Allen-Bradley Micro830, Руководство пользователя

Страница: 80 / 354

66
Rockwell Automation Publication 2080-UM002K-EN-E - March 2019
Chapter 5 Communication Connections
3.
Specify a baud rate. Select a communication rate that all devices in your
system support. Configure all devices in the system for the same
communication rate. Default baud rate is set at 38400 bps.
4.
In most cases, parity and station address should be left at default settings.
5.
Click Advanced Settings and set Advanced parameters.
Refer to the table CIP Serial Driver Parameters on page 66
for a
description of the CIP Serial parameters.
CIP Serial Driver Parameters
Parameter Options Default
Baud rate Toggles between the communication rate of 1200, 2400,
4800, 9600, 19200, and 38400.
38400
Parity Specifies the parity setting for the serial port. Parity
provides additional message-packet error detection.
Select Even, Odd, or None.
None
Station Address The station address for the serial port on the DF1
master. The only valid address is 1.
1
DF1 Mode DF1 Full Duplex (read only) Configured as
full-duplex by
default.
Control Line No Handshake (read only) Configured as no
handshake by
default.
Duplicate Packet
Detection
Detects and eliminates duplicate responses to a
message. Duplicate packets may be sent under noisy
communication conditions when the sender’s retries are
not set to 0. Toggles between Enabled and Disabled.
Enabled
Error Detection Toggles between CRC and BCC. CRC
Embedded
Responses
To use embedded responses, choose Enabled
Unconditionally. If you want the controller to use
embedded responses only when it detects embedded
responses from another device, choose After One
Received.
If you are communicating with another Allen-Bradley
device, choose Enabled Unconditionally. Embedded
responses increase network traffic efficiency.
After One
Received
NAK Retries The number of times the controller will resend a
message packet because the processor received a NAK
response to the previous message packet transmission.
3
ENQ Retries The number of enquiries (ENQs) that you want the
controller to send after an ACK timeout occurs.
3
Transmit Retries Specifies the number of times a message is retried after
the first attempt before being declared undeliverable.
Enter a value from 0…127.
3
ACK Timeout
(x20 ms)
Specifies the amount of time after a packet is
transmitted that an ACK is expected.
50