Rockwell Automation 1771-QC , D17716.5.25 SER/B SERVO POS - Manual (Page 83)

Chapter
7
7Ć1
Formatting and Interpreting Data Blocks
The previous chapter told you how to install the modules. During
installation, you made hardware selections through switch and jumper
settings. These hardware selections direct some aspects of module
operation.
This chapter tells you how to make software selections through data
blocks you set up in the data table. Through data blocks you direct
module operation.
This chapter also tells you how to monitor module operation through a
data block that the module sends to the data table.
You must program the PC processor to communicate with the 1771-M3
controller through a block-transfer-read instruction and a
block-transfer-write instruction. The data blocks are:
status block
parameter block
moveset block
command block
The block-transfer-read instruction transfers status block data from the
1771-M3 controller to the data table. The block-transfer-write instruction
transfers the parameter block, the moveset block, and the command block
data from the data table to the module. (Figure 7.1).
Chapter Objectives
Relationship of Data Blocks