Yokogawa Touch Screen GP20 User Manual Page 329
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IM 04L51B01-01EN
Using Modbus Functions (Communicating with Modbus devices)
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App
4.4 Using Modbus to Enable the GX/GP to Read
Data from and Write Data to Other Devices
(Modbus master function)
The GX/GP can operate as a Modbus master device.
The GX/GP can connect to another device (Modbus slave device) via Modbus and
read from and write to the device’s internal registers. Read data can be handled using
communication channels. Data that can be written are I/O channel data, math channel data,
and communication channel data.
Modbus slave device
Modbus master
Serial communication
GX/GP
Command
Input register
Hold register
Read
Write
Read
3XXXXX
4XXXXX
Write
Read
Read
Slave device internal register
GX/GP
4.4.1 Setting Serial Communication Conditions
Description
• Configure the receiver function
• Set data transfer conditions
For details on the settings, see page 1-138 in section 1.17.1, “Setting Basic Communication
Conditions”.
4.4.2 Configuring the Modbus Master Function
Description
• Enable the master function
• Set communication conditions
• Set the recovery action
For details on the settings, see page 1-139 in section 1.17.2, “Enabling or Disabling the Modbus
Master Function (/MC option) and Setting Communication Conditions”.
For details on the Modbus functions and registers that the GX/GP supports, see page 4-11 in
section 4.5, “Modbus Function and Register Assignments”.
4.4.3 Setting Commands
Description
• Set the master command number
• Set the command
For details on the settings, see page 1-140 in section 1.17.3, “Setting Modbus Master
Transmission Commands”.
For command setting examples, see page 4-4 in section 4.2.4, “Setting Commands”.
- Paperless Recorder 1
- User’s Manual 1
- Introduction 3
- Trademarks 4
- Using Open Source Software 4
- Revisions 4
- GX/GP Versions and Functions 5
- How to Use This Manual 6
- Contents 9
- IM 04L51B01-01EN 10
- Appendix 13
- 1. Measurement Source 15
- 3. Displaying Measured Data 17
- 4. Saving Data 18
- 5. Event Action Function 18
- Time (time zone) 20
- 8. Security Function 21
- 9. Communication Function 21
- 10. Miscellaneous 23
- Date/time Settings 24
- (including DI) channels) 25
- Set the input type range 26
- Range Details 26
- Span Lower, Span Upper 27
- Calculation 27
- Reference channel 27
- Low-cut value 28
- Moving average 29
- Burnout set 30
- 1.2.2 Setting Alarms 31
- 1.2.3 Setting the Display 35
- When zone display is not used 36
- When zone display is used 36
- Scale position 37
- Division 40
- Status Display Section 45
- Trend Display (T-Y) 46
- • Alarm Indication 46
- Digital Display 46
- Bar Graph Display 47
- • Bar Graph Updating 47
- Linearizer Approximation 49
- Linearizer Bias 49
- 1.3.1 Setting the Range 50
- 1.3.2 Setting Alarms 51
- 1.3.3 Setting the Display 53
- Position 54
- 1.4.1 Setting the Range 56
- Energize/De-energize 57
- Relay action on ACK 57
- Example: 57
- Alarm output relay 58
- DO Output Relay Operation 59
- 1.4.2 Setting the Display 60
- Value on Overflow 62
- 1.5.2 Setting Expressions 63
- Math range 63
- Rolling average 65
- Handling of Overflow Data 67
- 1.5.3 Writing Expressions 68
- Basic Arithmetic 69
- Power and Other Computations 69
- Relational Computation 69
- Logical Computation 70
- TLOG Computation 71
- CLOG Computation 72
- Special Computations 73
- Conditional Expression 74
- 1.5.4 Setting Alarms 75
- 1.5.5 Setting the Display 76
- Constant 79
- Trend interval [/div] 80
- Trend rate switching 80
- Second interval [/div] 80
- 1.6.2 Setting Display Groups 81
- Group settings 81
- Scale image 82
- Trip line 1 to 4 82
- Message number 83
- Message 1 to 100 83
- Writing Messages 83
- Value indicator 85
- Digit of mark 85
- Backlight saver 87
- Calendar display 88
- A/D integrate, etc.) 89
- Conditions 92
- Recording mode 92
- Display Data, Trend Waveform 92
- Data length 94
- Pre-trigger 95
- Trigger source operation 95
- Display Data and Event Data 96
- Data Types 98
- Internal Memory 99
- Description 100
- Display data, Trend waveform 100
- Event data 100
- Manual sample 100
- Procedure 101
- OFF mode 102
- Save directory 103
- File header 103
- Data file name 103
- Explanation 104
- File name 104
- Media save 105
- File 1 File 2 106
- 107
- Saved the previous time 107
- Save operation 107
- Saved this time 107
- Auto Save Timing 108
- File format 109
- Batch function 110
- 1.10.2 Setting Batch Text 110
- Text field 110
- Title of field 111
- Characters 111
- Using the Batch Function 111
- Creation time 112
- Data type 113
- File type 113
- Report template output 113
- Report channel 114
- Unit of Sum Computation 115
- 1.12.1 Excel Report Files 116
- 1.12.2 PDF Report Files 117
- • Auto Save 118
- Printer Output 118
- 1.13 Setting the Timers 119
- Hour, Minute 120
- Timer match condition 121
- Timer action 121
- Event action 122
- Alarm level 123
- Operation mode 123
- 1.14.2 Event Action Examples 128
- Setting Match Time Timer 1 129
- Configuring the Event Action 129
- Other Settings 129
- On/Off, Span 130
- At Power on 130
- Preset value 131
- Watchdog timer 131
- 1.15.2 Setting Alarms 132
- Alarm delay 133
- 1.15.3 Setting the Display 133
- Bar graph 134
- Color scale band 135
- Alarm point mark 136
- Function 137
- DNS settings 138
- Domain suffix 138
- Host settings 138
- Host name registration 138
- FTP client function 139
- Transfer file 139
- Transfer wait time 139
- FTP connection Primary 140
- FTP connection Secondary 140
- SMTP client function 141
- Authentication 141
- SMTP server 141
- POP3 server 142
- Mail header 142
- E-mail contents 143
- Alarm settings 143
- Report settings 143
- Scheduled settings 143
- System settings 144
- SNTP client function 144
- SNTP server 145
- Query action 145
- Modbus client function 146
- Communication 146
- Recovery action 146
- Connection 146
- Modbus server settings 147
- Command setting 148
- (/C2 and /C3 options) 152
- Command settings 154
- Date format 155
- Change Alarms 156
- Rate of change 156
- Daylight Saving Time 158
- Start time 158
- End time 158
- Internal switch 160
- Status Output 162
- Relay Operation 162
- Settings 163
- USB input device 165
- Security function 166
- Authority of user 170
- 1.20 Loading Settings 171
- Deleting 174
- 1.21.2 Saving a Scale Image 177
- Media kind 179
- Folder name 179
- Volume name 181
- Initializing a Specific Item 183
- Computation 185
- Stopping Recording 186
- Starting Recording 188
- Staring Computation 190
- Stopping Computation 191
- Waveform Updating 195
- The menu screen appears 197
- Display) 199
- Overview 200
- Displaying the Multi Panel 201
- Switching the Multi Panel 201
- Writing a Registered Message 202
- Writing a Free Message 203
- Writing an Added Message 204
- • Writing a Free Message 204
- Display Color of Messages 205
- Added Messages 205
- Writing on the Trend Display 206
- Release top channel display 210
- Reading Measured Values 211
- Display Conditions 214
- Searchable Range 214
- Showing the Standard Display 216
- Alarm Summary) 217
- Displaying the Alarm Summary 217
- Scrolling the Alarm Display 217
- Switching the Display Mode 218
- Saving Alarm Summary 218
- Scrolling the Message Display 219
- Saving Data 221
- • Saving a Specific File 221
- 2.3.4 Displaying Reports 223
- Scrolling Report Channels 224
- 2.3.5 Displaying Logs 225
- Operate log 226
- Error Log 226
- General Log 227
- Mail Log 228
- Modbus Log 229
- SNTP Log 230
- DHCP Log 231
- Displaying the Command Status 232
- Communication Condition 233
- Communication Status 233
- Resuming Command Transmission 233
- Data Dropout 233
- Switch the page 234
- Drag or flick 234
- XX-XX-XX-XX-XX-XX 235
- Display Item 235
- Alarm icon 236
- Add a favorite screen 237
- Favorite screen list 237
- Deleting a Favorite Screen 238
- Operation 240
- Eject external 241
- 2.6.2 Using a Mouse 243
- Starting Mail Transmission 244
- Stopping Mail Transmission 244
- Mail Retransmission 244
- Outputting a Snapshot 246
- Outputting Reports 246
- Obtaining Network Information 246
- Releasing Network Information 247
- 2.9.1 Locking the Operation 250
- Logging In 251
- Logging Out 251
- • Using Touch Operation 251
- • Auto Logout 251
- 2.10.2 Changing the Password 252
- (Web server function) 253
- Functional Overview 254
- PC System Requirements 254
- GX/GP Configuration 254
- Starting the Web Application 255
- Information bar 257
- Closing the Web Application 258
- Status Indications 260
- 3.1.3 Controlling the GX/GP 261
- Starting Computing 263
- Stopping Computing 263
- Resetting Computing 263
- Math ACK 263
- Alarm ACK 263
- Resetting a Relative Timer 264
- Resetting a Match Time Timer 265
- Viewing the Batch text 265
- Changing the Time Using SNTP 265
- Writing Messages 265
- Switching the Monitor Display 266
- Favorite Monitors 268
- Digital Monitor 270
- Bar Graph Monitor 270
- What Is the Active Y-axis? 272
- Channel color 274
- Channel name 274
- Measured value 274
- Displaying Trends’ Past Data 275
- Bar Graph 278
- Overview Monitor 279
- Display Group 280
- Switch the display group 281
- Alarm Summary Monitor 282
- Message Summary Monitor 283
- Error Log Monitor 284
- Network Information Monitor 285
- System Information Monitor 286
- Displaying Snapshot Screens 287
- 3.1.5 Changing Settings 288
- Setup Change Procedure 289
- Editing Settings 290
- Click a color to select it 291
- Select the check box 292
- Operation Example 6 294
- Selecting a Range of Settings 294
- Click the line name 294
- Operation Example 8 296
- Operation Example 11 300
- Saving GX/GP Settings 301
- Printing the Settings 303
- Transmitting E-mail Messages 306
- 3.2.5 E-mail Format 307
- • Subject 311
- • Syntax 311
- Test Mail Transmission Format 312
- (FTP client function) 315
- Files to Transfer via FTP 316
- Shifting the Transfer Time 316
- • Set the query operation 318
- (Modbus server function) 321
- Specifying Register Numbers 322
- (Modbus client function) 323
- 4.2.4 Setting Commands 324
- Examples of Setting Commands 325
- Example 1 325
- Example 2 325
- Example 3 326
- Example 4 326
- Writing Data to a Server 326
- (Modbus master function) 329
- Special value output 331
- Writing I/O Channel Data 332
- Writing Math Channel Data 332
- Input Register 333
- Hold Register 334
- Input Relay 334
- Common Items 335
- I/O Channel Data 335
- • 32-bit Signed Integer 335
- Register 300002 336
- Channel 0001 data 336
- Register 300001 336
- • 32-bit floating point 337
- • 16-bit Signed Integer 338
- Continuous Channel Data Area 340
- GX/GP Status 343
- Communication Channel 352
- Internal Switch 352
- GX/GP Operation Setting 352
- 5.1 Maintenance 355
- DC voltage/current standard 356
- Wiring to the first channel 356
- (Channel ��01) 356
- Using a Password 359
- Adjusting and Checking 360
- Checking 360
- 5.2 Troubleshooting 363
- • Execution Errors 364
- • Operation Errors 364
- • Errors Related to E-mail 365
- • SNTP Errors 367
- • DHCP Errors 367
- • Other Communication Errors 368
- Communication Errors 368
- Status Messages 369
- System Errors 370
- Error Messages 371
- Warning Messages 372
- Information Messages 373
- 5.2.2 Troubleshooting 374
- File Size 377
- Display Data 379
- Event Data 379
- File Output Example 383
- • Display Data 383
- • Event Data 384
- Output Example 388
- • Batch Report 389
- Alarm Summary Format 391
- Template Example 392
- Report Output Example 392
- Keyword Definitions 394
- • System Keywords 394
- • Report Data Keywords 394
- • Special Keywords 394
- • Parameters 395
- Report Template Examples 397
- Power Failure Detection 399
- Basic Operation 399
- Communication Operation 400
- DO Operation 400
- Scale Images 401
- Creating a Scale Image 401
- Appendix 7 Terminology 404
- Specications 405
- X X X X 406
- Clock Functions 408
- Batch Function 408
- Printer Output Function 408
- Other Functions 408
- HARDWARE SPECIFICATIONS 409
- (MAIN UNIT) 409
- Normal Operating Conditions 410
- Other Specications 410
- EXTERNAL DIMENSIONS AND 411
- PANEL CUTOUT DIMENSIONS 411
- SPECIFICATIONS OF OPTIONAL 412
- FUNCTIONS 412
- 24 V DC/AC POWER SUPPLY (/P1) 413
- USB INTERFACE (/UH) 413
- Continued 415
- * Rounding up decimal places 415
- Safety and EMC Standards 416
- Construction 417
- Power Supply 417
- Isolation 417
- Terminal arrangements 417
- A/D Calibration Value 417
- External Dimensions 418
- DIGITAL INPUT MODULE (Model 419
- GX90XD or Options /CRx1) 419
- DIGITAL OUTPUT MODULE (Model 421
- APPLICATION SOFTWARE 422
- MODEL AND SUFFIX CODES 423
- Standard Accessories 424
- GS 04L51B01-01EN 425
- May. 7, 2013-00 425
- Data Saving Functions 427
- GS 04L52B01-01EN 446
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