Toshiba TOSVERT VF-AS3 Instruction Manual page 33

Outline of IO scanning service
The IO Scanning service is used to exchange I/O data between controller (PLC) and inverter. It is usually
performed by implicit services, thus avoiding the need to program the controller (PLC).
The IO Scanning service operates if it has been enabled in the PLC with function code 0x17.
When you use the I/O scanning service, set the "255" (0xFF) to the Unit ID.
Time out detection time of IO scanning service can be changed by parameter [C666: Emb Eth. I/O scan
].
timeout detection time
Word register setup
Up to eight of the Read/Write register data will be exchanged by the I/O scan services using Modbus
function code 0x17. By parameter setting of C641-C648, C651-C658, you can assign command / monitor
parameters for each register.
Since the No. 0 of register is in the reservation data, please use the register No. 1 to No. 8.
Register No. Output variables (written by IO Scanner)
0 Reserved
1 Scanner write word 1 (selected by [C641])
2 Scanner write word 2 (selected by [C642])
3 Scanner write word 3 (selected by [C643])
4 Scanner write word 4 (selected by [C644])
5 Scanner write word 5 (selected by [C645])
6 Scanner write word 6 (selected by [C646])
7 Scanner write word 7 (selected by [C647])
8 Scanner write word 8 (selected by [C648])
9-31 Reserved
Input variables (read by IO Scanner)
Reserved
Scanner read word 1 (selected by [C651])
Scanner read word 2 (selected by [C652])
Scanner read word 3 (selected by [C653])
Scanner read word 4 (selected by [C654])
Scanner read word 5 (selected by [C655])
Scanner read word 6 (selected by [C656])
Scanner read word 7 (selected by [C657])
Scanner read word 8 (selected by [C658])
Reserved
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