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INTELLIGENT CONTROLS, INC. 

PO Box 638 

Saco, Maine 04072  USA 

 

Phone:  207-283-0156   

FAX: 207-283-0158 

Toll Free: Technical Service & Sales 800-872-3455 

Web Site: 

www.incon.com

        E-mail: [email protected] 

 

This manual applies to all INCON model 1250-LTC monitors

. 

 

Copyright 2008, Intelligent Controls, Inc.  All rights reserved 

 

Summary of Contents for 1250-LTC

Page 1: ...1 INSTALLATION AND PROGRAMMING MANUAL FOR MODEL 1250 LTC PROGRAMMABLE POSITION MONITOR Solid State Indicator for SynchroTransmitter 000 2072 Rev C ...

Page 2: ...072 USA Phone 207 283 0156 FAX 207 283 0158 Toll Free Technical Service Sales 800 872 3455 Web Site www incon com E mail sales incon com This manual applies to all INCON model 1250 LTC monitors Copyright 2008 Intelligent Controls Inc All rights reserved ...

Page 3: ...or Exception Response 21 2 4 Operating Modes 34 37 2 5 Programming Notes 38 3 0 Options 39 48 3 1 Analog Output 39 3 2 High Low Relay Limits 40 45 3 2 1 Tap Change Acknowledgement 41 3 2 2 High Tap Low Tap 41 3 2 3 Total Tap Change Count 42 3 2 4 On Tap Alarm 42 3 2 5 Up To Down To Count 44 3 2 6 Pass Through Neutral Alarm 44 3 2 7 One Direction Change Count 45 3 2 8 FA 25 FA 27 Error Alarm 45 3 3...

Page 4: ... 43 4 1 Analog Output Adjustment Pots 49 LIST OF TABLES Table Page 1 1 Terminal Functions 7 1 2 DIP Switch Functions 7 1 3 Analog Output Configuration Jumpers 8 2 1 Numeric and Alpha numeric Menu Items 9 12 2 2 Serial Programming ASCII Commands 13 15 2 3 Read Registers Command Format 19 2 4 Read Registers Response Format 19 2 5 Write Registers Command Format 20 2 6 Write Registers Response Format ...

Page 5: ...in increments of 1 10th of a degree A special feature of the 1250 LTC is its ability to monitor small discrepancies in tap position A programmable limit can be set to give an alarm when the discrepancy in tap position reaches the limit Inaccurate tap position can be an early indicator of wear in the LTC mechanism or possible impending failure The 1250 LTC may be wired in parallel with existing syn...

Page 6: ...6 Figure 1 1 Mechanical Dimensions Figure 1 2 Field Wiring Diagram ...

Page 7: ...espectively 10 Relay High Contact N O A DIP switch tells the firmware which hardware options are installed so their function can be enabled It is located on the top PCB above the power transformer and is accessible through a slot in the left side of the case towards the rear of the instrument Table 1 2 DIP Switch Functions Switch Function 1 Serial Communications Option Enable 2 MODBUS Protocol Ena...

Page 8: ... to prevent the program from being changed When these terminals are jumpered the menu will read EP x instead of OP x which indicates that you can Examine each Parameter but not change them 7 After installation and programming install the rear terminal guard with screws provided 8 For models with serial options plug the cable onto the card edge with the red stripe towards the outside of the case Ap...

Page 9: ... from the menu press the SELECT ENTER key The parameter s present setting will now be displayed You can change the setting by pressing the UP or DOWN key To store the new setting press the SELECT ENTER key the display will return to the menu Table 2 1 Numeric and Alphanumeric Menu Items Num eric Alpha numeric Protocol Function Default Value Programmable Range OP 0 run Press the SELECT ENTER key to...

Page 10: ...ess ENTER OP 40 LED t Display LED Test Turns on all LED s 8 8 8 8 8 OP 41 rS t RS 232 Echo Test Re transmits characters received through the RS 232 serial port rS OP 42 InCAL Calibrates synchro input circuitry CAL OP 43 rLY t Relay Test UP and DOWN keys toggle between LO and HI relays LO then HI OP 50 dSPbL Causes the display to go blank after 60 sec OFF On or OFF OP 51 SEr Serial Communication Mo...

Page 11: ... the number of changes UP TO any tap in THOUSANDS 000 01 000 01 to 999 99 OP 71 udrLY Selects which relay will assert when the UP TO change alarm limit is reached OFF OFF LO HI OP 72 uddtE UP TO DOWN TO Change counter reference date Enter day month year 01 01 00 OP 73 uddIS Scrolls through the list of taps to select Press ENTER to display the Change Up To count Press ENTER to display the Change Do...

Page 12: ...utive tap changes in One Direction 2 2 to 30 OP 91 1drLY Selects which relay will assert when the One Direction Change limit is reached OFF OFF LO HI OP 92 1ddIS Displays the number of days since the One Direction Alarm was asserted OP 93 1dCLr Clears One Direction Change alarm CL OP 99 tO OP Toggles between Numeric and Alphanumeric menus tO OP Figure 2 1 Simplified Programming Flowchart ...

Page 13: ...ays present Tap synchro position in degrees and current On Tap deviation degrees Reads Tap 0 0 to 359 9 degrees with one decimal place of resolution Press ª enter to exit MODE nnª Segmented modes See Section 2 4 page 34 37 for details ACKRLY LOª Selects which relay will assert momentarily after each tap change Choose OFF LO or HI relay to assert momentarily after each tap change ACKDLY nn nª Sets ...

Page 14: ...mode 0 Serial Disabled 1 Data Logger Mode 2 Polled Mode 3 Sampled Mode 4 Serial Command Mode 5 Reserved 6 MODBUS Mode 7 Remote Display Driver AUTO25 ONª Enables automatic reset of the FA 25 Loss of Synchro Signal Error page 50 ON or OFF When ON the FA 25 alarm will automatically reset when the condition clears FA25RLY LOª Selects which relay is associated with the FA 25 Error Choose OFF LO or HI r...

Page 15: ... with an Up To or Down To Change counter exceeding the programmed limit is re visited the alarm will re activate UPDNRSTª Resets all Change Up To and Down To counters and alarm All Up To and Down To counters are reset to zero and an active alarm is turned off PORT bbbb w p s aª Set comm port settings baud rate word length parity stop bits and address b 2400 4800 9600 14400 19200 28800 38400 57600 ...

Page 16: ... syntax is given If no command is entered all commands will be listed with syntax but no explanations To prevent accidental or unwanted changes to the program parameters a jumper wire may be installed across terminals 3 4 With this jumper installed the numeric menu will read EP nn instead of OP nn All parameters can be viewed but no changes can be made ...

Page 17: ... 10 High Tap 0 86 12 Pass Through Neut 0 95 30 0 TAP STATISTICS Tap Max Dev Change Change Num Degrees Up To Dn To 16 0 0 0 0 15 0 0 0 0 14 0 0 0 0 13 0 0 0 0 12 0 4 0 1 11 0 4 1 2 10 0 3 2 3 9 0 4 3 9 8 0 5 9 85 7 0 8 85 215 6 0 9 215 608 5 0 9 608 1935 4 1 1 1935 5564 3 1 2 5564 6258 2 1 1 6258 7145 1 1 3 7145 5199 0 1 0 0 5199 5199 0 2 1 3 5199 8064 0 3 0 0 8064 8064 1 1 4 8064 40792 2 2 2 40792...

Page 18: ...ritten or read Others are write only special functions and cause actions to be performed when they are written Format This column defines what a register contains bit by bit in binary A row of 16 symbols shows what each of the 16 bits of the register contain MSB first and LSB last A BCD formatted floating point register is shown as follows two 16 bit binary words Bcdabcdbbcdcbcdd bcde000000vspppp ...

Page 19: ... programmed address All other addresses can be programmed and used in this mode Byte 2 Function Code When reading holding registers this byte is 03h Data Block Begins with the number of the first register two bytes in a command packet or data from the first register two bytes in a response packet Followed by the number of registers to be read two bytes in a command packet or by data from subsequen...

Page 20: ...he first register will be the next two bytes followed by programming data for subsequent registers Last 2 Bytes Error Checking CRC Lo Byte Hi Byte Table 2 5 Write Registers Command Format GAP 3 5 Char Device Address Function Code of First Register to be written to Hi of First Register to be written to Lo of Registers to Write Hi of Registers to Write Lo Min 80h 10h 10h 00h 00h 04h Byte Count Progr...

Page 21: ... 5 character frames indicates to the slaves that a new packet is to follow Byte 1 Device Address Address 0 is a broadcast address that all units respond to regardless of programmed address All other addresses can be programmed and used in this mode Byte 2 Function Code This byte will be the last command sent plus the MSB set on Exception Code Illegal Command 01 Illegal Register 02 Last 2 Bytes Err...

Page 22: ... signal is lost 40257 40258 0100 0101 Class State Type Read only Angle cumulative The value can exceed 360 0 degrees seeeeeeeemmmmmmm MSW mmmmmmmmmmmm LSW IEEE 754 1985 single precision float MSW 0100 LSW 0101 40264 0107 Class State Type Read only Tap neutral tttttttt0000nnnn 0000 are unused bits t 8 bit tap number n 4 bit neutral number both in binary 40513 0200 Class Configuration Type Write onl...

Page 23: ...HL H high relay L low relay If relay is on bit 1 else bit 0 40777 40778 0308 0309 Class State Type Read write Total tap change count ssssssssssssssss MSW ssssssssssssssss LSW MSW 0308 LSW 0309 NOTE Always write both the high MSW and low LSW words with consecutive writes do not write any other register address between these two writes 40785 0310 Class State Type Read only Tap neutral with greatest ...

Page 24: ...ss AlarmClearing AlarmStatus Type Read write Write 0 to clear Instability alarm state 000000000000000s LSB s 0 OK 1 ALARM 40804 0323 Class AlarmClearing AlarmStatus Type Read write Write 0 to clear Loss of signal alarm state 000000000000000s LSB s 0 OK 1 ALARM 40805 0324 Class AlarmClearing AlarmStatus Type Read write Write 0 to clear Change up to down to alarm state 000000000000000s LSB s 0 OK 1 ...

Page 25: ...ss AlarmStatus Type Read only Days since asserting On tap alarm dddddddddddddddd d 10ths of a day 40834 0341 Class AlarmStatus Type Read only Days since asserting One direction alarm dddddddddddddddd d 10ths of a day 40835 0342 Class AlarmStatus Type Read only Days since asserting Instability Alarm dddddddddddddddd d 10ths of a day 40836 0343 Class AlarmStatus Type Read only Days since asserting L...

Page 26: ...w extremum dddddddddddddddd d 10ths of a day 40843 034A Class AlarmStatus Type Read only Days since High draghand hit new extremum dddddddddddddddd d 10ths of a day 40865 0360 Class AlarmClearing StatisticsResetting Type Write only Write 0 to clear On tap reset 000000000000000s LSB s 0 reset 1 ignored 40869 0364 Class AlarmClearing StatisticsResetting Type Write only Write 0 to clear Up to down to...

Page 27: ...on float MSW 1101 LSW 1102 44356 1103 Class Configuration Type Read write Number of neutrals 000000000000nnnn LSBs nnnn Up to 8 neutrals in binary If field value 8 clamps to 8 44357 1104 Class Configuration Type Read write Neutral start segment ssssssssssssssss 16 bits first neutral tap 44358 1105 Class Configuration Type Read write Display r L 000000000000000d LSB d 0 disabled 1 enabled 44867 130...

Page 28: ...0000000 e LSB e 0 disabled 1 enabled 45156 1423 Class Configuration AlarmClearing Type Read write Auto reset 25 0000000 e LSB e 0 disabled 1 enabled 45633 1600 Class Configuration Type Read write RS 232 mode 0000000000000rrr LSBs rrr 000 Serial disabled 001 datalogger mode 010 polled mode 011 sampled mode 100 command 101 reserved N A 110 RS485 Modbus 111 remote display driver 45634 1601 Class Conf...

Page 29: ...aa 8 bit serial multidrop address 45889 45890 1700 1701 Class Configuration Type Read write Total tap change counter limit seeeeeeeemmmmmmm MSW mmmmmmmmmmmm LSW IEEE 754 1985 single precision float MSW 1700 LSW 1701 in thousands of counts 45891 1702 Class Configuration Type Read write Total tap change count alarm relay 00000000000000 rr LSBs rr 00 OFF 01 LO Relay 10 HI Relay 45892 1703 Class Confi...

Page 30: ...ence date for On tap counter 0000mmmm 000ddddd m Month d Day in binary 46401 46402 1900 1901 Class Configuration Type Read write Change up to down to counter limit seeeeeeeemmmmmmm MSW mmmmmmmmmmmm LSW IEEE 754 1985 single precision float MSW 1900 LSW 1901 in thousands of counts 46403 1902 Class Configuration Type Read write Change up to down to counter alarm relay 00000000000000 rr LSBs rr 00 OFF...

Page 31: ...ts number of taps 46914 1B01 Class Configuration Type Read write One direction counter alarm relay 00000000000000 rr LSBs rr 00 OFF 01 LO Relay 10 HI Relay 47169 1C00 Class Configuration Type Read write Low tap relay limit ssssssssssssssss 16 bit signed word low tap limit 47170 1C01 Class Configuration Type Read write Low tap alarm relay 00000000000000 rr LSBs rr 00 OFF 01 LO Relay 10 HI Relay 474...

Page 32: ...0000 rr LSBs rr 00 OFF 01 LO Relay 10 HI Relay 48194 2001 Class Configuration Type Read write FA 27 error relay 00000000000000 rr LSBs rr 00 OFF 01 LO Relay 10 HI Relay 48705 2200 Class State Type Read write Tap index select 00000000 uuuuuuuu Unsigned byte Zero based index of tap value 39 decimal NOTE ALWAYS initially write the tap index select register before reading any of the tap attribute regi...

Page 33: ...y Upper and lower words of Up to count corresponding to Tap index select uuuuuuuuuuuuuuuu MSW uuuuuuuuuuuuuuuu LSW Unsigned 32 bit longword denoting up to count MSW 3004 upper LSW 3005 lower NOTE To obtain a consistent 32 bit value ALWAYS read 0x3004 BEFORE 0x3005 DO NOT read or write any other register address between these reads 48711 48712 2206 2207 Class state Type Read only Upper and lower wo...

Page 34: ...ing of the taps and where the neutral taps are located 16 Base 1 Uni polar Segmented Linear Analog Neutrals can be at any tap number 17 Base 1 Uni polar Segmented Stepped Analog Neutrals can be at any tap number 18 Base 0 Uni polar Segmented Linear Analog Neutrals always at 0 19 Base 0 Uni polar Segmented Stepped Analog Neutrals always at 0 20 Bi polar Segmented Linear Analog Neutrals always at 0 ...

Page 35: ...tepped analog output that jumps with each tap change To select this operating mode use the OP 2 Func MODE command to change the value to 16 or 17 Figure 2 3 Base 1 Uni polar Mode Analog Output Programming Example A typical transformer Load Tap Changer application with taps numbered 1 to 32 2 neutral taps 17 1 and 17 2 with 9 5o per tap presently set on tap 18 would be programmed as follows OP 2 Op...

Page 36: ...ut that jumps with each tap change To select this operating mode use the OP 2 Func MODE command to change the value to 18 or 19 Figure 2 4 Base 0 Uni polar Mode Analog Output Programming Example A typical transformer Load Tap Changer application with taps numbered 0 to 16 2 neutral taps with 10 5o per tap presently set on tap 9 would be programmed as follows OP 2 Operating mode 19 OP 20 Number of ...

Page 37: ...n Mode 21 has a stepped analog output that jumps with each tap change To select this operating mode use the OP 2 Func MODE command to change the value to 20 or 21 Figure 2 5 Bi polar Mode Analog Output Programming Example A typical transformer Load Tap Changer application with 16 raised and 16 lowered taps 3 neutral taps with 10o per tap presently set on tap 2L would be programmed as follows OP 2 ...

Page 38: ...erence column in the table 6 The differences should all be approximately the same Take an average of the numbers in the Difference column The result is the Degrees Per Tap number that the 1250 LTC needs for the OP 21 D SEG or DEGSEG command 7 Press the ENTER key to return to the Programming Menu Tap Number Degrees Difference Tap Number Degrees Difference There is no programming required for the An...

Page 39: ...wired with an external power supply of 15 0 to 24 0 volts DC in series with the analog output current loop See Figure 1 3 page 7 The INCON Model 1945 is available for this purpose All other analog output options are self powered Refer to Table 3 1 below for analog output load limits Table 3 1 Analog Output Load Limits Analog Output Load Minimum Load Maximum 0 to 1 mA Zero Ohms 10K Ohms 1 mA Zero O...

Page 40: ...ause the other relay Danger to turn on This way the level of seriousness of an alarm could be communicated when remotely monitored When the Tap Change Acknowledgement is assigned to one relay HI or LO all other desired alarms must be assigned to the other relay LO or HI When the LO relay is asserted the LED above the DOWN button below the digital display will flash When the HI relay is asserted th...

Page 41: ...Y command to choose which relay output OFF LO or HI will be asserted following every tap position change When this value is set to OFF this function is disabled Do not assign another alarm to the same relay assigned to for Tap Change Acknowledgement Use the OP 4 tCrdL ACKDLY command to set the delay time Use the OP 5 tCrLt ACKHOLD command to set the duration time 3 2 2 High Tap Relay and Low Tap R...

Page 42: ...r than the alarm limit Use the OP 58 ttPdt TTCDATE command to enter a reference date To do this using the programming menu Select OP 58 ttPdt and press the ENTER key First set the Day of the month value and press the ENTER key Next set the Month value and press the ENTER key Finally set the Year value and press the ENTER key Use the OP 59 ttCdS DUMP command to display the present counter value and...

Page 43: ...tdtE OTDATE command to enter a reference date Use the OP 65 OtdIS DUMP command to display each tap and the highest measured deviation for that tap Use the UP and DOWN keys to scroll through the list of taps Press the ENTER key to select a tap and display its highest measured deviation in degrees with 1 10th degree resolution and sign example 1 3 or 0 9 Press the ENTER key to return to the list of ...

Page 44: ...o select a tap and display its Change Up To Count Press the ENTER key to display its Change Down To Count Press the ENTER key to return to the list of taps Press the MENU key to escape back to the programming menu The alarm relay will remain asserted until cleared or the counters are reset Use the OP 74 udCLr UPDNCLR command to clear an active alarm without resetting the counters Use the OP 75 udr...

Page 45: ...e tap changes in one direction reaches this limit The alarm code 1dCLt will be displayed momentarily Use the OP 90 1dCLt 1DTCLMT command to set the One Direction Change Alarm Limit Use the OP 91 1drLY 1DTCRLY command to select which relay OFF LO or HI asserts the FIRST TIME the One Direction Change Alarm Limit is reached When this value is set to OFF this function is disabled Use the OP 93 1ddIS 1...

Page 46: ...will not take effect until the command RESTART is entered Polled Mode When this mode is selected the 1250 LTC can be interrogated at any time via the RS 232 port for the current position This is done by first instructing the 1250 LTC to latch the current position by transmitting an asterisk to the unit The position is then extracted one character at a time by transmitting the digits 0 through 6 Ze...

Page 47: ...trument and to retrieve position data from the instrument very much like the RS 232 option It is a half duplex configuration MODBUS is the most likely protocol to use for a 1250 LTC equipped with RS 485 but the 1250 LTC with RS 485 will operate in all of the same serial modes listed above in Section 3 3 Certain restrictions apply due to the nature of the half duplex configuration The device commun...

Page 48: ...t use the ANACAL command The analog output may be forced to LOW MID and HIGH output signal states If menu commands are being used select the OP 31 L CAL command to force the analog output to LOW scale output If you are using the RS 232 serial port press the space bar on the computer terminal This toggles the output between LOW MID and HIGH outputs The display on the 1250 LTC should read LO The ana...

Page 49: ...The 1250 LTC has the capability to delete all user programmed values and restore all factory default program values This cold boot is accomplished by pressing the MENU key while turning on the power to the 1250 LTC There is no way to undo the effects of a cold boot The LED display can be tested Use the OP 40 LED t LEDTEST command to turn on all display LED s Press the ENTER key to stop the test Th...

Page 50: ...ched The LTC position is higher than the High Tap alarm limit ttCLt Alarm condition the Total Tap Change counter limit has been reached There have been too many tap changes total Up and Down OtGLt Alarm condition the On Tap Guard band limit has been reached One or more tap changes have stopped outside the acceptable position limit udCLt Alarm condition the Up To Down To tap change counter limit ha...

Page 51: ...E OPERATING 0 TO 55 DEG C DISPLAY 5 DIGIT 7 SEGMENT LED WITH SIGN 0 56 INCH HEIGHT FOUR STATUS INDICATOR LED S VIEWING DISTANCE 23 FEET UPDATE RATE 10 TIMES PER SECOND ACCURACY 25 DEG C 10 ARC MINUTES W TYPICAL SYNCHRO RESOLUTION 6 ARC MINUTES TEMPERATURE DRIFT 0 2 ARC MINUTES PER DEG C WITH TYPICAL SYNCHRO ELECTRICAL INPUTS SIGNAL INPUT 3 PHASE 0 TO 90 VAC INPUT ISOLATION OPTIONAL PROGRAM DISABLE...

Page 52: ...52 Model 1250 LTC Installation Programming Manual ...

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