROM error detected XXXX X1XX Not used XXXX XX1X 50 60 Hz mains frequency detected XXXX XXX1 Not used 11 17 Software Version Number ...

Page 35: ...most significant digit of the display if in use will be pushed off the display in this mode 11 26 Supply Group Code SGC Register Register 060 This register will contain the initial SGC value personalised at the time of manufacture Once a successful STS meter key change has been performed the information is no longer valid and is therefore cleared This option gives a quick indication of whether a k...

Page 36: ...eliable communications with the meter on an on going basis Once a meter has been successfully commissioned it is unlikely that communications should fail In the event of a communications failure the customer interface unit will display an error message 30 The following options should be tried If it happens during the commissioning process ensure that the correct meter number has been entered there...

Page 37: ...may be remotely accessed via other devices using the same PLC communication channel as the customer interface unit e g for interfacing to an Automatic Meter Reading system These communications are totally independent and will have no effect on the operation of either the customer interface unit or the meter ...

Page 38: ...t the meter cover is in place and the seals unbroken The communications interface is galvanically isolated from the mains supply isolation specification is in excess of the requirements for SELV circuits as specified in SANS IEC 60950 The customer interface unit may be mounted in any convenient location inside a customer s residence ...

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