Allen-Bradley PLC-5 - Page 7

Publication 1785-UM012D-EN-P - July 2005
Table of Contents 3
Block-Transfer Programming Considerations . . . . . . . . . . . . . . . . . 6-19
General Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-19
For Controller-Resident Local Racks . . . . . . . . . . . . . . . . . . . . . 6-20
Monitoring Remote I/O Scanner Channels . . . . . . . . . . . . . . . . . . . 6-21
Monitoring transmission retries . . . . . . . . . . . . . . . . . . . . . . . . . 6-21
Addressing the I/O Status File . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-24
Chapter 7
Communicating with a PLC-5
Adapter Channel
Using This Chapter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-1
Configuring Communication to a PLC-5 Adapter Channel . . . . . . . 7-2
Specify an Adapter Channel’s Communication Rate,
Address, and Rack Size . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-3
Specify the Discrete Transfer Configuration Files. . . . . . . . . . . . 7-5
Programming Discrete Transfers in Adapter Mode. . . . . . . . . . . . . 7-10
Programming Block-Transfers of Data to an Adapter Channel . . . 7-10
Configure Block-Transfer Requests . . . . . . . . . . . . . . . . . . . . . . 7-11
Examples of Block-Transfer Ladder Logic
Effects of Programming Block-Transfers to an Adapter-Mode
Controller Channel on Discrete Data Transfer . . . . . . . . . . . . . 7-15
Monitoring the Status of the Adapter Channel . . . . . . . . . . . . . 7-17
Monitoring the Status of the Supervisory Controller. . . . . . . . . 7-18
Monitoring Remote I/O Adapter Channels. . . . . . . . . . . . . . . . . . . 7-19
Chapter 8
Communicating with
Extended-Local I/O
Using This Chapter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-1
Selecting Devices That You Can Connect . . . . . . . . . . . . . . . . . . . . . 8-1
Cabling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-2
Addressing and Placing I/O . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-2
Transferring Data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-4
Discrete Data Transfer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-5
Transferring Block Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-6
Calculating Block-Transfer Completion Time . . . . . . . . . . . . . . . 8-7
Considerations for Extended-local Racks. . . . . . . . . . . . . . . . . . . 8-8
Configuring the Controller as an Extended-Local I/O Scanner . . . . 8-9
Monitoring Extended-Local I/O Status . . . . . . . . . . . . . . . . . . . . . . 8-12
Chapter 9
Communicating with Devices on a
DH+ Link
Using This Chapter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-1
Selecting Devices That You Can Connect . . . . . . . . . . . . . . . . . . . . . 9-1
Link Design . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-2
Configuring the Channel for DH+ Communication . . . . . . . . . . . . . 9-3
Using the Global Status Flag File . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-5
Monitoring DH+ Communication Channels. . . . . . . . . . . . . . . . . . . 9-7
Monitoring Data Sent with Acknowledgment . . . . . . . . . . . . . . . 9-8
Monitoring Data Sent without Acknowledgment . . . . . . . . . . . 9-10