6Others

RS-232C Interface

Control of this unit via a computer is possible by connecting the computer to this unit with a RS-232C cross cable (D-Sub 9 pin).

RS-232C Specifications

This unit

 

Pin No.

Signal

Function

Signal Direction





2

RxD

Receive data

PC→This unit





3

TxD

Transmit data

This unit→PC

 

 

 

 

 

 

5

GND

Signal ground

-

 

 

1,4,6 - 9

N/C

-

-

●PC refers to the controller such as a personal computer.

Mode

Non-synchronous

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Character Length

8 bit

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Parity

None

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

D0

D1

D2

D3

D4

D5

D6

D7

 

 

 

Start Bit

1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Stop Bit

1

Start Bit

 

Stop Bit

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Data rate

19200 bps

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Data format

Binary

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Command Format

The command between this unit and the computer consists of “Header”, “Unit ID”, “Command”, “Data” and “End”.

●Header (1 byte), Unit ID (2 bytes), Command (2 bytes), Data (n bytes), End (1 byte)

■Header

This binary code indicates the start of communication.

Binary code

Type

Description

21

Operating command

PC→This unit

 

 

 

3F

Reference command

PC→This unit

 

 

 

40

Response command

This unit→PC

 

 

 

 

 

This unit→PC

06

ACK

(When the command is accepted without error, it returns to

 

 

PC)

■Unit ID

This code specifies the unit. The binary code is fixed at “8901”.

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