Elegant Manual
Contents
1. Scroll system message display back one page 3 3 Display Commands Command Description F1 Display online help screen SITE UTILITY CONTROL SYSTEM SOFTWARE USER MANUAL Scroll Lock Pause Resume system log messages VERB Set system log verbose level to n 0 2 3 4 Engineering Commands Command Description LEVEL Toggle HPU Oil level display between inches and mV for calibration Terminal with DGH modules on COM 1 Terminal with DGH modules on COM 1 at 300 baud for module setup Terminal with mirror telescope on COM 5 Dump system log to the file TEMP LOG F3 Dump screen to the file SCREEN BMP in Windows BMP format 3 5 Other Commands Q EXIT Exit the program SITE UTILITY CONTROL SYSTEM SOFTWARE USER MANUAL Configuration 4 Site Utility Configuration 41 Sitiutil ini file Magellan Last modified 10 28 2002 by JMS This file contains all easily modified initialization data for the site utility program Lines starting with a are ignored Every other line contains a description followed by an equal sign followed by a data value DO NOT change the order of the data values the program ignores the description in front of them and DO NOT add blank lines between values Telescope the program is running at Magellan 1 Serial communication constants Address of this computer on the line to the host2. The hydraulic pressure unit is the oil pump that drives the telescope s hydrostatic pads Its status is displayed in the middle left of the SITEUTIL display The HPU system can be switched between Local labeled Hand on the switch and Remote labeled Auto on the switch modes The mode either Remote or Local is displayed to the right of the HPU label onscreen followed by either On or Off depending the HPU s current state For computer control of the HPU the HPU must be in Remote Auto mode The first line below the HPU title displays the level of oil in the HPU s reservoir in inches To the right of that is a LED which turns red if the oil is sensed to be too low or green if the oil level is normal The oil level can also be displayed in mV the raw load cell output using the LEVEL command if the mV to inches conversion factors in SITEUTIL INI need to be calibrated Immediately below the oil level line is an oil temperature indication in degrees C The next line displays the status of the oil filters in the HPU There are three filters main circulating and cooling If a filter needs to be changed the filter name will turn red onscreen otherwise the filter name is black Note that not all filters are always used so one of these might be red without actually indicating the need for a filter change The final line displays the current communication status with the three DGH modules used to read all HPU data DGH modules a b and
3. The Toshiba fan controller is in local mode so the fan cannot be commanded to run or stop remotely Push the local remote button on the Toshiba to switch to remote mode 007 Vent fan com error n There was a communications error with the Toshiba tunnel ventilation fan controller If the tunnel fan display says Fan Fault you might be able to reset the error with the FAN RESET command The most common fault is an over voltage during deceleration The fault will be displayed on the Toshiba s control panel The other possibility is that there are genuine communication problems Look at the system log in verbose mode to check for Toshiba commands and responses and check communication wiring 008 Vent fan error messages suspended There were to many communication errors with the Toshiba fan controller Further error messages will be suppressed 009 Oil Chiller x com error n There was a communications error with the oil chiller with address x This can mean several things the chiller might be off the chiller might be on but with no oil flow or there are actual wiring or other communications problems 010 Oil Chiller x error messages suspended There were too many com errors with the given chiller Further error messages will be suppressed 011 Fan command ignored fan may not run with louver closed You tried to close the ventilation fan louvers with the fan running or run the fan with the louvers closed 012 Host
4. It have sensors to control the oil level and oil temperature There are oil filters in this unit main circulating and cooling e Two Oil Chillers it is used to cool oil e Tunnel fan It allows to keep telescope temperature near ambient temperature The end of tunnel fan is covered by louvers that are opened when fan is switched on The fan is controlled by a Toshiba fan controller e Two chillers to supply glycol water mix They are near the telescope buildings One HVAC chiller supplies air conditioning on the telescope building and a second is used to supply primary mirror cooling system e Two Air Compressors It supplies clean dry pressurized air Also there are two driers with two tower drying In normal operation the drier should switch between the two towers periodically The Site Utility Control System Software has the following characteristics e Accept high level commands to control Site Utility units and convert them to low level commands for the various low level controllers e Report the position and status of the Site Utility units e It allows to change temperature values unit status etc SITE UTILITY CONTROL SYSTEM SOFTWARE USER MANUAL Interface 2 Site Utility Control System Interface The next drawing is the site utility interface Unit 1 Main Circ Cool Unit 2 14 56 04 45 9968 UT set by TCS to 14 56 05 35 SITE UTILITY CONTROL SYSTEM SOFTWARE USER MANUAL 21 HPU Interface
5. c These should be lit green If they re red some status will be displayed as question marks until communication is resumed If communication is down it s likely that the HPU just isn t getting power 22 Oil Chiller Interface The HPU s oil is cooled by a pair of oil chillers Their status is displayed in the section to the right of the HPU s display The two chillers are listed as Unit 1 and Unit 2 If their name is in red communication with them is down This typically indicates that they simply aren t powered on At the time of this writing they are set to turn on when oil flow rises to a certain level meaning that the HPU has been turned on So to turn them on remotely simply turn on the HPU To be in this mode the switch on their front panel should be set to Local The Remote setting doesn t do anything at this time To the right of the unit names are two columns the requested and current temperature of the oil in that chiller in degrees C If communication is down with the chillers these temperatures will be displayed as question marks SITE UTILITY CONTROL SYSTEM SOFTWARE USER MANUAL 2 3 Tunnel Fan Interface The entire telescope structure is kept near ambient temperature by a very large tunnel fan The end of the tunnel is covered by louvers which must be open to run the fan The fan is driven by a Toshiba fan controller Note that the fan should be on and the louvers open any time the HPU and oil chillers a
6. com error x There was a host TCS communications error Put the log into verbose mode to see what is being said between the computer and the TCS The error number given helps pinpoint where in the source code the error occurred 013 Host error messages suspended 20 SITE UTILITY CONTROL SYSTEM SOFTWARE USER MANUAL The host TCS had too many consecutive communication errors Further error messages will be suppressed 61 EDS Log data formats 800 899 800 Hidraulic Pressure Unit HPU information Format 800aaaaabbbbbbcccccddddeeeef aaaaa HPU Oil Level in inches float bbbbbb HPU Oil Level in mV float ccccc HPU Oil Temperature in degrees C float dddd DGH a Reading hex 0 1 bit 0 1 and bit 121 Local mode Hand switch Off 0 1 and bit 120 Local mode Hand switch On 0 0 and bit 121 Remote mode Auto switch 2 0 Oil Level OK 1 Oil Level LOW 3 0 Main Pump Filter OK 1 Main Pump Filter Error 4 0 Circulating Pump Filter OK 1 Circulating Pump Filter Error 5 0 Cooling Pump Filter OK 1 Main Pump Filter Error 12 0 Remote Turn On ON 1 Remote Turn On OFF eeee DGH d Reading hex 0 Toshiba Fan Controller Remote Reset 0 Reset 1 Normal 1 Louver Command 0 Open 1 Close 2 Toshiba Fault 0 OK 1 Fault 3 Toshiba Fan Remote Command 0 Run 1 Stop f HPU status bits hex 0 DGH a Com Error 0 OK 1 Error 21 SITE UTILITY CONTROL SYSTEM SOFTWARE USER MAN
7. computer Address L Prompt character for this computer Prompt SITE UTILITY CONTROL SYSTEM SOFTWARE USER MANUAL Response character of this computer Response Amount in parts per million to speed up or slow down the system clock Use this to make the system clock as accurate as desired ClockPPM 149 Fluid level DGH 1500 reading in mV slope zero Zero point for HPU fluid level mV gt inches conversion HPU Zero1500 9 0 Slope for HPU fluid level mV gt inches conversion HPU Slope1500 3 0 Control offset from ambient temperature in deg C for the oil chillers Chiller Tempoff1 0 5 Chiller Tempoff2 1 0 42 Siteutil ini Magellan Il 43 Siteutil ini Description The Site Utility program reads a small amont of configuration data from the file SITEUTIL INI which is in the same directory as the Site Utility program This is a simple text file which can be edited with any text editor All lines starting with a are ignored all other lines are significant Non comment lines will have a label an equal sign and a value Do not change the order of the lines or add blank lines that aren t begun with a as this will interfere with the SITEUTIL program s ability to read the file The following values can be set in this file Address The address character that the SITEUTIL program responds to as per the control system serial communication documents This sh
8. ARE ESTER X RETE RARE ERA 8 3 9 Other eI RERUM Ee eire 8 4 SITE UTILITY enata tuse ta oenoensenoonae en soets bassossa eo onaen 9 4 SritiatiLani file Magellan eee tet reete E 9 4 2 Siteutiliint Magelan sce tenir pite pe etre beer ee reper e dp rte Nees a Prep aet eode teet 10 4 3 Siteutilani Description rere ce RE ERR DEREN ERREUR DEOR RR REGERE RE EET RE 10 4 4 Starting the Progra sss essen eo t rni ten ee spaces tie i c He re e titt 11 5 CONTROL SYSTEM SERIAL COMMUNICATION STANDARDS ee eeeee eene estne 13 Dsl Command Description tero e HO EGER RIS His e e eee tei En 14 6 LOG MESSAGE ORE UD 19 6 T EDS Eos data formats 800 899 eet ones be ERE RP EE PE 21 7 SITE UTILITY CONTROL SYSTEM DIFFERENCES BETWEEN MAGELLAN I AND Il 28 8 TROUBLESHOOTING eveneonsonoono en 0000000 29 SITE UTILITY CONTROL SYSTEM SOFTWARE USER MANUAL Overview 1 Overview ofthe Site Utility Control System The Site Utility Control System allows to control temperature of telescope primary mirror and telescope building It also control devices that supplies oil for telescope motion pressurized air and glycol water mix It has the following devices e Hidraulic Pressure unit This is the oil pump
9. Incoming temperature degrees C 10 ie 123 12 3 int ReadingDGHq 0 eeee Telescope Chiller Outgoing temperature degrees C 10 ie 123 12 3 int ReadingDGHq 1 ReadingDGHq 2 g Telescope Chiller status bits hex 0 DGH n Com Error 0 OK 1 Error 1 DGH o Com Error 0 OK 1 Error 2 DGH p Com Error 0 OK 1 Error 3 DGH q Com Error 02OK 1 Error 804 Air driers and compressors information Format 804aaaabbbbc Compressor Air Drier bit senses not yet known aaaa DGH e Reading hex 0 Comp 1 Auto Lag Output 25 SITE UTILITY CONTROL SYSTEM SOFTWARE USER MANUAL mnm Comp 1 Auto Lead Output 2 Comp 1 Stop Output 3 Comp 1 Constant Run Output 4 Comp 1 24 VAC On 5 Comp 1 Alarm Comp 2 Auto Lag Output Comp 2 Auto Lead Output Comp 2 Stop Output Oo NI oO Comp 2 Constant Run Output 10 Comp 2 24 VAC On 11 Comp 2 Alarm bbbb DGH f Reading hex 0 Drier 1 Power On 1 Drier 1 Left Tower Drying 2 Drier 1 Right Tower Drying 3 Drier 1 Fail to Shift 4 Drier 1 Purge Saver On 5 Drier 1 Power On Drier 1 Left Tower Drying Drier 1 Right Tower Drying Drier 1 Fail to Shift Oo NI oO Drier 1 Purge Saver On c Air Drier Compressor status bits hex 0 DGH e Com Error 0 OK 1 Error 1 DGH f Com Error 0 OK 1 Error 26 SITE UTILITY CONTROL SYSTEM SOFTWARE USER MANUAL Successes 900 999 6 2 993 Host error messages resumed Com
10. THE OBSERVATORIES OF THE CARNEGIE INSTITUTION OF WASHINGTON 813 Santa Barbara Street Pasadena California 91101 Phone 626 577 1122 e Fax 626 795 8136 SITE UTILITY CONTROL SYSTEM SOFTWARE User Manual Document Code 01 00 16 User Manual Author Jose M Soto and Silvia Baeza Date April 2008 Revision Jose M Soto Revisions Table o me April 2008 Document Update May 7 2003 Document Creation Table of Contents 1 OVERVIEW OF THE SITE UTILITY CONTROL SYSTEM ierennoononsoonoonoonsonsenaoosono 1 2 SITE UTILITY CONTROL SYSTEM INTERFACE eere esee nete eee tnnt nae osonnenaonnona sesoonse sesta 2 2 1 HPU Intertace RUE EE 3 2 2 01I Chiller Interface atr ERR ER REOR antama EE EROR des kenake a 3 2 3 Tunnel Fan Int tface eee lect te ede pee mese utto ance ae 4 2 4 HVAC and Telescope Chiller Interface enne Eens Eae ot EVENE EEES teen nennen entrent 4 2 5 Compressor Air Drier Interface esent nen nette tree ete ersten teen nennen 5 3 COMMANDS SUMMA RY eee sess ss en seen suse sens sos snas essen sensns enses en 6 3 T User Commands ee re aepo ee pee e eee e Pe eo rper oe tian 6 3 2 Message Commands ERROR RR E UI USER Ur Ue qs 7 3 3 Display Commands see Rt eee e ier e e aa ae eed 7 34 Engineering Commands 5i reet RE EEUU ERE Eb ERE Eee PER ERR
11. UAL 1 DGH b Com Error 0 OK 1 Error 2 DGH c Com Error 0 OK 1 Error 3 DGH d Com Error O2OK 1 Error 801 Fan status Toshiba and oil chillers status Format 801aaaabbbbcddddeeeeffffggggh aaaa Commanded Fan Speed Hz 100 ie 1234 12 34 Hz int bbbb Current Fan Speed Hz 100 ie 1234 12 34 Hz int cccc Toshiba status bits hex 0 Local mode 0 Remote 1 Local 1 Local Run Stop State 0 Off 1 On 2 Louver Open 0 Closed 1 Open 3 Com Error 0 OK 1 Error dddd Oil Chiller 1 Requested Temp degrees C 10 ie 123 12 3 int eeee Oil Chiller 1 Current Temp degrees C 10 ie 123 12 3 int ffff Oil Chiller 2 Requested Temp degrees C 10 ie 123 12 3 int 999g Oil Chiller 2 Current Temp degrees C 10 ie 123 12 3 int h Oil Chiller Status hex 0 Oil Chiller 1 Com Error 0 OK 1 Error 1 Oil Chiller 2 Com Error 0 OK 1 Error 802 HVAC chillers to supply glycol water mix information Format 802aaaabbbbccccddddeeeef aaaa DGH g Reading hex 0 HVAC Chiller Remote On Off 1 Compressor 1 On Off 2 Compressor 2 On Off 22 SITE UTILITY CONTROL SYSTEM SOFTWARE USER MANUAL 3 Compressor 3 On Off 4 Compressor 4 On Off 5 Compressor 5 On Off 6 Compressor 6 On Off 7 High Pressure 1 Fail 8 Freeze 1 Fail 9 High Pressure 2 Fail 10 Freeze 2 Fail 11 High Pressure 3 Fail 12 Freeze 3 Fail 13 High Pressure 4 Fail 14 Freeze 4 Fail bbbb DGH h Readin
12. ack if communication is functional or red if communication is down The LED next to the name is black if the unit is off green if it s on The following field displays which run mode the compressor is in Run Stop Lag or Lead If the two compressors are running simultaneously one should be set to lag and one to lead the compressor set to lead does the bulk of the work while the one set to lag assists when large air flows are needed The last entry Alarm lights red if the compressor has experienced a fault condition and black otherwise The two driers are listed as Drier1 and Drier2 As with the compressors the name is red if communication is down and black if communication is normal The LED next to the name lights green if that drier s power is on black if it s not LTD and RTD stand for left and right tower drying They will light green if the tower is drying or be black if it s not in use In normal operation the drier should switch between the two towers periodically To the right of these indicators is an error indicator FS FS stands for Fail to Shift which means the drier failed to switch between towers for some reason FS will light red in this case and be black during normal operation Next is PS which lights green if the drier is using power saving mode and is black otherwise The final line displays the communication status of the two DGHs used to control and monitor the driers and compressors Green indicates that commun
13. address usually an upper case letter qq Two digit number of EDS messages left in the guest queue nn Two digit number of characters in the message in the underlined section 00 if no message available there is no time stamp message number or data in this case tttttttt Eight digit message time stamp no punctuation with two digit hour two digit minute two digit second and two digit hundredths of a second fff Three digit message number Message numbers from 0 799 denote errors 800 899 are numberical data formats and 900 999 are successes ddddddd Variable length message data section For error and success messages typically a simple text message For numeric data formats a combination of ASCII decimal and hexadecimal characters digits with the format being determined by the particular message number cc Checksum described above ASCII charater 13 a carriage return 4 Set UT Commands the guest computer to set its clock to the Universal Time given in this command The control computers keep their clocks synchronized to GPS provided universal time in this way Command Format L4ttttttttccr Response Format L4er note that this response has no checksum L Guest computer address usually an upper case letter 16 SITE UTILITY CONTROL SYSTEM SOFTWARE USER MANUAL tttttttt Fight digit universal time no punctuation with two digit hour two digit minute two digit second and two digit hund
14. d state disk Resetting the computer insures that the system will start each time in the proper state When the program is loaded you should see the usual video display of site utility data You can type commands which appear at the prompt in the input panel At the top of the input panel the average and maximum cycle times for the program s main loop are displayed in milliseconds Status messages are displayed in the system message box The UT at which the message occurred is followed by a three digit message identification code A red LED indicates that the message describes error A green LED indicates that the message describes a normal condition or success Most errors are caused by serial communication errors or by some piece of remote equipment being turned off A certain number of errors may occur when the program is loaded before the serial communications are properly initialized A few errors will occur during normal operation The messages are numbered from 0 to 999 When the message buffer is full new messages are written over the old ones starting from the beginning so message 1000 11 SITE UTILITY CONTROL SYSTEM SOFTWARE USER MANUAL is written to location 0 and so on The most recent message is displayed in white You can scroll back and forth through the message buffer using the cursor keys To return to the page with the most recent message be sure to use End or else new messages will not appear on your scree
15. g hex 0 High Pressure 5 Fail 1 Freeze 5 Fail 2 High Pressure 6 Fail 3 Freeze 6 Fail 4 Fan 1 On 5 Fan 2 On Fan 3 On Fan 4 On Pump 1 On wo NI Pump 2 On 10 Pump 1 Fail 11 Pump 2 Fail 23 SITE UTILITY CONTROL SYSTEM SOFTWARE USER MANUAL cccc HVAC Chiller Pump flow mA 10 ie 123 12 3 ma int dddd HVAC Chiller Incoming temperature degrees C 10 ie 123 12 3 eeee HVAC Chiller Outgoing temperature degrees C 10 ie 123 12 3 f HVAC status bits hex int int 0 1 2 3 DGH g Com Error 0 OK 1 Error DGH h Com Error 0 OK 1 Error DGH i Com Error 0 OK 1 Error DGH j Com Error 02OK 1 Error 803 Telescope chiller information Format 803aaaabbbbccccddddeeeeffffg Telescope Chiller bit senses not yet known aaaa DGH n Reading hex 0 1 8 9 Telescope Chiller Remote On Off Compressor 1 On Off Compressor 2 On Off Compressor 3 On Off Compressor 4 On Off High Pressure 1 Fail Freeze 1 Fail High Pressure 2 Fail 10 Freeze 2 Fail 11 High Pressure 3 Fail 12 Freeze 3 Fail 13 High Pressure 4 Fail 24 SITE UTILITY CONTROL SYSTEM SOFTWARE USER MANUAL 14 Freeze 4 Fail bbbb DGH o Reading hex 4 Fan 1 On 5 Fan 2 On 6 Fan 3 On 7 Fan 4 On 8 Pump 1 On 9 Pump 2 On 10 Pump 1 Fail 11 Pump 2 Fail cccc Telescope Chiller Pump flow mA 10 ie 123 12 3 ma int dddd Telescope Chiller
16. ication is up red indicates an error As always if they re red power probably isn t on If communication is down some fields will not be displayed or will be displayed as question marks SITE UTILITY CONTROL SYSTEM SOFTWARE USER MANUAL Commands 3 Commands Summary All SITEUTIL commands begin with a command code followed by one or more arguments The arguments and the command must all be separated by spaces Letters may be upper or lower case The backspace key moves the cursor back one character at a time All commands are terminated by a cr Hit F1 for a quick command help screen 31 User Commands Turn HPU on or off when in remote mode ON OFF CHIL n m Set oil chiller n target temperature to m 1 2 m 0 0 30 0 C Set oil chiller to n MAN AUTO Tunnel fan command when in remote mode n ON OFF RESET or 0 0 60 0 fan speed in Hz LOUVER n Command tunnel fan louvers n OPN CLS HVAC n Turn HVAC Chiller on or off n ON OFF SITE UTILITY CONTROL SYSTEM SOFTWARE USER MANUAL TELE n Turn Telescope Chiller on or off n ON OFF COMP n m Set air compressor n to run mode m m RUN STOP LAG LEAD COMP n Set air compressor to n LOCAL REMOTE VP n Turn Vacuum Pump on or off n ON OFF This pump supplies vacuum for the M2 and M3 support Systems 3 2 Message Commands Command Description Scroll system message display back one line
17. munication with the host TCS was restored 994 Oil Chiller x error messages resumed Communication with the given oil chiller was restored Future com errors will be displayed again 995 Vent fan error messages resumed Communication with the Toshiba ventilation fan controller was restored Future com errors will be displayed again 996 DGH x error messages resumed Communication with the given DGH module was restored Future com errors will be displayed again 997 Screen dumped to SCREEN BMP The screen was captured and dumped to the file SCREEN BMP It can be viewed in Windows 999 Program startup vx xx First log entry after program startup with version number 27 SITE UTILITY CONTROL SYSTEM SOFTWARE USER MANUAL 7 Site Utility Control System differences between Magellan and II 28 SITE UTILITY CONTROL SYSTEM SOFTWARE USER MANUAL Troubleshooting 8 Troubleshooting 29
18. n although new messages will always be written to the message buffer The elapsed time in days that the program has been running is shown next to the ET entry and the current UT is shown as well The UT is set by the CMOS clock in the computer when the program starts but it is updated by the TCS as soon as communication is established and once per hour after that 12 SITE UTILITY CONTROL SYSTEM SOFTWARE USER MANUAL Serial Communication 5 Control System Serial Communication Standards There is always a host upstream computer and a guest downstream computer The host computer is frequently the TCS with the guest being Site Utility computer The host system sends a command and the guest responds immediately to that command Guest computers never broadcast without being queried which allows multiple guests to be chained on the same serial line Full command format Lnddddddddddccr The is the prompt character to initiate communication L is the guest computer s unit address in this case is Site Utility computer n is a command number d s are data specific to the command variable length cc is a checksum and r is a carriage return ASCII 13 Full response format Lndddddddccr 13 SITE UTILITY CONTROL SYSTEM SOFTWARE USER MANUAL The is the response character for guest computer responses L is the guest computer s unit address n is the command number this is in response to d
19. nter to the next EDS log entry Command Format L2r note that this command has no checksum Response Format L2qqnnttttttttfffdddddddccr L Guest Site Utility computer address usually an upper case letter qq Two digit number of EDS messages left in the guest queue nn Two digit number of characters in the message in the underlined section 00 if no message available tttttttt Eight digit message time stamp no punctuation with two digit hour two digit minute two digit second and two digit hundredths of a second fff Three digit message number Message numbers from 0 799 denote errors 800 899 are numberical data formats and 900 999 are successes ddddddd Variable length message data section For error and success messages typically a simple text message For numeric data formats a combination of ASCII decimal and hexadecimal characters digits with the format being determined by the particular message number cc Checksum described above ASCII charater 13 a carriage return 3 Repeat Last EDS Message Commands the guest computer to re send the last message it sent implying that the host computer had a serial communication error during the last reponse The guest s internal pointer should remain unchanged Command Format L3r note that this command has no checksum 15 SITE UTILITY CONTROL SYSTEM SOFTWARE USER MANUAL Response Format L3qqnnttttttttfffdddddddccr L Guest computer
20. ould be H Prompt The prompt character that the SITEUTIL program responds to This should be 10 SITE UTILITY CONTROL SYSTEM SOFTWARE USER MANUAL Response The response character that precedes all SITEUTIL replies This should be ClockPPM A number in parts per millionth of a second to speed up or slow down the system clock This should be used to match UT as closely as possible To set allow the TCS to set the SITEUTIL s UT several times over the course of many hours If the timestamps of the UT Set messages in the system log are ahead of the time being set increase ClockPPM by 1000000 amount ahead by in seconds time since last UT Set message in seconds otherwise decrease by the same amount This number will have to be modified if the computer being used to run the SITEUTIL program is changed Set this number to zero if you re unsure HPU Zero1500 HPU s oil level reading in inches when the oil level sensor reads 0 mV This and the following entry are used to calibrate the HPU s oil reservoir level display in inches by converting the reading from a DGH module Toggle the reading between mV and inches with the LEVEL command HPU Slope1500 Number of inches of oil per mV read on the oil level sensor 44 Starting the Program To start the SITEUTIL program push the reset button the black rocker switch just below the red power switch on the computer The program will load automatically from the soli
21. re run or else the tunnel heats up considerably The fan s status is displayed to the right of oil chillers onscreen Like the HPU it can be in either Remote or Local mode controlled by the Remote Local button on the Toshiba and either On or Off Below the tunnel fan title are displayed the current and requested fan speeds in hertz Below that is displayed the current state of the louvers either open or closed Note that the louvers only read as open when they re all the way open Thus they will say they are closed for some time after a LOUVER OPN command until they re all the way open The final line displays the current communication status with the Toshiba and DGH module d The word Toshiba will be red if communication is down green if its OK The DGH is displayed similarly If communication with either is down parts of the display will change to question marks indicating an unknown state Again the most likely cause for failed communication is that power is off 24 HVAC and Telescope Chiller Interface There are a pair of very large chillers a short way down the hill which supply a chilled glycol water mix to the facility The HVAC chiller supplies air conditioning units in the building while the telescope chiller supplies the primary mirror cooling system The status of these two systems are displayed in the top left panel In the first column to the right of each one s label is displayed whether the chiller is On or Off Note tha
22. redths of a second cc Checksum described above ASCII charater 13 a carriage return e Error flag 0 if an error occurred 1 if OK 9 Free form Command Sends the guest Site Utility computer a free form command typically similar to the commands entered via the guest computer s keyboard This is used to command moves homes etc Command Format L9nndddddddccr Response Format L9ennmmmmccr L Guest computer address usually an upper case letter nn Two digit number of characters in the message in the underlined section 00 if no message available ddddddd Variable length free form command section This section will contain a command parseable by the guest computer such as MOVE 1000 cc Checksum described above ASCII charater 13 a carriage return e Error flag 0 if OK 1 or higher if an error occurred mmmm Variable length diagnostic message such as Move ignored brake on This should be printed out by the host computer in the command input box if the command was given by the user or in the system log if the command was given by an automated routine in the host program nn 00 in the response if there is no diagnostic message 17 SITE UTILITY CONTROL SYSTEM SOFTWARE USER MANUAL 18 SITE UTILITY CONTROL SYSTEM SOFTWARE USER MANUAL Log Message System 6 Log Message System Last updated 7 14 99 Note that for error messages with an error code the error code is j
23. s are data specific to the response variable length cc is a checksum and r is a carriage return ASCII 13 For very short commands and responses the checksum may be omitted this is noted in the command description For all commands and responses that include a checksum the checksum is composed of two hexadecimal digits from 0 The checksum is calculated by starting with zero and XORing it with all characters in the message from the unit letter to the last data character before the checksum the underlined part of the command and response above Commands that are received but misunderstood checksum wrong unknown command etc are replied to like this L r Most guest computers maintain a running system log that contains important messages and all system status information Each also maintains a pointer into that log that keeps track of the oldest message that hasn t been sent to the host computer The 2 and 3 commands let the host computer command the guest computer to transmit one of its log entries or re transmit the last entry This is referred to as the Engineering Data Stream or EDS Command Summary 2 Query Next EDS Message 3 Repeat Last EDS Message 4 Set UT 9 Free form Command 51 Command Description 2 Query Next EDS Message 14 SITE UTILITY CONTROL SYSTEM SOFTWARE USER MANUAL Commands the guest computer to send its oldest un sent EDS log entry and advance its internal poi
24. t this indication is only valid if the chiller is in Remote mode set by a switch at the unit The second column displays which compressors are on green on black off The next two columns indicate high pressure failures or freeze failures red fail black OK In the lower part of the panel there is set of chillers related indications First is a display of which fans and pumps are energized green on black off There is then a pump flow display At the time of this writing the pump fluid flow display has not yet been calibrated so the reading is in mA instead of a more meaningful unit Next to be displayed are fluid temperatures in degrees C going into the chiller the first number C1 and exiting the chiller the second number C2 The last column displays the communication status with the four associated DGH modules If any of these are red indicating communication errors parts of the display will show question marks instead of values As usual communication errors usually indicate that power is not on SITE UTILITY CONTROL SYSTEM SOFTWARE USER MANUAL 25 Compressor Air Drier Interface The panel located at the top right of the screen displays the status of the air compressors and their associated air driers These units down the hill next to the HVAC and Telescope Chillers are used to supply clean dry pressurized air to the facility The two compressors are listed as Comp 1 and Comp 2 The two names are bl
25. ust used to find where in the program s source code the error occurred and is used to find bugs The system log in verbose mode should be used in most cases to diagnose strange problems Then just recreate the problem error message and hit the log dump function key There should be very explicit error messages that tell what was sent to devices and how they responded and what the program was expecting Errors 0 799 002 DGH x setup wrong got xxxxx expected The setup string of the DGH with address x on COMI was different than expected Setup the DGH to match the expected setup string with the TD or T3 commands If the expected setup string needs to be changed change it in the source code and recompile 003 DGH x com error n The DGH module with address x on COMI had a communications error Check communication with the TD command or put the log in verbose mode to see what is being said between the computer and the DGH The error number given helps pinpoint where in the source code the error occurred 004 DGH x error messages suspended The DGH module with address x on COMI had too many consecutive communication errors Further error messages will be suppressed 19 SITE UTILITY CONTROL SYSTEM SOFTWARE USER MANUAL 005 Fan command ignored communication down There are communication problems with DGH d so the given fan or louver command was ignored 006 Fan command ignored in local mode
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