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Oceniono. / 5. Na podstawie oceny klientów
Chapter 7
7-17
Although the control coprocessor and expander are able to communicate
successfully with RS-422 devices, the RS-422 that the control coprocessor
and the expander support is not true RS-422 communication. True RS-422
communication can go to 1,200 meters (3,937 ft) at the coprocessor’s
maximum baud rate of 19.2 kbps; the coprocessor can only go a distance
of 200 ft at that rate.
True RS-422 can go long distances because it uses a balanced (differential)
driver and receiver with a balanced wiring pair—i.e., a pair of wires in
which neither the signal nor the signal-return line is connected to the
ground—which makes it highly immune to common-mode noise, as well
as because it uses a fast rise time. The coprocessor and expander use an
unbalanced—single-ended—configuration where the signal-return line is
connected to the ground, and the rise time is slower. A balanced
transmitter/receiver can be connected to and communicate with an
unbalanced transmitter/receiver as long as the maximum cable length is
reduced to that of the unbalanced specification—in this case, 200 ft.
Using a Serial Port for
RSĆ422 Communication
- 1
- Important User Information 2
- Summary of Changes 3
- Using This Manual 4
- Going Through This Manual 5
- Finding More Information 5
- Reporting Corrections 5
- Table of Contents 6
- Chapter 1 6
- Chapter 2 6
- Chapter 3 6
- Using the Programming 7
- Environment 7
- Using the Ethernet Interface 7
- Chapter 8 8
- Appendix A 8
- Using the PCBridge 10
- Software 10
- Chapter Objectives 11
- Product Overview 11
- ControlĆCoprocessor Modules 12
- Hardware Overview 13
- Modes of Communication 14
- Controller 14
- Standalone Mode 15
- Programming Overview 16
- ProgramĆDevelopment Software 17
- Programming Languages 18
- What You Need to Install 19
- Your Control Coprocessor 19
- Select a Power Supply 20
- Prevent Electrostatic 20
- Discharge Damage 20
- Coprocessor Battery 21
- Install the ControlĆ 21
- Disposing of the Battery 22
- Install the Keying Bands 23
- Set Switch Configurations 24
- Install the Control 25
- Coprocessor 25
- Chapter 2 26
- Wire the Fault Relay 28
- Apply Power to the 29
- Control Coprocessor 29
- Remove the Control 29
- What to Do Next 29
- Getting Started with the 30
- Select the 31
- Programming Interface 31
- Install the Software on Your 31
- Personal Computer 31
- Access the PCBridge 34
- Configure Communication 35
- Access and Use the OSĆ9 36
- CommandĆLine Interface 36
- Set Time for OSĆ9 37
- Configure the 38
- Configure System Memory 40
- Chapter 3 41
- Figure 3.13 41
- Configure the RAM Disk 41
- Figure 3.14 42
- View ControlĆCoprocessor 48
- Current Status 48
- Create a User Startup File 48
- Send a Text File to the 49
- Send the Text File to OSĆ9 50
- Find Other OSĆ9 Commands 52
- CreateaCTestProgram 53
- Compile a C Test Program 54
- Send a Binary File to the 55
- Confirm File Passage to the 57
- Create a BASIC 57
- Test Program 57
- Use an Example Application 58
- Program to Access the 58
- RAM Disk 58
- Chapter 4 59
- Developing Programs 61
- What Is the Application 62
- Program Interface? 62
- When to Use API Functions 62
- How to Use DTL Functions 63
- Conversion Functions 64
- Utility Function 65
- How to Use BPI Functions 66
- How to Use Message 67
- Instructions 67
- Chapter 5 69
- Table 5.G 69
- How to Use TAG Functions 70
- Read and Write Functions 71
- Lock/Unlock Functions 71
- How to Use CC Utility 72
- Synchronization Function 73
- Status Function 73
- Prepare Programs for 74
- DirectĆConnect Mode 74
- Sample C Program 75
- 76
- Sample BASIC Program 77
- Sample ControlĆLogic Program 81
- Connecting Ethernet to 83
- Addresses for the 84
- Modifying the Ethernet 85
- Configuration Files 85
- HOSTS.EQUIV File 86
- NETWORKS File 87
- PROTOCOLS File 87
- SERVICES File 88
- STARTINET File 91
- Password File 92
- Ethernet Hardware Address 92
- Configuring the 93
- Using the OSĆ9/Internet 93
- FTP Utility 93
- FTP Send Session 94
- FTP Get Session 97
- TELNET Utility 98
- Using the Internet Socket 100
- Library in C Programs 100
- Chapter 6 101
- !!!! 101
- !!!! 102
- INTERCHANGE Daemon 103
- Using the INTERD 103
- Allocation 104
- 105
- 105
- Using the SNMPD Daemon 108
- Using the Serial Ports 109
- Setting Up Communication 110
- Parameters 110
- Referencing OSĆ9 Serial 112
- Port Device Names 112
- Connecting to the 112
- Serial Port 112
- Using a Serial Port for ASCII 113
- Communication 113
- 114
- Using a Serial Port for 118
- RSĆ485 Communication 118
- Chapter 7 120
- RSĆ422 Communication 125
- Serial Expander Module 126
- ASCII Display 126
- Status for LEDs 127
- Product Specifications 128
- Product Compatibility 129
- ControlĆCoprocessor 129
- CSA Certification 130
- UL Certification 130
- 131
- Application Program Interface 132
- Library of Functions 132
- Using Pointers 133
- BPI_DISCRETE 134
- C Example 135
- BASIC Example 135
- References 135
- BPI_READ 136
- Description 137
- BPI_WRITE 139
- CC_DISPLAY_DEC 142
- CC_DISPLAY_EHEX 144
- CC_DISPLAY_HEX 146
- CC_DISPLAY_STR 148
- CC_ERROR 150
- CC_ERRSTR 152
- CC_EXPANDED_STATUS 154
- CC_GET_DISPLAY_STR 156
- 158
- Appendix B 158
- CC_PLC_BTR 159
- CC_PLC_BTW 162
- CC_PLC_STATUS 165
- CC_PLC_SYNC 167
- CC_STATUS 169
- DTL_C_DEFINE 171
- DTL_CLOCK 174
- DTL_DEF_AVAIL 176
- DTL_GET_FLT 178
- DTL_GET_WORD 180
- DTL_GET_3BCD 182
- DTL_GET_4BCD 184
- DTL_INIT 186
- DTL_PUT_FLT 188
- DTL_PUT_WORD 190
- DTL_PUT_3BCD 192
- DTL_PUT_4BCD 194
- DTL_READ_W 196
- DTL_READ_W_IDX 198
- Valid Definition Examples 199
- Invalid Definition Example 199
- DTL_RMW_W 201
- DTL_RMW_W_IDX 204
- DTL_SIZE 207
- DTL_TYPE 209
- DTL_UNDEF 211
- DTL_WRITE_W 213
- DTL_WRITE_W_IDX 216
- MSG_CLR_MASK 219
- MSG_READ_HANDLER 221
- Possible values are: 222
- MSG_READ_W_HANDLER 225
- MSG_SET_MASK 229
- BASIC Examples 230
- MSG_TST_MASK 231
- MSG_WAIT 233
- MSG_WRITE_HANDLER 236
- 0)6(6;4- 49803,7 237
- MSG_WRITE_W_HANDLER 240
- /(5'5:3,387/2+6 241
- MSG_ZERO_MASK 244
- TAG_DEF_AVAIL 246
- TAG_DEFINE 247
- TAG_GLOBAL_UNDEF 250
- TAG_LINK 252
- TAG_LOCK 254
- TAG_READ 256
- TAG_READ_W 258
- TAG_UNDEF 260
- TAG_UNLOCK 262
- TAG_WRITE 264
- TAG_WRITE_W 266
- Error Values 268
- 0)7(7>5-5:904,8 269
- #**1( (-,#'+ 271
- BASIC Function Codes 272
- Cable Connections 274
- Connecting to the 25ĆPin 276
- COMM1, 2, and 3 Ports 276
- Cable Length Requirements 277
- Cable Configurations 277
- Ethernet Port 278
- Using the PCBridge Software 279
- Edit Key Definitions 280
- Log Session to the Printer 281
- Toggle the Status Line 281
- Loading Memory Module 282
- Log On Remotely to 282
- OSĆ9 Terminal 282
- 283
- Appendix D 283
- Figure D.3 283
- Transfer List 283
- T) Modify Transfer List 283
- Modify Transfer List 284
- Modify Build List 284
- Using the Debugger 285
- Compiler Options 287
- Troubleshooting PCBridge 289
- Problems 289
- PCBridge Utilities 289
- Function 290
- Examples 291
- Functions 292
- See Also 294
- ASCII Character Codes 311
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