Toshiba T2N User Manual Page 122
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2.INTERNAL OPERATIONS
User’s manual 109
If we consider the T2N operation simply from the viewpoint of external signal
exchange, batch I/O processing and user program execution can be considered
to be repeated continuously, as shown in the following diagram.
latest input data incorporated in XW
YW data output externally
batch I/O processing
running user program
scan
YW data fixed with reference to XW data
So basically, this has the advantage that high speed scans can take place so
that I/O module data is not exchanged during user program execution and also
it is easy to create program logic which prevents XW data changing during user
program execution. This method is called the batch I/O processing method
(refresh method).
There is also another method of the T2N operation whereby I/O module data
exchange takes place during user program execution, using IW/I instead of
XW/X and OW/O instead of YW/Y. This method is called the direct I/O processing
method. It is recommended that the I/O modules used in direct I/O are inhibited
the batch I/O (they have i specification on I/O allocation) so shorten the time for
batch I/O processing.
1. Use the following criteria for batch I/O processing time.
2. input (XW)
3. output (YW)
4. link(W) ... 8 µs/register
5. (LW) ... 22µs/register
6. I/O modules with i specification on I/O allocation (iX, iY, iX + Y) are not
part of batch I/O processing. Refer to Part 3 for I/O allocation.
7. Forced input device (X), link register relay (Z), and link relay (L) are not part
of batch I/O processing. The force function is explained in section 5.
8. Refer to the data transmission module manual for the allocation of the link
register/relay (W/Z and L/LW) to the data transmission module.
9. With the direct I/O processing method, output is in register units even
when the bit (O) is specified. Refer to Part 3 for direct I/O registers.
... approximately 45µs/register
NOTE
- USER’S MANUAL 1
- Important Information 2
- CE Marking 3
- Safety Precautions 4
- Introduction 8
- About This Manual 10
- Contents 11
- Features 15
- HARDWARE 17
- User’s manual 3 18
- 1.System Configuration 19
- 4 PROSEC T2N 19
- User’s manual 5 20
- 6 PROSEC T2N 21
- User’s manual 7 22
- 8 PROSEC T2N 23
- User’s Manual 9 24
- 10 PROSEC T2N 25
- User’s Manual 11 26
- 12 PROSEC T2N 27
- User’s Manual 13 28
- 14 PROSEC T2N 29
- User’s Manual 15 30
- 16 PROSEC T2N 31
- User’s Manual 17 32
- 18 PROSEC T2N 33
- User’s Manual 19 34
- 20 PROSEC T2N 35
- User’s manual 21 36
- General Specification 36
- 2.Specification 37
- User’s manual 23 38
- 24 PROSEC T2N 39
- User’s manual 25 40
- 26 PROSEC T2N 41
- User’s manual 27 42
- User’s manual 29 44
- User’s manual 31 46
- User’s manual 33 48
- User’s manual 35 50
- User’s manual 37 52
- User’s manual 39 54
- User’s manual 41 56
- User’s manual 43 58
- User’s manual 45 60
- User’s manual 47 62
- User’s manual 49 64
- User’s manual 51 66
- 52 PROSEC T2N 67
- User’s manual 53 68
- 54 PROSEC T2N 69
- User’s manual 55 70
- 56 PROSEC T2N 71
- Relay Output Module 71
- Application Precautions 71
- User’s manual 57 72
- 58 PROSEC T2N 73
- User’s manual 59 74
- 4.Installation and Wiring 75
- 60 PROSEC T2N 75
- User’s manual 61 76
- 62 PROSEC T2N 77
- User’s manual 63 78
- Grounding Methods 78
- 64 PROSEC T2N 79
- User’s manual 65 80
- 66 PROSEC T2N 81
- User’s manual 67 82
- 68 PROSEC T2N 83
- User’s manual 69 84
- Safty circuit 84
- 5.Maintenance and Checks 85
- 70 PROSEC T2N 85
- User’s manual 71 86
- 72 PROSEC T2N 87
- User’s manual 73 88
- Spare Parts to Keep in 88
- 74 PROSEC T2N 89
- User’s manual 75 90
- 76 PROSEC T2N 91
- User’s manual 77 92
- 78 PROSEC T2N 93
- User’s manual 79 94
- Program Check 94
- 80 PROSEC T2N 95
- User’s manual 81 96
- 82 PROSEC T2N 97
- User’s manual 83 98
- List of Items for Self 98
- Diagnostic Check 98
- 84 PROSEC T2N 99
- User’s manual 85 100
- 86 PROSEC T2N 101
- 6.Troubleshooting 101
- User’s manual 87 102
- 88 PROSEC T2N 103
- User’s manual 89 104
- 90 PROSEC T2N 105
- User’s manual 91 106
- FUNCTIONS 107
- 1.Overview 108
- 1.Overview 109
- 96 PROSEC T2N 109
- 2.INTERNAL OPERATIONS 111
- 98 PROSEC T2N 111
- User’s manual 99 112
- 100 PROSEC T2N 113
- User’s manual 101 114
- 102 PROSEC T2N 115
- User’s manual 103 116
- 104 PROSEC T2N 117
- User’s manual 105 118
- 106 PROSEC T2N 119
- User’s manual 107 120
- 108 PROSEC T2N 121
- User’s manual 109 122
- 110 PROSEC T2N 123
- User’s manual 111 124
- 112 PROSEC T2N 125
- User’s manual 113 126
- 114 PROSEC T2N 127
- User’s manual 115 128
- Program classification 128
- 116 PROSEC T2N 129
- User’s manual 117 130
- 4.Peripheral Memory Support 131
- User’s manual 119 132
- 5.RAS Functions 133
- 120 PROSEC T2N 133
- User’s manual 121 134
- 122 PROSEC T2N 135
- User’s manual 123 136
- 124 PROSEC T2N 137
- User’s manual 125 138
- 126 PROSEC T2N 139
- User’s manual 127 140
- 128 PROSEC T2N 141
- User’s manual 129 142
- System diagnostics 142
- 130 PROSEC T2N 143
- User’s manual 131 144
- 132 PROSEC T2N 145
- 1. Overview 146
- USER PROGRAMS 146
- 2. User Program Configuration 150
- 3.User Data 162
- 3. User Data 163
- (MSB) (LSB) 192
- F––––––0 F––––– 192
- (Exponent-127) 195
- 4. I/O Allocation 202
- 5. Programming Language 212
- 237+18.4n 256
- 160+75.5n 258
- 143+39.4n 258
- 427+10.6n 260
- APPENDICES 265
- Ordering Information 266
- 256 PROSEC T2N 267
- User’s manual 257 268
- 258 PROSEC T2N 269
- User’s manual 259 270
- 260 PROSEC T2N 271
- TOSHIBA INTERNATIONAL 272
- CORPORATION PTY. LTD 272
- TOSHIBA CORPORATION 272
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