Toshiba TOSVERT VF-S15 series User Manual

E6581913
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5.1.Modbus RTU transmission format
Modbus RTU sends and receives binary data without a frame-synchronizing start code and defines
the blank time to recognize the start of a frame. Modbus RTU decides the data that is first received
subsequently as the first byte of a frame after a blank time for 3.5 bytes at the on-going communica-
tion speed.
【Request format / Positive response】
CRC16
Inverter
No.
Command
Data
low high
(3.5bytes
Blank)
1byte 1byte variable length
１byte １byte
(3.5bytes
Blank)
1) Inverter No. (1 byte) : Specify an inverter number between 0 and 247 (00H to F7H).
Command processing will be executed only broadcast communication “0” and with
those inverters that match set inverter numbers. Data will not be returned if “0”
(broadcast communication) and inverter numbers do not match. Don’t use the
number between 248 and 255(F8H to FFH) for inverter option and shipment test.
2) Command (1 byte) : Set the command. Refer to section 5.1.7 from 5.1.1
Command
Decimal Hex
Function Reference Remarks
Read
Read the data with the specified
communication number.
5.1.1
Block read communication (Indirect) 5.1.2
03 03H
Block read
Block read communication (Direct) 5.1.3
06 06H 5.1.4.1
16 10H
Write
Write the data with the specified
communication number.
(RAM and EEPROM).
5.1.4.2
16 10H Block write Block write communication (Indirect) 5.1.5
23 17H Block write and read
Block write and read communication
(Indirect)
5.1.6
43 2BH Identification
Reads the Inverter information
(manufacture , type format , software
version)
5.1.7
3) Data (variable ｌength) : Set the data requested by command.
4) CRC (2 bytes) : Set generation results of CRC in the order of low to high numbers. For the method
to generate CRC, see “5.2. CRC Generation”. Note that the setting sequence is
reversal to that of others.
【Negative response】
CRC16
Inverter
No.
Command
Error code
low high
(3.5bytes
Blank)
1byte Requested command
+ 80H
See ”5.3. Error codes”.
１byte １byte
(3.5bytes
Blank)
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Toshiba TOSVERT VF-S15 series Specifications

General

Brand	Toshiba
Model	TOSVERT VF-S15 series
Category	Inverter
Language	English