Name: Allen-Bradley PLC-2/30
Brand: Allen-Bradley
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Output Override and I/O Update Instructions

Chapter 7

710

Figure 7.5

Remote

I/O Configuration Example

0123

Module Groups

4567

Module Groups

Remote I/O

Scanner/

Distribution Panel

Rack 4

(Remote)

Rack 3

(Remote)

Rack 2

(Remote)

Rack 1

(Local)

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Important User Information3
Table of Contents4
Introduction 15
Table of Contents10
Introduction12
General12
Capabilities14
Complementary I/O15
Data Highway Compatibility15
Interface Modules15
Additional Publications16
ERR Message for Invalid Display of Processor Memory16
Hardware Considerations 218
Mode Select Switch18
PLC 2/30 Processor19
Memory Write Protect19
Memory Write Protect Jumper20
Run Time Errors20
Processor Diagnostic Indicators21
Memory Fault21
Battery Low21
Power up Recovery22
Switch Group Assembly22
Last State Switch23
I/O Rack Number23
Local System Structure24
Industrial Terminal24
1771 I/O Chassis Backplane Switch Settings for Local I/O Systems24
Remote System Structure25
Local/Remote System Structure26
Hardware Addressing Modes27
Auxiliary Power Supplies27
1777 P2 Auxiliary Power Supply28
1771 P7 Power Supply28
Data Table29
Memory Structure29
Memory Word Structure29
Memory Organization30
Data Table Areas32
Processor Work Areas 1 and 232
Output Image Table33
Timer/Counter Accumulated Values, Bit/Word Storage34
Input Image Table34
PLC 2/30 Memory Organization (Default Configuration)36
Relation of Word Address to Hardware38
Timer/Counter Preset Values, Bit/Word Storage39
Developing the Data Table39
Displaying the Data Table39
Data Table Configuration40
Data Table Area Configuration40
Configuring the Data Table40
Changing Data Table Areas42
Input/Output Image Table Sizes42
Subroutine Area44
Main Program44
User Program44
Message Storage Area45
Hardware/Program Interface45
Image Tables45
Report Generation 945
Instruction Address46
Instruction Address Terminology47
Bit Address to Hardware Relationship (2 Slot Addressing)48
Fundamental Operation49
Relationship of Word Address to Hardware50
Data Table Documentation Forms51
Data Table Word Map51
Example of Data Table Word Map52
Data Table Map (128 Word)52
Example of Data Table Map53
Data Table Word Assignments (64 Word)53
Data Table Bit Assignments54
Example of Data Table Word Assignments54
Example of Data Table Bit Assignments54
Sequencer Table Bit Assignments55
Example of Sequencer Table Bit Assignments56
I/O Assignments56
Timer/Counter Assignments57
Data Storage Assignments57
Bit/Word Storage57
File Storage58
Connection Diagram Addressing Worksheet60
Introduction to Programming66
Ladder Diagram Logic67
Ladder Diagram Rung67
Relay Diagram67
Relay Type Instructions68
Examine Instructions68
Areas of the Ladder Diagram Rung68
Examine on Instruction68
Examine off Instruction69
Output Instructions70
Output Energize Instruction70
Output Latch and Unlatch Instructions71
Unconditional Output Energize Instruction71
Latch/Unlatch Instructions72
Latch/Unlatch Timing Diagram72
Latch and Unlatch Indication73
Branch Instructions74
Branch Start74
Branch End74
Nested Branching Vs. Equivalent Logic75
Example Original Rung with First Part of Duplicate Rung76
Example New Rung with Branch Instruction76
Example New Rung, Completed76
Ending a Program77
Programming Relay Type78
Addressing80
Help Directories80
Searching81
First and Last Rung and User Program Boundaries83
Incomplete Rung83
Single Rung Display83
First or Last Instruction in a Rung83
Remote Mode Select84
Inserting an Instruction85
Removing an Instruction86
Inserting a Rung86
Removing a Rung86
Changing Data of a Word or Block Instruction87
Changing the Address of a Word or Block Instruction87
On Line Data Change87
On Line Programming88
General Rules88
Data Initialization Key89
On Line Programming Procedures90
Insert an Instruction91
Remove an Instruction92
Insert a Rung92
Remove a Rung93
Change an Instruction or Instruction Address93
Correct an Error94
Programming Interruptions95
Clearing Memory95
Clear Memory Functions96
Data Table Clear96
User Program Clear96
Partial Memory Clear96
Program Recommendations97
Total Memory Clear97
Storage Bit Example98
Recommendations for Block Instructions98
Timer and Counter Instructions100
BCD Format100
Timer Instructions101
Timer Accumulated Value Word101
Timer on Delay Instruction102
Timer off Delay Instruction104
Retentive Timer Instruction105
Retentive Timer Reset107
Timer Accuracy for 10Ms Timers107
Counter Instructions107
Up Counter Instruction108
Counter Accumulated Value Word108
Counter Reset Instruction110
Down Counter Instruction111
Up down Counter Example112
Scan Counter Instruction112
Cascading Timers or Counters113
Cascading Counters Example113
Programming Timer and Counter Instructions113
Scan Time and Instruction Execution Times116
Scan Time116
Program for Determining Scan Time117
Program for Determining Average Scan Time118
Instruction Execution Time118
File to File Move and File Complement121
Logic Instructions122
Data Manipulation Instructions124
BCD Word Format124
Data Transfer Instructions125
Get Instruction125
Octal Format125
Get and Put Instructions126
Changing a Counter Preset127
Les and Equ Instructions127
Less than Comparison128
Greater than Comparison129
Equal to Comparison129
Less than or Equal to Comparison130
Greater than or Equal to Comparison130
Get Byte-Put Instruction131
Get Byte/Limit Test Comparison131
Programming Data Manipulation Instructions132
Arithmetic Instructions134
Arithmetic Instruction Word135
Subtract Instruction136
Add Instruction136
Multiply Instruction137
Divide Instruction137
Programming Arithmetic138
Binary to BCD Conversion141
BCD to Binary Conversion Example Rung141
Binary to BCD Conversion Format142
Binary to BCD Conversion Example Rung143
Output Override and I/O Update144
MCR and ZCL Zone Programming145
I/O Updates146
Scan Sequence146
Immediate Input Instruction148
Immediate Output149
Immediate Output Instruction150
Programming Immediate I/O151
Remote Fault Zone Programming152
Remote I/O Configuration Example153
Fault Status Bits154
Dependent Fault Zone Programming155
Dependent Programming155
Independent Programming156
Watchdog Timer159
Switch Group Settings161
Communication Rate Setting161
Peripheral Functions161
Contact Histogram162
Key Sequence for Setting Baud Rate162
Contact Histogram Functions163
Contact Histogram Display163
Digital Cassette Recorder164
Dumping Memory Content to Cassette Tape164
Loading Memory from Cassette Tape164
Program Verification165
Displaying and Locating Errors166
Data Cartridge Recorder166
Dumping Memory Content Onto Data Cartridge Tape166
Loading Memory from a Data Cartridge Tape167
Total Memory Dump168
Ladder Diagram Dump168
Data Cartridge Verification168
Data Table Printout in Hexadecimal169
Report Generation170
Alphanumeric Keytop Overlays172
Report Generation Commands173
Message Store - MS174
Address Delimiters175
Message Print - MP175
Message Report - MR176
Message Delete - MD176
Message Index - MI176
Control Codes and Special Commands176
Example Graphic/Alphanumeric Message177
Alphanumeric/Graphic Keytop Definitions178
Industrial Terminal Control Codes179
ASCII Control Codes180
Automatic Report Generation181
Parity Switch Location181
Additional Messages182
Bit Address Message Number Relationship182
Message Request Bit Done Bit Relationship183
Example Programming183
Example Program to Request a Message184
Block Transfer185
Module Position Image Table Byte Relationship186
Block Transfer Diagram187
Timer/Counter Block Transfer Analogy187
Data Address and Module Address188
Block Transfer Instructions188
Block Transfer Format188
Block Length189
File Address189
Enable Bit and Done Bit190
Causes of Run Time Errors190
Data Table Locations for a Block Transfer Read Instruction191
Programming Multiple Reads from One Module194
Defining the Block Transfer Data Address Area195
Defining the Data Address Area195
Buffering Data196
Bidirectional Block Transfer198
Data Table Locations for Bidirectional Block Transfer200
Unequal Block Lengths202
Equal Block Lengths202
Jump Instructions and Subroutine Programming203
JUMP Format204
JUMP to LABEL Operation204
Programming Jump/Subroutine Instructions205
Multiple Jumps to the same Label205
Jump/Subroutine Programming206
Multiple JUMPS to LABEL in User Program206
Multiple JUMPS to LABEL in Subroutine Area207
Label Instruction208
LABEL Format208
Jump to Subroutine209
JUMP to SUBROUTINE Format210
JUMP to SUBROUTINE LABEL Operation211
Representative Subroutine Area213
Nested Subroutines213
Recursive Subroutine214
Subroutine Programming Considerations214
Return Instruction216
RETURN Format216
Data Transfer File Instructions217
File Concepts217
File Definition217
File Structure218
File Planning218
File Instructions218
File Instruction Format219
Internally Indexed Counter220
Example of an Externally Indexed File Instruction220
Externally Indexed Counter220
Example of an Internally Indexed File Instruction221
Modes of Instruction Operation221
Complete Mode221
Complete Mode Operation222
Status Bits for Complete Mode223
Distributed Complete Mode223
Distributed Complete Mode Operation224
Status Bits for Distributed Complete Mode225
Incremental Mode226
Incremental Mode Operation226
Status Bits for Incremental Mode227
File Instruction Run Time Error228
FILE to FILE MOVE Operation229
Programming File to File Move Instructions230
FILE to FILE MOVE Format230
File to Word Move231
FILE to FILE MOVE Example Rung231
FILE to WORD MOVE Operation232
Word to File Move234
FILE to WORD MOVE Example Rung234
WORD to FILE MOVE Operation235
Programming Word to File Move Instructions235
WORD to FILE MOVE Format236
Data Monitor Mode237
Accessing the Data Monitor Mode237
Accessing the Display238
Example Hexadecimal Data Monitor Display of File Instruction239
Command Buffer240
Data Monitor Display240
File Section240
Header240
Cursor Controls241
Field Cursor241
Field Cursor Commands and Scrolling241
Digit Cursor242
Digit Cursor Commands242
Paging242
Specified Paging242
Scrolling243
Entering and Changing Data243
Paging and Specified Paging243
Data Entry Commands244
Shift Register Instructions245
Shift File up246
Programming Shift File up247
SHIFT FILE up Format248
Shift File down249
Programming Shift File down Instruction249
SHIFT FILE up Example Rung249
FIFO Load and FIFO Unload250
Format for FIFO LOAD and FIFO UNLOAD Instructions251
Programming FIFO Load and FIFO Unload Instruction252
FIFO LOAD and FIFO UNLOAD Example Rung253
Bit Shifts254
Bit Shift Left254
BIT SHIFT LEFT/RIGHT Operation255
Programming Bit Shift Left256
BIT SHIFT LEFT Format257
Bit Shift Right258
BIT SHIFT LEFT Example Rung258
Programming Bit Shift Right259
Examine off Shift Bit259
Programming Examine off Shift Bit Instruction259
EXAMINE off SHIFT BIT Format260
EXAMINE off SHIFT BIT Example Rung260
Examine on Shift Bit261
Programming Examine on Shift Bit Instruction261
Set Shift Bit262
Programming Set Shift Bit Instruction262
SET SHIFT BIT Format263
SET SHIFT BIT Example Rung263
Programming Reset Shift Bit Instruction264
RESET SHIFT BIT Format264
RESET SHIFT BIT Example Rung264
Sequencer Instructions265
Comparison with File Instructions265
Sequencer Table266
Sequencer Table Format in the Data Table266
Sequencer Output267
Sequencer Output Analogy267
Operation of the Sequencer Output Instruction268
Masking Output Data269
Masking Transferred Data270
Programming the Sequencer Output Instruction270
SEQUENCER OUTPUT Format271
SEQUENCER OUTPUT Example Rung272
Control of Sequencer Outputs272
Sequencer Input Instruction274
Operation of the Sequencer Input Instruction274
Masking Input Data274
Programming the Sequencer Input Instruction275
SEQUENCER INPUT Format275
Sequencer Load Instruction277
SEQUENCER LOAD Format279
SEQUENCER LOAD Example Rung280
File Logic Instructions281
- File to File and282
- File to File XOR285
- Programming of File to File or Instruction285
- Programming File to File XOR Instruction286
- Programming File Complement Instruction287
- FILE COMPLEMENT Format287
- Word to File Logic288
- WORD to FILE LOGIC Operations289
- Programming Word to File and Instruction290
- Programming Word to File or Instruction292
- Programming Word to File XOR Instruction293
- FILE SEARCH Operation294
File Search and File Diagnostic Instructions294
- Programming File Search Instruction295
- FILE SEARCH Format296
- FILE SEARCH Example Rung297
- File Diagnostics297
- Programming File Diagnostic Instruction299
Troubleshooting Aids301
- Bit Manipulation and Monitor302
- Bit Monitor303
- Force on and Force off Functions303
- Forced Address Display304
- Temporary End Instruction305
- ERR Message for an Illegal OP Code305
Special Programming Techniques307
- Trailing Edge One Shot308
- Addressing Your Hardware309
- Hardware/Data Table Addressing Relationships310
- Addressing Modes310
- 2 Slot Addressing311
- Using 8 Point I/O Modules311
- Using 16 Point I/O Modules314
- Assigning I/O Rack Numbers315
- 1 Slot Addressing316
- Assigning I/O Rack Numbers with 1 Slot Addressing318
- System Configurations324
- Number Systems326
- Decimal Numbering System326
- Octal Numbering System327
- Binary Numbering System328
- Binary Coded Decimal329
- Binary Coded Octal330
- BCD Representation330
- Numbering System Conversion Chart331
- Octal Representation331
- Hexadecimal Numbering331
- Hexadecimal to Decimal Conversion332
- Hexadecimal to Binary Conversion332
- Programming .01 Second Timers333
- Time Base Selection333
- Timer Accuracy334
- Timing Diagram335
- 10 Msec Timers - Typical Applications336
- Hardware/Processor Considerations337
- Program Execution338
- Programming Compensation339
- Program Scan Time Computation341
- Index343

Brand	Allen-Bradley
Model	PLC-2/30
Category	Controller
Language	English

Allen-Bradley PLC-2/30 User Manual

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