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Vission 20/20 • Operation and Service Manual •Vilter/Emerson • 35391SC 2.0
Appendix B • Vission 20/20 Application Procedures
REMOTE COMPRESSOR CONTROL VIA
COMMUNICATIONS
A compressor control scheme that is accomplished via
communications must follow some general rules. The
Vission 20/20 panel does not have a separate processor
to handle communications from a computer or PLC. All
tasks that the panel needs to accomplish are done by a
single processor. So when a device communicates to the
panel, the polling rate to the 20/20 panel can’t be unlim-
ited, it needs to be governed.
A typical compressor control scheme might look like
this:
(For communication register information, refer Table
B-4)
Figure B-24. Typical Block Diagram of a Multi-Compressor Control Scheme (1 of 4)
- Important Message 5
- Table of Contents 10
- List of Tables and Figures 11
- How to Use This Manual 14
- Proper Wiring Sizing 17
- Voltage Source 17
- Wiring Methods 19
- Best Practices 20
- Digital Input/Output (I/O) 22
- Board I/O # Description Type 23
- Analog Outputs: 26
- Digital Output Boards 28
- Digital Input Boards 29
- Digital In-Out Boards 30
- Analog Input Boards 31
- Analog Input Jumper Tables 32
- Analog Output Boards 34
- Section 4 • Main Screen 35
- Section 5 • Menu Screen 41
- Auto-Cycle 44
- Settings Control 47
- Rapid Cycling VFD Control 49
- Pumpdown Control 50
- Pulldown Control 50
- Control Mode 53
- Stop Load and Force Unload 53
- 6 – 16 / Blank 58
- Section 7 • Alarms and Trips 59
- Section 8 • Timers 65
- 8 – 4 / Blank 68
- Scheduling Setpoint 69
- Capacity Load/Unload Timers 72
- Compressor Sequencing Table 73
- Table 10-1. Status Symbols 74
- Symbol Description 74
- Confi guration Overview 75
- SEQUENCING 77
- 10 – 8 / Blank 78
- Condenser Control Setpoint: 79
- Section 12 • Service Options 83
- 12 – 6 / Blank 88
- Motor Current 90
- Remote Capacity 92
- Slide Valve Operation 96
- Figure 14-4. Photo-chopper 99
- Command Shaft Rotation 100
- *-*-*-*-*-*-*-*-*-*-*-* 103
- *---*---*---*---*---* 103
- *--* 103
- * 103
- *****----* 104
- *--*--* 104
- ********************* 104
- -******************** 104
- Section 15 • Trend Chart 105
- 15 – 4 / Blank 108
- Section 16 • Event List 109
- 16 – 2 / Blank 110
- Section 17 • Input / Output 111
- Overview 115
- Digital Inputs 115
- Digital Outputs 116
- Analog Inputs 116
- Analog Outputs 118
- Section 19 • Configuration 121
- Time & Date 122
- Communications 122
- Touchscreen 122
- Compressor Control 124
- Optional Function Selection 124
- Vilter Only Settings 125
- Condenser Control 125
- Oil Pump 125
- Oil Cooling 125
- Motor Current Device 126
- I/O Confi guration 130
- Section 20 • Data Backup 131
- Save / Load 131
- Factory Reset 133
- Setpoints Report 134
- Section 21 • Maintenance 135
- Checklist 135
- 21 – 4 / Blank 138
- Section 22 • User Access 139
- Manage Accounts 140
- VNC Account 142
- Screen Security Levels 142
- Section 23 • Help Screen 143
- Screen Features 143
- Setup - Confi guration Screen 145
- Operation 146
- Potentiometer 146
- Twin Screw Oil Pressure 148
- COMPRESSOR STARTS 149
- 24 – 6 / Blank 150
- Control Functions 152
- Remote Oil Cooler Setpoint 155
- Step Control 156
- VFD Settings 156
- 26 – 4 / Blank 158
- A - 2 / Blank 160
- Contents 161
- B - 2 / Blank 162
- Pulldown 163
- COMPRESSOR CONTROL MENU 163
- SETPOINT SELECTION EXAMPLE 164
- Pulldown OPERATION EXAMPLE 165
- B - 6 / Blank 166
- Setpoints Setup 167
- CONTROL MODE DROPDOWN BOX 169
- SAFETY SETPOINTS 169
- SETPOINT 2 SELECTION 169
- 1 AND SETPOINT 2 SELECTION 170
- OVERVIEW 171
- CONFIGURATION OVERVIEW 171
- SEQUENCING SLAVE COMPRESSORS 172
- Table B-1. Status Symbols 176
- UNLOADING 177
- SLAVE EXPERIENCING A FAILURE 178
- Database Backup Procedure 179
- CONFIGURATION INFORMATION 181
- REPLACE FLASH CARD 181
- B - 24 / Blank 184
- User Access Menu 185
- Confi guration 186
- Data Backup 186
- 20/20 Panel 187
- (VPN3485C) on USB port P18 189
- NETWORK TOPOLOGY 191
- CONVERTOR 191
- REPEATER 192
- ETHERNET NETWORK TOPOLOGY 194
- ACCESS VIA INTERNET 195
- Example 1 195
- Example 2 196
- Example 3 196
- Example 4 197
- VNC CLIENTS 197
- COMMUNICATIONS 198
- RESTART ON POWER FAILURE 203
- VIA COMMUNICAITONS 203
- Control Selection 204
- CONTROL SCENARIO 206
- REMOTE MONITORING 207
- COMMUNICATION PORT SETUP 207
- B - 48 / Blank 208
- Phoenix Contact PSM-ME-RS485/ 209
- RS485-P Isolator 209
- Figure B-27. Network Noise 210
- INTRODUCTION 211
- Installed Boards 211
- Auxiliary Analog Inputs 214
- Trip Setup 215
- Control – PID Level Control 216
- CHILLER LEVEL CONTROL 216
- CONDENSER LEVEL CONTROL 217
- VISSION 20/20 SOFTWARE SETUP 221
- Valve Confi guration 223
- B - 64 / Blank 224
- HARDWARE WIRING 227
- Valve Control PID parameters 232
- Calculated Values 235
- Statuses 236
- Commands 238
- Setpoints 239
- Auto Cycle 240
- Pumpdown 241
- Compressor VFD 243
- Cool Compression 243
- Alarms/Trips (Page 244
- Alarms/Trips 245
- (Page 2) 245
- (Page 3) 245
- Compressor 247
- Scheduling (Military 247
- Sequencing 254
- Word 1 Word 2 259
- Word 1 Word 2 Word 3 260
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