IMR02E20-E1
i-7
Page
10. TROUBLESHOOTING .................................................... 101
11. SPECIFICATIONS .......................................................... 106
APPENDIX. HOST COMMUNICATION PROTOCOL .......... 110
A.1 Communication Requirements .................................................................... 110
A.2 RKC Communication Protocol .................................................................... 112
A.2.1 Polling
procedures
............................................................................................................... 112
A.2.2 Selecting
procedures
........................................................................................................... 118
A.2.3 Communication data structure ............................................................................................. 123
A.3 Modbus Protocol ......................................................................................... 125
A.3.1 Message
format
................................................................................................................... 125
A.3.2 Function
code
...................................................................................................................... 126
A.3.3 Communication
mode
.......................................................................................................... 126
A.3.4 Slave
responses
.................................................................................................................. 127
A.3.5 Calculating
CRC-16
............................................................................................................. 128
A.3.6 Register read and write ....................................................................................................... 131
A.3.7 Caution for handling communication data ........................................................................... 135
A.3.8 How to use memory area data ............................................................................................ 136