1747-6.22, Backup Scanner User Manual

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7-120 RIO Block Transfer Publication 1747-6.22 Control Flag EN TO Status Flag EW ST ER DN SLC Control Program Cancelling a Block Transfer Prior To Transmission Across RIO Link 1 1 2 M0 Control Information M1 Status Information 3 5 SLC Control Program Canceling a BT Prior to Transmission Across RIO Link In this example, the SLC control program cancels a BT that has been pending (EW = 1, ST = 0) for a specific amount of time. 1. When the SLC control program detects that the EW has set, a timer in the SLC control program starts. 2. If the timer expires before the scanner begins transmitting across the RIO link (ST = 1), then the SLC control program sets the TO flag. Note that the cancellation will not occur until all previously scheduled BTs to the same logical rack have been completed (i.e., when the ST bit would normally have been set). 3. The scanner fills in the error code field and sets the ER flag. Also, the ER bit is not set until any previously pending BTs to that device have been completed. The SLC control program must clear the EN flag to complete the BT operation. Note that because of the asynchronous nature of cancelling a device that has a BT in progress, the BT reply may indicate either a successful completion or an error. 4. The SLC control program clears the TO and EN flags. Note that if the SLC control program later attempts to initiate another BT and the TO flag is still set, the scanner will ignore the BT request. 5. Finally, the EW, ST (if set) and ER bits are reset. 4 4 5 5
Bit Number Octal 17 10 7 Bit Number Decimal 15 8 7 Logical Rack 0 Word 0 Word 1 Word 2 Word 3 Word 4 Word 5 Word 6 Word 7 Primary I/O Image 0 0 RIO Block Transfer 7-121 Below are points to consider when implementing BT operations: • The minimum amount of scanner image that can be assigned to a device on the RIO link is 1/4-logical rack in the G file configuration. This allows up to four separate devices per logical rack. Each device could have a maximum of four BTs configured to it. Thus, up to 16 BTRs and/or 16 BTWs could be assigned to each logical rack. • If a BT device is a 1747-ASB RIO Adapter, then multiple SLC 500 modules (such as analog modules) could be scanned by the 1747-ASB and the data block transferred to the RIO scanner. Since the RIO network handles one BT request per logical rack at a time, there will be a delay before all devices in the 1747- ASB rack can be accessed. Therefore you should only perform BTs as necessary (i.e., “on demand”). • Inhibiting a device on the RIO network (via control words M0:e.8...11) precludes that device from block transfer operations. Attempting to initiate a BT to an inhibited device results in an error reply. The scanner cancels a BT that is in progress if it detects that the device is inhibited. Because of the asynchronous nature of inhibiting a device that has a BT in progress, the BT reply may indicate either a successful completion or an error. In either case, the SLC control program must still clear the Enable flag. • All M0 and M1 BT buffers are cleared (set to all zeros) after a power cycle and when the SLC processor goes from Program to Run mode, Program to Test mode, or Test to Run mode. When using complementary I/O, if you configure a complementary device to use more I/O image space than an associated primary device, then block transfers can only be performed to locations in the complementary device that have associated I/O image space in the primary device. For example, if a primary device is 1/2 logical rack and a complementary device is a full logical rack, block transfers can be performed only in the first 1/2 logical rack of the complementary device. Attempting block transfers in the last half of the complementary device results in a BT error (error - 11 - device not configured). 1/2 logical rack configured and usable 1/2 logical rack not configured Bit Number Octal 17 10 7 Bit Number Decimal 15 8 7 Word 0 Word 1 Word 2 Word 3 Word 4 Word 5 Word 6 Word 7 Logical Rack 8 Complementary I/O Image 0 0 1/2 logical rack configured and usable 1/2 logical rack configured, but not usable for BT since Words 4-7 are not configured for the primary device. Publication 1747-6.22
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Backup Scanner 1747-BSN User Manual
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Overview Table of Contents Preface
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Scanner Configuration and Programmi
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Switchover Considerations Programmi
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Glossary Index Table of Contents xi
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Who Should Use This Manual How to U
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Conventions Used in This Manual The
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Overview This chapter contains the
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Local I/O Remote I/O Processor I/O
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SLC and Scanner Asynchronous Operat
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RIO Logical Rack 0 RIO Logical Rack
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Physical and Logical RIO Link Speci
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Overview 1-27 Complementary I/O: Pl
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Overview 1-29 Complementary I/O: Pl
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Slot Pair I O I O I O I O 0 1 2 3 4
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Hardware Features Overview 1-33 Not
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Module Address Switch Overview 1-35
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A Typical SLC 500 Backup Configurat
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Overview 1-39 Data table values are
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Required Tools and Equipment Chapte
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5. Configure the system. Quick Star
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Configuration Selection Installatio
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Backup Scanner Installation Install
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Installation and Wiring 3-49 Termin
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Chapter 4 Operating Your SLC 500 Ba
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(1) Operating Your SLC 500 Backup S
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Operating Your SLC 500 Backup Syste
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Startup Sequencing Operating Your S
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Understanding Remote Input and Outp
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Scanner Configuration and Programmi
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Rules for Configuring the Scanner G
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Logical Rack 0 Logical Rack 1 Logic
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Considerations When Configuring Rem
Page 67 and 68: Scanner Configuration and Programmi
Page 69 and 70: Output Reset Control Device Inhibit
Page 71 and 72: M0 File - RIO Device Reset Control
Page 75 and 76: M1 Status File Description General
Page 77 and 78: Logical Device Starting Address Sta
Page 79 and 80: Logical Device Fault Status M1 (Sta
Page 83 and 84: Primary Logical Device Address, Wor
Page 85 and 86: SLC/Scanner Configuration Scanner C
Page 87 and 88: Chapter 6 Module Control and Status
Page 89 and 90: Module Control and Status Word 6-91
Page 91 and 92: Transferring Data over the High-Spe
Page 93 and 94: Data Transfer Status Word Module Co
Page 95 and 96: Program File 2 0000 0001 0002 Modul
Page 97 and 98: Program File 4 0000 0001 0002 0003
Page 99 and 100: Module Status Counters Module Contr
Page 101 and 102: RIO Block Transfer Theory of Operat
Page 103 and 104: SLC Processor ➀ RIO Block Transfe
Page 105 and 106: RIO Block Transfer General Function
Page 107 and 108: Example 2 # 2 # 4 # 1 # 2 # 3 # 4 #
Page 109 and 110: M0 File BT Control Buffer Layout BT
Page 111 and 112: Error Code Description RIO Block Tr
Page 113 and 114: RIO Block Transfer 7-115 Your SLC c
Page 115 and 116: Control EN TO Status Flag EW ST ER
Page 117: Control Flag EN TO Status Flag EW S
Page 121 and 122: Block Transfer Read Control Logic E
Page 123 and 124: RIO Block Transfer 7-125 Rung 2:3 W
Page 125 and 126: RIO Block Transfer 7-127 Rung 2:1 C
Page 127 and 128: Directional Continuous Block Transf
Page 131 and 132: Directional Repeating Block Transfe
Page 133 and 134: Rung 2:5 Block transfer reads will
Page 137 and 138: Bidirectional Continuous Block Tran
Page 139 and 140: RIO Block Transfer 7-141 When a BTR
Page 141 and 142: RIO Block Transfer 7-143 Rung 2:9 T
Page 143 and 144: RIO Block Transfer 7-145 Rung 2:1 C
Page 147 and 148: RIO Block Transfer 7-149 Rung 2:10
Page 149 and 150: RIO Block Transfer 7-151 Rung 2:2 U
Page 153 and 154: RIO Block Transfer 7-155 Rung 2:11
Page 155 and 156: Switchover Considerations Chapter 8
Page 157 and 158: Switchover Considerations 8-159 Div
Page 159 and 160: Switchover Considerations 8-161 Dur
Page 161 and 162: Switchover Considerations 8-163 The
Page 163 and 164: Programming Techniques Chapter 9 Ch
Page 165 and 166: Program File 3 0000 0001 0002 0003
Page 167 and 168: 0009 0010 0011 0012 Programming Tec
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0017 Programming Techniques 9-171 T
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0005 0006 0007 0008 0009 0010 0011
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0021 0022 0023 0024 0025 0026 0027
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Programming Techniques 9-177 Data T
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Programming Techniques 9-179 3. For
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Programming Techniques 9-181 The ha
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Programming Techniques 9-183 Howeve
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Backup Scanner Operating Specificat
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Calculating Throughput Specificatio
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Specifications A-189 You need to ca
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Determining T btx All Baud Rates 57
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Specifications A-193 3. Calculate t
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Backup Scanner Output Delay Time (T
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M0-M1 Files and G Files Appendix B
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Monitoring Bit Addresses M0-M1 File
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Access Time M0-M1 Files and G Files
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S:4/8 causes the #M1:4.3 file to up
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M0-M1 Files and G Files B-205 G Fil
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M0-M1 Files and G Files B-207 With
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RIO Configuration Worksheet Appendi
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Glossary The following terms are us
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Glossary 213 Module Status Word (MS
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Numerics 1/2-slot addressing, 1-13,
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minimizing the scan time, B-6 speci
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Index I-ccxix Publication 1747-6.22
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Publication 1747-6.22 — October 1
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1747-6.22, Backup Scanner User Manual

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