Rockwell-automation 1799-DASCII DeviceNet Serial Interface Manual do Utilizador descarregar pdf (Página 20)

20 DeviceNet Serial Interface Module

Publication 1799-IN012B-EN-P - July 2008

Serial Character Framing (parameter 1)

This defines the number of data bits and stop bits used in each character's data

frame. It also defines the type of character frame parity used.

Serial Comm Speed (parameter 2)

This defines the baud rate options available on the serial port.

RTS/CTS Hardware Handshaking (parameter 3)

With an RS232 connection, the 1799-DASCII module supports hardware

handshaking for data exchange via RTS/CTS control lines on the DB9 connectors.

When used with an ASCII device that also supports hardware handshaking, the RTS

and CTS lines are used to meter data flow between the module and device and

prevent data buffer overflow. This option can be enabled and disabled via

software.

Parameter # Access Description Parameter Choices Default

Setting

Default

Value

Data

Type

Serial Port Parameters

Serial port

character

framing

Get/Set Defines number

of data bits,

stop bits, and

parity in data

character

frame.

0 = 7N2

1 = 7E1

2 = 7O1

3 = 8N1

4 = 8N2

5 = 8E1

6 = 8O1

7 = 7E2

8 = 7O2

8N1 3 USINT

Serial port

comm

speed

Get/Set Defines baud

rate of serial

port.

0 = 9600

1 = 1200

2 = 2400

3 = 4800

4 = 19.2 k

5 = 38.4 k

6 = 57.6 k

7 = 115.2 k

9600

baud

0USINT

Serial port

hand-

shaking

Get/Set Enables

RTS/CTS

hardware

handshaking on

serial port.

0 = RTS/CTS disabled

1 = RTS/CTS enabled

Disabled 0 USINT

1 2 ... 15 16 17 18 19 20 21 22 23 24 25 ... 35 36

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