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2. Create a Project ............................................................................................................................................. 95
3. Add Modbus Devices (When using Modbus TCP) ........................................................................... 96
4. Add Modbus Devices (When using Modbus RTU) .......................................................................... 98
5. I/O Variable Definition .............................................................................................................................. 100
6. Create and build a program ................................................................................................................... 102
7. Download and run program ................................................................................................................... 102
8. Data input and output from Modbus Master .................................................................................. 103
4. File Access............................................................................................................................................................. 106
1. File Access Library setting ........................................................................................................................ 106
2. Function list ................................................................................................................................................... 106
3. Data type ........................................................................................................................................................ 107
4. Function details............................................................................................................................................ 108
5. Sample ............................................................................................................................................................. 113
5. PLC program data retention .......................................................................................................................... 123
1. PERSISTENT Variable Definition ............................................................................................................ 123
2. Sample ............................................................................................................................................................. 124
6. Control Flow of I/O Module .......................................................................................................................... 125
1. CPSN-DI-16BCL............................................................................................................................................ 125
2. CPSN-CNT-3201I ......................................................................................................................................... 129
Maintenance ................................................................... 133
1. Maintenance ........................................................................................................................................................ 134
2. Save a File ............................................................................................................................................................. 135
1. Procedure ....................................................................................................................................................... 135
3. Write a File ........................................................................................................................................................... 136
1. Procedure ....................................................................................................................................................... 136
Troubleshooting ............................................................. 137
1. If You Encounter a Problem? ......................................................................................................................... 138
2. General ............................................................................................................................................................ 138
Appendix ........................................................................ 140
1. Hardware Specifications ................................................................................................................................. 141
2. Software Specifications ................................................................................................................................... 142
1. CPU Unit ......................................................................................................................................................... 142
2. I/O Module .................................................................................................................................................... 144
3. LED........................................................................................................................................................................... 150
4. Push Switch (SW) ............................................................................................................................................... 151
Customer Support and Inquiry .................................... 152
1. Services .................................................................................................................................................................. 153
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