Allen-Bradley 1747-SDN DeviceNet Scanner Module

Allen-Bradley 1747-SDN DeviceNet Scanner Module

Description

The 1747-SDN, Series D module includes these firmware enhancements.

• ADR user memory space increased from 64K to 256K
• Support added for Online Scanlist Changes in Run Mode. This feature allows scanlist changes to be downloaded to the scanner when the both the SLC processor and the scanner are in RUN mode.
• Scanner CCV attribute supported, provides optimization for RSNetWorx. Refer to the SLC 500 DeviceNet Scanner Module User Manual, publication 1747-UM655, for additional information on these new enhancements.

The 1747-SDN Series D module includes all features provided in the Series C module. 

Features

Slave Mode：Slave mode allows processor-to-processor communication and enables the scanner to perform as a slave device to another master on the network. When the scanner module is in slave mode, it exchanges data with only one master. You control what information is exchanged through scan list configuration and associated mapping functions of RSNetWorx for DeviceNet software.

Poll：A poll message is a point-to-point transfer of data (0…255 bytes) sent by the scanner module that solicits a response from a single device. The device responds with its input data (0…255 bytes).

Strobe：A strobe message is a multicast transfer of data (64 bits in length) sent by the scanner module that solicits a response from each strobed slave device. There is one bit for each of the possible 64 node addresses. The devices respond with their data, which can be as much as 8 bytes.

Change of State：

  Change of state enables the scanner module to perform a scan:

• whenever a network data change occurs.
• at a user-configurable heartbeat rate.

Because data is only sent on an as-needed basis, this feature increases system performance by reducing network traffic.

Cyclic I/O：Cyclic I/O allows you to instruct the scanner module to perform a scan at a specific send rate. Because data is only sent at a periodic rate, this feature increases system performance by reducing network traffic.

Pass-through：The SLC 500 pass-through feature allows communication with the DeviceNet network from another network. This feature can be used to adjust and fine tune the nodes on your network. The pass-through feature is not intended to replace a 1770-KFD, 1784-PCD, 1784-PCID, or 1784-PCIDS connection to the network. To use the pass-through feature you must meet the following hardware, software and firmware requirements.

U2DN module：The pass-through feature is not intended to replace a 1784-U2DN, 1770-KFD, 1784-PCD, 1784-PCID, or 1784-PCIDS connection to the network.

Technical Specifications