Individual Functions
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93
Individual Functions
This section explains the individual functions used in special applications.
Using MEMOBUS Communications
You can perform serial communications with MEMOCON-series Programmable Controllers (PLCs) or simi-
lar devices using the MEMOBUS protocol.
MEMOBUS Communications Configuration
MEMOBUS communications are configured using 1 master (PLC) and a maximum of 31 slaves. Serial com-
munications between master and slave are normally started by the master, and the slave responds.
The master communicates with the specified slave, which is the Inverter. Consequently, you must set the
address of each slave beforehand, so the master can perform signal communications using that address. Slaves
receiving commands from the master perform the specified function, and send a response to the master.
Fig 6.59 Example of Connections between PLC and Inverter
Communications Specifications
The MEMOBUS communications specifications are shown in the following table.
Item Specifications
Interface RS-422, RS-485
Communications Cycle Asynchronous (Start-stop synchronization)
Communications Parameters
Baud rate: Select from 1,200, 2,400, 4,800, 9,600, and 19,200 bps.
Data length: 8 bits fixed
Parity: Select from even, odd, or none.
Stop bits: 1 bit fixed
Communications Protocol MEMOBUS (RTU mode only)
Number of Connectable Units 31 units max. (when using RS-485)
MEMOCON-series PLC
RS-485 connections
example
Inverter Inverter Inverter
TOE-S616-60.1.book 93 ページ ２０１７年８月４日 金曜日 午後３時４１分
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