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12.2.3 Relays 12- 11
12.2.4 Noise reduction techniques 12- 11
13. COMMUNICATION FUNCTIONS 13- 1 to 13- 26
13.1 Configuration 13- 1
13.1.1 RS-422 configuration 13- 1
13.1.2 RS-232C configuration 13- 2
13.2 Communication Specifications 13- 3
13.2.1 Communication overview 13- 3
13.2.2 Parameter setting 13- 4
13.3 Protocol 13- 5
13.4 Character Codes 13- 6
13.5 Error Codes 13- 7
13.6 Checksum 13- 7
13.7 Time-Out Operation 13- 8
13.8 Retry Operation 13- 8
13.9 Initialization 13- 9
13.10 Communication Procedure Example 13- 9
13.11 Command and Data No. List 13- 10
13.11.1 Read commands 13- 10
13.11.2 Write commands 13- 11
13.12 Detailed Explanations of Commands 13- 13
13.12.1 Data processing 13- 13
13.12.2 Status display 13- 15
13.12.3 Parameter 13- 16
13.12.4 External I/O pin statuses (DIO diagnosis) 13- 18
13.12.5 Disable/enable of external I/O signals (DIO) 13- 19
13.12.6 External input signal ON/OFF (Test operation) 13- 20
13.12.7 Test operation mode 13- 21
13.12.8 Output signal pin ON/OFF (DO forced output) 13- 23
13.12.9 Alarm history 13- 24
13.12.10 Current alarm 13- 25
13.12.11 Other commands 13- 26