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High -LevelHigh -Level Low-LevelLow - LevelSingle - EndedDifferential Non-Thermocouple DifferentialInputs Inputs Differential Inputs Inputs1828-1 or 21851-1' 1851-1 1851-2Standard Standard ThermocoupleTerminal* Terminal* Terminal*Signal Signal SignalConditioning Conditioning ConditioningElements Elements ElementsSol id-StateMultiplexer(Max .256Points)Relay Multiplexer (Max. 1024 Points)DifferentialAmplifierDifferentialAmplifierSolid-State Solid-State Solid-State Solid -StateBlock Switch Switch Switch Switch* With CurrentElementas RequiredMaximum16 Input Paths--- 1826-1 1 80 1/1802/1827T1I Al ExpanderI Al Basic I(All Features Repeated) External SyncData Channel1'AdapterData Channel' `Adapter 2$ InBusfrrnmrnmmmairmiv+mfmay+P-CAnalog Digital SwavAw■4 I 14000EFigure 31. Analog Input Configuration92
1851 MULTIPLEXER TERMINAL, MODEL 2: Thisterminal is similar to the model 1. However, amaximum of 62 multiplexer points is allowed, anda cold junction is provided for direct connection ofthermocouples. A cold-junction temperature indicatordevice (resistance bulb thermometer) is includedin the terminal.MULTIPLEXER (RELAY): This multiplexer (Mpx/R) provides switching for both high-level differentialinputs and low-level differential inputs, allowing allMpx/R inputs to use a common ADC.MULTIPLEXER (SOLID STATE): This multiplexer(Mpx/S) is a solid state, high-level single-endedmultiplexer. Mps/S provides high-speed switchingof analog input signals to allow use of a commonADC.MULTIPLEXER OVERLAP: This feature allowsoverlap of solid state and relay multiplexing.MPX /R CONTROL AND MPX/R CONTROL ADDI-TIONAL: These features provide the control circuitrynecessary to operate the Mpx/R points. Eachfeature can control up to 256 points.MPX/S CONTROL: Control circuitry to operate theMpx/S points is provided by this feature.DIFFERENTIAL AMPLIFIER: This is a time-sharedamplifier which raises each low level signal to thevolt level of the ADC. Up to 256 Mpx/R pointscan use the same amplifier. The differential amplifiermay be assigned one of the following ranges:±10 mV, ±20 mV, 150 mV, 1100 mV, ±200 mV, or±500 mV.ADC MOD 1: This ADC converts analog signals (±5volt range) to digital values (8, 11, or 14 bits plussign).ADC MOD 2: This ADC is similar to ADC Mod 1but includes a sample-and-hold amplifier for increasedconversion rates.AI DATA CHANNEL ADAPTER 1: This adapterallows sequential reading of input points by meansof data channel (cycle steal) operations with oneXIO initialize read.AI DATA CHANNEL ADAPTER 2: This adapter, inconjunction with adapter 1, allows random readingof input points via data channel (cycle steal) operationswith one XIO initialize read and one XIO initializewrite.COMPARATOR: The comparator performs rangechecking on digital values developed by the ADC.The high and low limits are selectively obtainedfrom the processor-controller for checking. Whenthese values are determined to be out of limit, aninterrupt informs the P-C. Only one P-C cycle isrequired for each value to be limit checked.ANALOG INPUT EXPANDER: Allows a completeanalog input system to be configured around the1826 Data Adapter Unit. Thus, a second ADC orsimply a remotely located ADC may be added to any1800 system.MULTIPLEXER/R AND MULTIPLEXER/S MAXI-MUMS AND RANGES: Althrough the maximum numberof Mpx/R points and Mpx/S points is 1,024 and256, respectively, both maximums cannot be installedwithin the same system. The simultaneousmaximums for each system are dependent upon thenumber of analog input ranges as shown in Figure 32.IBM 1851 MULTIPLEXER TERMINALThe 1851 Multiplexer Terminal is a modular chassisin which multiplexing and signal conditioning featurescan be mounted. The 1851 terminals are mounted inan 1828 Enclosure. Up to 19 terminals can be includedfor any one ADC in a system. Mpx/R andMpx/S cannot be installed in the same 1851 terminalunit.Two models of the multiplexer terminal areavailable. The model 1 provides facilities for up to64 multiplexer points in groups of 16 points. Customerwires are terminated on screw-down terminals.The signal matching elements are available for eachmultiplexer terminal. Up to two differential amplifierscan also be mounted in each terminal.The model 2 is modified to allow for thermocoupletermination, cold junction thermal stabilization,and a resistance bulb thermometer (RBT)circuit. These elements are used to determine coldjunctiontemperature. Thus, thermocouple wirescan be connected directly to the terminals, and thecold-junction temperature can be computed by theP-C.The first two multiplexer addresses installed ina model 2 are used for the cold-junction signal measurement:00 is RBT reference; 01 is RBT bridgeoutput. These two signals should be read at intervalswhich are small compared with significantambient temperature change intervals. Separatereadings are required for each model 2.Since the first two addresses are used for thecold junction, a maximum of 62 input points areAnalog Input 93
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File No. 1800-01Order No. GA26-5918
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ContentsINTRODUCTION 1SYSTEM DESCRI
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Thermocouple Conversion ExampleConv
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Status Character 2412790 ADAPTER PR
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Processor - ControllerCoreStorageOu
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Page of GA26-5918-8Revised July 14,
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egister or the index register speci
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Short InstructionDDOne WordInstruct
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Instruction SetThe 1800 system inst
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LOAD ACCUMULATOR (LD)FORMATS oitamw
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STORE ACCUMULATOR (STO)FORMATSF 0 O
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LOAD INDEX (LDX)0 OP F T Disp 151 0
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STORE STATUS (STS) Store Status Fun
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LOAD STATUS (LDS)117165 A1DESCRIPTI
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SUBTRACT DOUBLE (SD).fartzaielTmEas
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DIVIDE (D)FORMATS0 OP F T DispF T I
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LOGICAL EXCLUSIVE OR (EOR)'FORMATS
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SHIFT LEFT A AND Q (SLT)altkae..,.:
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SHIFT RIGHT LOGICAL A (SRA)FORMAT s
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ROTATE RIGHT A AND Q (RTE)FORMAT ta
Page 50 and 51: BRANCH OR SKIP ON CONDITION (BSC OR
Page 52 and 53: a4.-4KA4rE4.7.9.4.&.4VA/M4:14/24...
Page 54 and 55: ',V.71..1.41VV4-02,P2A,V4,1%1,L—N
Page 56 and 57: COMPARE (CMP)FORMATS0 OP F T Disp 1
Page 58 and 59: Page of GA26-5918-8Revised July 14,
Page 60 and 61: MachineCyclesAUGEND (A-reg) and ADD
Page 66 and 67: chain is accomplished as follows: T
Page 74 and 75: InterruptTo allow for coordination
Page 80 and 81: After a request for service has bee
Page 82 and 83: 2. The forced BSI with indirect add
Page 84 and 85: Storage ProtectionStorage protectio
Page 86 and 87: Page of GA26-5918-8Revised January
Page 88 and 89: Processor-Controller ConsoleThe pro
Page 90 and 91: 117674,Figure 23. Console Pushbutto
Page 96 and 97: DATA FLOW DISPLAYSSix rows of light
Page 98 and 99: This command causes the console int
Page 104 and 105: CUSTOM ELEMENT: This element is ava
Page 106 and 107: The clock stop period does not dire
Page 108 and 109: Numberingwithin 18511851's withMult
Page 110 and 111: selected analog signal to a digital
Page 114 and 115: 0 1 2 3 4 5 8 7 0 9 10 14 15Indicat
Page 116 and 117: Direct Program Control Operations P
Page 118 and 119: Temp TempF C1652° 9001472° 81292
Page 120 and 121: 2. Determine the ADC reading (Q val
Page 122 and 123: Digital InputDigital input features
Page 124 and 125: ead operation without external sync
Page 126 and 127: AdapterFirstSecondThirdFourthFifthS
Page 128 and 129: the next input group address (conta
Page 130 and 131: status word (PISW), the PISW is rea
Page 132 and 133: ProcessorControllerOut Bus(16 - Bit
Page 134 and 135: DAC reference voltage used in devel
Page 136 and 137: 126 is assigned to the second group
Page 138 and 139: The input/output control command (I
Page 142 and 143: 1053/1816 Printer IOCC'sCE ModeSpec
Page 144 and 145: Keyboard entries are not printed au
Page 146 and 147: error is detected, the program may
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Channel••• ••••• 14
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READER ANY ERROR: This indicator tu
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Even-Numbered ColumnsOdd-Numbered C
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1442 DSW Interrupt IndicatorsFigure
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The preceding examples show that if
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CharHexCore Storage BitsTypebar2 5
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CE PRINTER BUSY: When the 1443 is i
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DrumDownDRUM FAST RUN: This switch
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1627 DSW Noninterrupt IndicatorsFig
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120255A1Each track is divided into
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This command places the disk storag
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ANY ERROR: This indicator turns on
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LogicalDataRecordIBGapLRCIBGap.._01
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A tape mark read from seven-track t
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Modifier bits perform the five func
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an XIO initialize read operation wi
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Communications AdapterINTRODUCTIONT
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character (bit positions 0 through
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Bit PositionsP, 7, 6, 54, 3, 2, 100
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Standard replies as well as NAK cau
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either seeking characters received
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CA IOCC'sInitialize Write0 15 0 4 8
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TIMEOUT: This indicator turns on, c
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0 I 2 3 4 5 6 7 8 9 10 11 i2 13 14
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ETB, ETX, AND ENQ: These characters
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.■••.0■-3toCOc.nroz0F21.0fa
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Selector ChannelThe selector channe
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CCW Word 1 CCW Word 2 CCW Word 315B
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limited to the number of sense byte
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CSW Word 1 CSW Word 2 CSW Word 3 CS
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CSW Word 2 CSW Word 3CSW Word 40 3
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Termination of an operation with a
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Device end, when subsequently provi
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System /360 AdapterINTRODUCTIONThe
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specified by the channel command wo
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ATTENTION: This status indicates th
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HALT: This bit turns on, causing an
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Start Byte AS Address Byte Device A
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Read data request causes the adapte
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If a 1053 Printer is addressed by t
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specific 16-word block within the c
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LCCBWord1Address Word(Active Frame)
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channel active is interrogated. If
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Form GA26-5918-8Page Revised 10/1/7
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AREA STATION LOCAL I/O TRANSACTION
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244Form GA26-5918-8Page Added 10/1/
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When all segments are bypassed modi
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0. It can occur only during a read
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HexadecimalValueDouble Compare (DCM
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Appendix B. I/O Device AddressingTh
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1054 AND 1055 PAPER TAPEWRITE: Punc
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INITIALIZE WRITE: Move contents of
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INITIALIZE READ: Move tape data to
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AREA FEATURE 0 1 2 3 4 5 6 7 8 9•
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Clear (Continued)Storage (Continued
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Converting Thermocouple Characteris
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4Input/Output Control (Continued)On
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Loop Channel (Continued)Control Blo
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Pulse OutputDescription of 125Timer
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Storage ProtectBit (S) 10Bit Light
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1053 Printer (Continued)Maximum Rat
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1810 Disk Storage (Continued)Read/W
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IBM Technical Newsletter File Numbe
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^;``
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• READER'S COMMENT FORM•▪ IBM
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• READER'S COMMENT FORM• IBM 18
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• READER'S COMMENT FORM• IBM 18
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