Overview; Communication Specifications - Toshiba RS4002Z-0 Instruction Manual

1. Overview

By using RS485 Converter Unit, a network can be constructed that allows communication between a
host computer or PLC etc. and multiple inverter units.
A maximum of 32 Option Units can be connected on the same network. And 8 inverters can be
connected to one RS485 Converter Unit. A maximum of 256 inverters
network.
Only when communicating between inverters, and the number is limited when communicating with
＊
individual inverters depending on the function of each inverter.)
<System configuration>
Host computer
INV INV INV
(*) A maximum number of inverters connectable is 32 × 8 = 256. This number applies only to
communications between inverters. Up to 248 units can be connected in broadcast
communication. In the case of individual communications, the number is limited by the
function of each inverter.
Check the transmission format specification of the inverter to be used.
Example of VF-A7 series inverter
・Communication between inverters:
・Broadcast communication:
・Individual communication (ASCII mode):
・Individual communication (binary mode):
2.

Communication specifications

Interface
Configuration
Transmission method
Communication Distance
Number of option units connectable
Number of inverters connectable per option unit 8 units maximum
Number of inverters on the Same Network
Communication Line Isolation
Communication Speed
Bit length
RS485
Connection with up to
RS4002Z
8 inverters
INV INV INV
INV
Item
INV INV
RS4002Z
INV INV INV INV
32 × 8 = 256 units max
31 × 8 = 248 units max
(31 units because of 1 unit needed for PC.)
100 units max
64 units max
Conforming to EIA RS485 standard
4-wire/2-wire, bus type (A terminating resistor is
required at both ends of the system)
Semi-duplex
1,000m maximum
32 units maximum (31 units when PC is connected)
256 units maximum （※）
Not isolated
1200/2400/4800/9600/19200 baud selectable
(parameter and switch selection)
11 or12 bits (switch selectable)
−5−
E6580938
can be connected on the same
＊
INV INV INV
Specifications