Serial Communication Function; Outline - Sanken SVCO6 Instruction Manual

7-4

Serial Communication Function

7-4
Serial Communication Function
7-4-1

Outline

● The serial communication function is an interface function that controls the inverter using serial signals from a
computer. It can control inverter start/stop, frequency setting, operation status monitoring and function code reading
& setting.
● An RS485 communication interface is embedded in the inverter. With this interface, the computer can control
multiple inverters.
● The communication mode is RS485, SANKEN protocol and Modbus-RTU protocol can be used for RS485.
● The Modbus communication is composed with a master computer (PLC or PC) and up to 254 lower computers.
(248-254 are reserved.)
● In SANKEN protocol of RS485, one master computer and up to 32 inverters can be connected.
● The followings are communication specifications.
Electrical characteristic
Communication
provision
Communication form
Transmission distance
Number of connections
Connection cable
Communication mode
Communication speed
[bps]
Synchronization mode
Data form
Data length
Stop digit
Parity check
Error correction
Message
end code
BINARY
Note: SANKEN protocol is the dedicated protocol used by our company (F4005=1).
*Note: When the number exceeds 32, a relay must be installed.
SANKEN protocol
Terminal resistance must be connected
Up to 32
Shielded Twisted-Pair is recommended
Full duplex communication/Half duplex communication
Selectable 57600/38400/19200/9600/4800/2400/1200
ASCII or BINARY
Yes(even, odd)
Data and correction
ASCII
Selectable CR＋LF/CR
No
RS485 Communication
Modbus-RTU protocol
Bus form of 4-wire/2-wire
(RS485 standard)
Total extension 500m
Up to 247*Note
Synchronization of start/stop
BINARY
8bit
Selectable 1bit or 2bit
No Selectable
CRC correction
- 256 -
No