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Omron CQM1H-SCB41 operation manual Connections to a Modem

Models: CQM1H-SCB41

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Page 83

Using Protocol Macros

Section 5-4

Connecting a Host Computer with NT-AL001-E Converting Link Adapters

Serial Communications
Board		RS-232CNT-AL001-E Link Adapter		NT-AL001-E Link Adapter	Computer
	Signal	Pin Shield Pin Signal	Signal Pin	Pin Signal Signal Pin	RS-232C Signal
	FG	NC	RS-422A
	FG	NC		NC	FG
	SD	SD		SD	SD
RS-232C	RD	RD		RD	RD RS-232C
RS-232C	RTS	RTS		RTS	RTS Interface
Interface	RTS	RTS		RTS	RTS Interface
Interface	CTS	CTS		CTS	CTS
	CTS	CTS		CTS	CTS
	5V	5V		5V
	DSR	DSR		DSR	DSR
	DTR	DTR		DTR	DTR
	SG	SG		SG	SG
D-sub, 9-pin		(See note)	Terminal block		D-sub, 9-pin
connector (male)		D-sub, 9-pin	Terminal block	Terminal block D-sub, 9-pin	connector (female)
		connector (male)		connector (male)	5-V (+)
					5-V (+)
		DIP Switch Settings		DIP Switch Settings	power (–)
		DIP Switch Settings		DIP Switch Settings
		Pin 1: ON		Pin 1: ON
		Pin 2: ON		Pin 2: ON
		(terminating resistance)		(terminating resistance)
		Pin 3: OFF (4-wire)		Pin 3: OFF (4-wire)
		Pin 4: OFF		Pin 4: OFF
		Pin 5: OFF		Pin 5: OFF
		Pin 6: ON		Pin 6: OFF

Note We recommend using the following NT-AL001-E Link Adapter Connecting Cables to connect to NT-AL001-E Link Adapters.

XW2Z-070T-1: 0.7 m

XW2Z-200T-1: 2 m

Connections to a Modem

	Serial Communica-
	tions Board
Modem	RS-232C port
FG	FG
SD	SD
RD	RD
RTS	RTS
CTS	CTS
DSR	5V
SG	DSR
CD	DTR
	SG
	D-sub, 9-pin
	connector (male)
ST2
RT
DTR
CI
ST1
D-sub, 25-pin
connector

72

Image 83

Omron CQM1H-SCB41 operation manual Connections to a Modem

Contents

Sysmac CQM1H Series Serial Communications Board  Omron Omron Product ReferencesAbout this Manual Name Cat. No ContentsTable of Contents Communications for 11 Data Links 107 Precautions Intended Audience General PrecautionsSafety Precautions Application Precautions Operating Environment PrecautionsXiv Conformance to EC Directives Conformance to EC DirectivesApplicable Directives ConceptsRecommended Mounting Method Recommended Ferrite CoresSection Serial Communications Boards FeaturesOverview Model NumberSystem Configuration Mounting Location Protocol OverviewSlave-initiated Communications Host Link ModeSending C-mode Host Link Commands Protocol Macros4 PC 11 Data Links No-protocol CommunicationsNT Links -- 11 Mode NT Links -- 1N ModeSerial Communications Board SpecificationsBasic Operating Procedure General SpecificationsBoard Components and Installation Component Names and Functions IndicatorsBoard Indicators Indicator Color Status Meaning2 RS-232C Port CPU Unit IndicatorsConnector Pin Layout Recommended Cables Applicable ConnectorsTions method Wire Wire, 1N Synchroniza 3 RS-422A/485 PortLabel Name Settings Factory setting SwitchesTerminating Resistance Switch Wire or 4-Wire Switch Mounting the Board InstallationMounting Height and Connector Cover Dimensions External DimensionsPrecautions in Handling the Board Recommended Cables RS-232C Cables WiringConnectors Standard Connectors For Both RS-232C RS-422A/485RS-422A/485 Cable Wiring PrecautionsReducing Electrical Noise for External Wiring WiringSection Pin Function Factory Setting Recommended RS-232C Wiring ExamplesModel Manufacturer CO-HC-ESV-3Px7/0.2 Hirakawa Hewtech Corp Recommended RS-422A/485 Wiring ExamplesWire Connections Recommended RS-422A/485 CableLength Model Using a 3G2A9-AL001 Link AdapterUsing an NT-AL001-E RS-232C/RS-422 Link Adapter Shield Connected to Hood FG Wiring ConnectorsCable Preparation Shield Not Connected to Hood FG Soldering Assembling Connector HoodConnecting to the Board Default Settings and Related Bits/Flags Contents Addresses PC Setup SettingsWords Bits Function Applicable Mode Word Bits Function Communications Modes Control Bits, Flags, and Status Information00 to Port Slot 1 Inner Board Error Code Hex Word Bits Function Inner Board Error FlagHost Link Communications TXD-- Instruction Host Link CommunicationsSimultaneous Usage of Both Ports Serial communications Features ModeHost Link Communications Host Link Specifications Application ProcedurePort Bits Default Function Setting PC-initiated Communications TXD-- Instruction Host-initiated Communications Host Link CommandsConnection Examples Port Configura Schematic diagram Tion RS-232CConnections Types of ConnectionRTS RS-232C Using NT-AL001-E Converting Link Adapters1N Connections Using RS-232C Ports Connections Using RS-422A/485 Ports 1N Connections Using RS-422A/485 Ports Board port Computer Network type Model Length Remarks Port Standard Cables from Board to Personal ComputerPreparing an RS-232C Cable for the Computer Format ProtocolNormal Response Frame FCS Frame Check Sequence Error Response Frame FormatComputer Communications SequenceExample Program for Using the TXD-- InstructionExample Programs TXD-- Application Example Communications Control Signals Communications TimingSetting a Transmission Delay Header code PC mode Name Host Link CommandsEnd Codes End Contents Probable cause Corrective measures CodeRS-232C Ports Changes from Previous ProductsFull-duplex transmissions that do not use Half-duplex transmissions that use CD2 RS-422A/485 Ports Protocol Macros Overview of the Protocol Macro Functions Protocol Macro Function Specifications Parameters Response Sequence contents Number of stepsStep common Per sequence Parameters Transmission ControlRetry count Step contents CommandsError processing Repeat counterUtes of ad Vari Description Message con ConTents Header Stant Terminator Data attrib Utes Con Data attrib StantBe traced Using the Protocol Macro FunctionUsing the Standard System Protocols SEND&RECEIVE Modifying Standard System ProtocolsStorage Memory Restrictions in Using the CX-ProtocolRestriction Procedure Select Transfer to PLC via Online or Port Bits Setting Function Using Standard System ProtocolsReceive Data Using User-created ProtocolsSend Data Transferring the created project to the Board Port Configuration Schematic diagram Connecting RS-232C Ports Connections to E5CK Controller Connections to a Modem DIP SW 485 RS-422A Terface Hood 3G2A9-AL001 Receive Protocol StructureParameter Meaning Sequence ParametersStep Parameters Level SettingLevel Possible changes in settings Port 1 Protocol Macro Execution Error Flag Board Identification Error Flag hardware errorProtocol Data Error Flag Port 2 Protocol Macro Execution Error FlagPort 1 Sequence Abort Completion Flag Word Bits Name and Function Classifi Set Reset CationPort 1 Communications Error Flag Port 2 Communications Error FlagPort 1 Executed Reception Case No. code Port 1 Protocol Macro Error CodePort 2 Protocol Macro Error Code Port 2 Tracing FlagPort 1 Shot Trace Start/Stop Bit Port 2 Restart BitPort 1 Continuous Trace Start/Stop Bit Port 2 Continuous Trace Start/Stop BitPort 1 Forced Abort Bit Port 1 Transfer Step Error Processing FlagPort 2 Transfer Step Error Processing Flag Port 1 Sequence END Completion FlagExecuting Communications Sequences Using Protocol MacrosPMCR-- Instruction Specifications Error CodesPMCR-- Operation FlagsFirst Receive Data Storage Word DProgramming Example Ladder Program StructureOperand Areas and Address Ranges Receive Word Allocation for Sequence No Present Value Read Ladder Program ExampleConnections Send Word Allocation for Sequence No Present Value ReadOperand Settings for the PMCR-- Instruction Ladder Programming Example Precaution on Reception Failures for PmcrTransmission Methods Baud rate b/s Lag time ms Error Flags for Overrun, Framing, and Parity ErrorsTime Lag t1 Processing When a Sequence Ends Abnormally Example Precautions on Using the Force Abort Bit No-protocol Communications Specification No-protocol SpecificationsStart code End code Yes Send/Receive Message Frames100 Connecting to a Bar Code Reader via RS-232C Control Word C Using No-protocol CommunicationsTransmit TXD-- in No-protocol Mode Transmit TXD-- and Receive RXDReceive RXD-- in No-protocol Mode RXD-- Communications Procedure TXD-- Communications ProcedureConditions PC SettingsComputer Settings Application ExampleCommunications for 11 Data Links OverviewSection PC Setup SettingPort Bits Function Setting Starting Data LinksSpecifications Overview Conditions Using 11 Data LinksMaster PC Settings Slave PC SettingsNT Link Communications Overview of NT Links NT Links 1N ModeNT Links 11 Mode Precautions115 NT Link Settings for 11 Mode NT Link Settings for 1N Mode117 118 Troubleshooting and Maintenance Indicators Possible cause Remedy Board CPU Unit Front-panel Indicator Error DisplaysSerial Communications TroubleshootingBoard Error Information 122 123 124 Board ReplacementSection 126 Not perform Error Indicator Error details Cause Remedy Code128 3 1N NT Link Mode Cleaning Cleaning and InspectionInspection Items InspectionMaterials Required Daily Materials Required OccasionallyReplacement Procedure Board ReplacementSettings after Replacing the Board Protocol Macros Designed with CX-Protocol Example Using Standard System ProtocolsProcedure IntroductionProtocol name Function Standard System ProtocolsReceive Data Word Allocation 4th Operand CompoWay/F System Configuration for Standard System ProtocolCompoWay/F Master Protocol Command Format Communications SpecificationsTransmission Procedure Command and Response FormatsAppendix B Command Frame ContentsResponse Frame Contents End code Name Meaning Command FrameCommand Data contents Code ExampleResponse Text Command and TextVariable type Contents Example Variable Area ReadStructure of the Protocol CompoWay/F Master Protocol SequencesResponse Frame CompoWay/F Message Frames and PMCR260 OperandsSend with Ascii Conversion, with Response Sequence No Receive Data Word Allocation 3rd Operand of PMCR260 Send Data Word Allocation 2nd Operand of PMCR260145 Broadcast with Ascii Conversion, No Response Sequence No Send with No Conversion and with Response Sequence No Broadcast with No Conversion and No Response Sequence No 149 150 RS-232C ConnectionsRS-485 2-wire Connections RS-422 4-wire ConnectionsE5jK Digital Controller Read Protocol Appendix CRS-485 Connection Connection ConfigurationRS-232C Connection Send Data Word Allocation 2nd Operand of Pmcr Read Process Value Sequence NoRead Set Point during SP Ramp Sequence No Appendix CRead Set Point Sequence No Read Alarm Value Sequence NoRead MV Sequence No Read Cooling Coefficient Sequence No Read Dead Band Sequence No Read Manual Reset Value Sequence NoRead SP Ramp Time Unit and Set Value Sequence No Read Hysteresis Sequence NoRead Control Period Sequence No Read LBA Detection Time Sequence No Read MV Limits Sequence No Read MV at Stop Time and at PV Error Sequence No.013Read Input Shift Limits Sequence No Read Alarm Hysteresis Sequence NoRead Input Digital Filter Sequence No Read Level 0 Parameters Sequence No Read Level 1 Parameters 1 Sequence No Read Level 1 Parameters 2 Sequence No 166 Read Level 2 Parameters 1 Sequence No Read Level 2 Parameters 2 Sequence No 169 General-purpose Read Sequence No E5jK Digital Controller Write Protocol Appendix DWrite Set Point Sequence No Write Alarm Value Sequence NoWrite Hysteresis Sequence No Write Manual Reset Value Sequence NoWrite Cooling Coefficient Sequence No Write Dead Band Sequence NoAppendix D Write Control Period Sequence NoWrite SP Ramp Time Unit and Set Value Sequence No Write MV Limits Sequence No Write MV at Stop Time and at PV Error Sequence NoWrite LBA Detection Time Sequence No Write Input Shift Value Sequence No Write Alarm Hysteresis Sequence NoWrite Input Digital Filter Sequence No Write Level 0 Parameters Sequence No Write Level 1 Parameters 1 Sequence No Write Level 1 Parameter 2 Sequence No Write Level 2 Parameters 1 Sequence No Write Level 2 Parameters 2 Sequence No General-purpose Write Sequence No Switch to Level 0 Software Reset Sequence NoRemote/Local Sequence No Run/Stop Sequence NoExecute/Cancel AT Sequence No Software Reset Sequence No Switch to Level 1 Sequence NoAppendix E E5ZE Temperature Controller Read ProtocolRS-232C Connections Signal name Signal direction Pin No Brevi AtionRS422/485 Connections RS-485 Pin No Signal name Abbreviation Signal directionRS-422A Appendix EBaud Rate DIP Switch Switch SettingsCommunications Parameter DIP Switch Unit Number Switch192 Read Output Values Sequence No Read Set Point, Process Value, and Output Value Sequence No 195 196 Read Alarm Mode Sequence No Read Output Mode Sequence NoRead Alarm Temperatures Sequence No Read Operation Status Sequence No Read Setting Unit Sequence No Read Error Status Sequence NoRead Input Shift Value Sequence No Read Ramp Value Sequence No Read Output Value Limit Sequence No Read Present Set Point Sequence NoRead Output Value Change Rate Limit Sequence No Read HB Alarm and HS Alarm Valid Channels Sequence No Read Heater Current and SSR Leakage Current Sequence No.121 Read Dead Band/Overlap Band Sequence No 208 Appendix F E5ZE Temperature Controller Write ProtocolWrite Set Point Setting Unit 1 Sequence No Write Set Point Setting Unit 0.1 Sequence No 212 213 Write Alarm Mode Sequence No Write Output Mode Sequence NoWrite Alarm Temperature Setting Unit 1 Sequence No Write Alarm Temperature Setting Unit 0.1 Sequence No Start Autotuning Sequence No Write Setting Unit Sequence No Cancel Autotuning Sequence NoAppendix F Write Manual Output Value Sequence No Write Ramp Value Sequence NoWrite Output Value Limit Sequence No Write Output Value Change Rate Limit Sequence No Initialize Settings Sequence No Save Settings Sequence NoWrite HB and HS Alarm Valid Channels Sequence No Write Dead Band/Overlap Band Sequence No Stop Operation or Control Sequence No Start Control Sequence NoStart Manual Operation Sequence No Appendix G E5jJ Temperature Controller ProtocolRS422A/485 Connections Signal name Abbreviation Signal direction Pin NoAppendix G Input Signal groundSelect RAM Write Mode Sequence No Select Remote Mode Sequence NoSelect Local Mode Sequence No Select Backup Mode Sequence NoWrite Parameters 1 Sequence No Save Set Point Sequence NoWrite Parameters 2 Sequence No 235 Read Parameters 1 Sequence No Read Parameters 2 Sequence No 238 Read Set Point Limit Sequence No Read Output Value Sequence NoRead Initial Status Sequence No Read Heater Current Sequence No241 242 ES100j Digital Controller Protocol Appendix HAppendix H RS-422A/485 Connections Appendix HRead Event Data Sequence No Read Time Signal Sequence No Read Error Detection Data Sequence No 249 Read Heater Burnout Data Sequence No Read PV Data Sequence No Read SP Data Sequence No Read MV Data Sequence No Read Control Monitor Data Sequence No 255 Read Adjustment Parameters Sequence No 257 258 Write Adjustment Parameters Sequence No Read PID Control Parameters 1 Sequence No 261 Read PID Control Parameters 2 Sequence No 263 Write PID Control Parameters 1 Sequence No 265 Write PID Control Parameters 2 Sequence No Read Local SP Sequence No 268 Write Local SP Sequence No Read Program Parameters Sequence No 271 Write Program Parameters Sequence No Remote Setting Mode Sequence No External Setting Mode Sequence No Local Setting Mode Sequence NoRun Command Sequence No Auto Mode Sequence No Reset Stop Sequence NoExecute A.T. Sequence No Manual Mode Sequence NoCancel A.T. Sequence No Change Bank No. Sequence No Change Pattern No. Sequence NoRead Controller Status Sequence No General-purpose Command Sequence No 282 Protocol Configuration K3Tj Intelligent Signal Processor ProtocolSend word Receive word Allocation Ladder Interface SettingsAppendix Sequence Communications Function Ladder interfaceSignal name Abbreviation Pin No Direction K3T j Intelligent Signal Processor Protocol Inverting output Input or output Non-inverting output Signal name Abbreviation Signal direction TerminalReset Control Continuous Units Sequence No Reset by Unit Number Sequence No289 Write Set Value with Bank by Unit Number Sequence No Write Set Value H Continuous Units Sequence NoWrite Set Value L Continuous Units Sequence No Write Set Value LL Continuous Units Sequence NoWrite Set Value HH with Bank Continuous Units Sequence No Write Set Value O5 with Bank Continuous Units Sequence No Write Set Value H with Bank Continuous Units Sequence NoWrite Set Value L with Bank Continuous Units Sequence No Write Set Value LL with Bank Continuous Units Sequence NoRead Set Value by Unit Number Sequence No Write Set Value O2 with Bank Continuous Units Sequence NoWrite Set Value O1 with Bank Continuous Units Sequence No Read Set Value LL Continuous Units Sequence No Read Set Value HH Continuous Units Sequence NoRead Set Value H Continuous Units Sequence No Read Set Value L Continuous Units Sequence NoRead Set Value with Bank by Unit Number Sequence No Read Set Value LL with Bank Continuous Units Sequence No Read Set Value HH with Bank Continuous Units Sequence NoRead Set Value H with Bank Continuous Units Sequence No Read Set Value L with Bank Continuous Units Sequence NoRead Holding Data Sequence No Read Set Value O3 with Bank Continuous Units Sequence NoRead Set Value O2 with Bank Continuous Units Sequence No Read Set Value O1 with Bank Continuous Units Sequence NoRead Holding Data PH Continuous Units Sequence No Read Display Value PV by Unit Number Sequence No Offset Contents DataRead Holding Data BH Continuous Units Sequence No 300 Model Data Read by Unit Number Sequence No Read Display Value PV Continuous Units Sequence NoModel Data Read Continuous Units Sequence No 303 V500/V520 Bar Code Reader Protocol Appendix JAppendix J V520 Connections V500 ConnectionsV520-R121 System SettingV500-C11 BCR Functions Host InterfaceComplete Data Read Sequence No BCR Read Start Sequence NoBCR Read Stop Sequence No Data Read Sequence NoCODE93 BCR Function Write V500 Sequence NoBCR Function Read V500 Sequence No Log Data Output Request V500 Sequence No BCR Connection Confirmation V500 Sequence No Preset Data Set V500 Sequence NoBCR Initialize V500 Sequence No Log Data Clear V500 Sequence NoData Continuous Read Scan V500 Sequence No Data Continuous Read Interrupt V500 Sequence NoData Continuous Read Interrupt V520 Sequence No General-purpose Command 1 Sequence NoGeneral-purpose Command 2 Sequence No Receive Data Storage Word Allocation 3rd Operand of Pmcr Appendix J3Z4L Laser Micrometer Protocol Appendix KAppendix K 319 Setting Status DIP Switch Settings3Z4L-3000 Series DIP Switch 3Z4L-4000 Series DIP Switch3Z4L-3000 Series Delimiter Control Code Setting 3Z4L-4000 Series322 Mm Unit Set Sequence No Memory Switch Set Sequence NoOffset Contents Data Data format Series 3Z4L Clear Sequence NoCalibration Release Sequence No Calibration Set Sequence NoMeasurement Condition Set 3000-series Sequence No Program Number Set 3000-series Sequence No326 327 Measurement Condition List Request 3000-series Sequence No Measurement Condition Release 3000-series Sequence No329 330 Continuous Measurement Start Scan 3000-series Sequence No Single Run Measurement Start 3000-series Sequence NoZero Run Measurement Start 3000-series Sequence No Statistic Processing Execution 3000-series Sequence No Measurement Termination 3000-series Sequence NoData Request 3000-series Sequence No Statistic Result Request 3000-series Sequence No Statistic Processing Non-execution 3000-series Sequence NoAll Statistic Memory Clear 3000-series Sequence No Statistic Processing Memory Clear 3000-series Sequence NoAppendix K Offset Contents Data Data formatMemory Switch Set 1 3000-series, High-speed Type Sequence No Memory Switch Set 2 3000-series, High-speed Type Sequence No 337 338 3Z4L Initialize 3000-series Sequence No Measurement Condition Set 4000-series Sequence No 341 Measurement Condition List Request 4000-series Sequence No Measurement Condition Release 4000-series Sequence NoSingle Run Measurement Start 4000-series Sequence No Continuous Measurement Start Scan 4000-series Sequence No Deflection Measurement Start 4000-series Sequence NoForced Negative Zero 4000-series Sequence No Continuous Measurement Termination 4000-series Sequence NoData Request 4000-series Sequence No Forced Positive Zero 4000-series Sequence NoGeneral-purpose Command 1 4000-series Sequence No General-purpose Command 2 4000-series Sequence No Visual Inspection System Protocol Appendix LAppendix L For RS/CS Flow Control Pin No Signal name AbbreviationContinuous Measurement Execution Scan F200 Sequence No Offset Content data format DataMeasurement Execution F200 Sequence No Continuous Measurement Execution Interrupt F200 Sequence No Evaluation Condition Change F200 Sequence No Reference Object Registration Group F200 Sequence NoReference Object Registration Criterion F200 Sequence No Arbitrary Measurement Value Acquisition F200 Sequence No Measurement Execution F300 Sequence No Continuous Measurement Execution Scan F300 Sequence No 358 Continuous Measurement Execution Interrupt F300 Sequence No 360 Measurement Execution and Positioning F350 Sequence No Illumination Fluctuation Follow Execution F300 Sequence NoCamera Designation and Positioning F350 Sequence No Scene Switching and Positioning F350 Sequence NoCamera Change Decrease by 1 F200/300 Sequence No Camera Change Increase by 1 F200/300 Sequence No Reset F200/300 Sequence NoScene Switching Decrease by 1 Sequence No Scene Switching Increase by 1 Sequence NoMeasurement, Inspection Termination Sequence No Scene Switching Arbitrary Sequence NoGeneral-purpose Command Send Sequence No General-purpose Command Send/Receive Sequence No366 V600/V620 ID Controller Protocol Appendix MAppendix M 369 RS-422A Connections DIP Switch V600/620-CD1D DIP Switches372 V600-CAjA DIP Switches Read ASCII/1 Sequence No Read ASCII/2 Sequence No Read ASCII/4 Sequence No Read ASCII/8 Sequence No Read Hexadecimal/1 Sequence No Read Hexadecimal/2 Sequence No Read Hexadecimal/4 Sequence No Read Hexadecimal/8 Sequence No Auto-read ASCII/1 Sequence No Polling Auto-read Ascii Sequence No Auto-read Hexadecimal/1 Sequence NoPolling Auto-read Sub-command ASCII/8 Sequence No Polling Auto-read Sub-command ASCII/2 Sequence NoPolling Auto-read Sub-command ASCII/4 Sequence No Polling Auto-read Hexadecimal Sequence No Polling Auto-read Sub-command Hexadecimal/2 Sequence NoWrite ASCII/1 Sequence No.518 Polling Auto-read Sub-command Hexadecimal/4 Sequence NoPolling Auto-read Sub-command Hexadecimal/8 Sequence No.517 Write ASCII/2 Sequence No 388 Write ASCII/4 Sequence No Write ASCII/8 Sequence No Write Hexadecimal/1 Sequence No Write Hexadecimal/2 Sequence No Write Hexadecimal/4 Sequence No Write Hexadecimal/8 Sequence No Polling Auto-write ASCII/2 Sequence No Auto-write ASCII/1 Sequence NoAuto-write Hexadecimal/1 Sequence No Polling Auto-write ASCII/4 Sequence No Polling Auto-write Subcommand ASCII/2 Sequence NoPolling Auto-write Subcommand ASCII/4 Sequence No Polling Auto-write Subcommand ASCII/8 Sequence NoPolling Auto-write Hexadecimal/4 Sequence No Polling Auto-write Subcommand Hexadecimal/2 Sequence NoPolling Auto-write Subcommand Hexadecimal/4 Sequence No Polling Auto-write Hexadecimal/2 Sequence NoData Check Sequence No Polling Auto-write Subcommand Hexadecimal/8 Sequence NoPolling Auto-write Hexadecimal/8 Sequence No Control Sequence No Command Processing Cancel Sequence No Error Information Read Sequence NoPolling Auto-write Command Processing Cancel Sequence No Polling Auto-read Command Processing Cancel Sequence No402 Appendix N Hayes Modem AT Command ProtocolCompatible Modems Modem Settings Dialling Operand and Word Settings of PmcrSetting Example Password VerificationOperand Password Verification OperationData Send/Receive Communication Errors Escape ModeHang Up Command Numbers Index 413 414 415 416 417 Original production Revision code Date Revised contentRevision History Authorized Distributor