Instruction manual

IMR01H02-E3
i-3
CONTENTS
Page
1. OUTLINE ...............................................................................1
2. SPECIFICATIONS.................................................................2
3. WIRING .................................................................................5
4. SETTING ...............................................................................8
4.1 Transfer to Setup Setting Mode ......................................................................8
4.2 Setting the Communication Parameters..........................................................9
4.3 Communication Requirements ......................................................................13
5. RKC COMMUNICATION PROTOCOL ...............................15
5.1 Polling............................................................................................................15
5.1.1 Polling procedures ............................................................................................16
5.1.2 Polling procedure example (Multi-point mode) ..................................................21
5.1.3 Polling procedure example (Single mode) ........................................................24
5.2 Selecting........................................................................................................25
5.2.1 Selecting procedures........................................................................................25
5.2.2 Selecting procedure example (Multi-point mode) ..............................................30
5.2.3 Selecting procedure example (Single mode) ....................................................33
5.3 Communication Identifier List ........................................................................34
6. MODBUS COMMUNICATION PROTOCOL .......................44
6.1 Message Format ...........................................................................................44
6.2 Function Code ...............................................................................................45
6.3 Communication Mode ...................................................................................45
6.4 Slave Responses ..........................................................................................46
6.5 Calculating CRC-16.......................................................................................47