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8 Communications Functions
High-function General-purpose Inverter 3G3RX-V1 User’s Manual (I578-E1)
8-6 ASCII Method
8
8-6-2 Communications Commands
Sets frequency reference. (To use this command, set the Frequency Reference Selection (A001) to 03
(RS485).)
• Transmission Frame
* To set 5 Hz for station 01
(STX)01 01 000500(BCC)(CR)
ASCII conversion 02 30 3130 3130 30 30 35 30 3030 350D
Note Data is 100 times the set value.
Example. 5 [Hz] → 500 → 000500 ASCII conversion 30 30 30 35 30 30
Note
To use Data as the PID control feedback data, set its MSB to 1.
Example. 5 [%] → 500 → 100500 ASCII conversion 31 30 30 35 30 30
• Response frame
Normal response: Refer to page 8-92
Error response: Refer to page 8-93
Command 01
Frame format
STX Station
No.
Command Data BCC CR
Description Data size Setting
STX Control code (Start of Text) 1 byte STX (0x02)
Station
No.
Station No. of target Inverter 2 bytes
01 to 32, and FF (Broadcast to all
stations)
Command
Transmission command 2 bytes 01
Data
Transmission data (Decimal ASCII
code)
6 bytes *
BCC Block check code 2 bytes
Exclusive OR of frame segments from
Station No. to Data (Refer to page 8-94.)
CR Control code (Carriage Return) 1 byte CR (0x0D)
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