Panasonic VF100 - 12 Supplementary Explanation; Supplementary Explanation of Communication Function; About Communication Protocol; General Remarks on MEWTOCOL-COM in Inverter

To Next Page

To Previous Page

12. Supplementary Explanation of Communication Function

12-1. About communication protocol

VF100 conforms to two protocols that are "MEWTOCOL-COM" and "MOD-BUS (RTU)".

In any event, 1: N communication is always applied.

・ "MEWTOCOL-COM"

Communication protocol used for programmable logic controller (PLC) in our company.

・ "MOD-BUS (RTU)"

Communication protocol applicable to programmable logic controller (PLC) developed

by the U. S.

12-2. General remarks on MEWTOCOL-COM in inverter

Host computer transmits command (order) to the inverter, and receives response (answer)

from the inverter.

According to this step, by means of session between host computer and inverter, the host

computer can receive or transmit various messages.

Text

Command message

Response message (normal)

・ASCII code transmission.

・Original transmission right belongs to the host computer.

・Each time a command message is transmitted, the transmission right will be transferred.

Host

computer

Inverter

Code

inspection

Header

Transmission

destination

Terminator