ABB NCSA-01 CS 31 Quick Installation And Start-up Manual

ABB NCSA-01 CS 31 Quick Installation And Start-up Manual Manual pdf 25 page image

NCSA-01 Installation and Start-up Guide6-1Chapter 6 – CommunicationContents This chapter describes the contents of the messages used forcommunication between the CS 31 and the drive. Also introduced arethe addresses in the CS 31 master register areas into which the drivedata is written.CS 31 Messaging In the CS 31 system, the master sends messages cyclically to eachslave station. Each slave responds to messages with the correctaddress and takes the actions requested by the master. The messageframes consist of a start/identification byte, one to three data sets, andan error check byte.Note: Only cyclic drive control and feedback data can be transmittedvia the CS 31 bus. The parameters of the drive cannot be read oradjusted through the CS 31 bus.Memory Mapping The input/output memory system of the CS 31 master is dividedbetween the devices connected to the CS 31 bus. The memory areasare as follows:The NCSA-01 can be used either in Binary or Word Mode (seeparameter 03 MODULE ID in Chapter 5). The control data can bemodified by the CS 31 master program either on a bit(A XX,YY) orword(AW XX,YY) basis, whereXX is the address (station number) ofthe NCSA-01 module andYY is the address of the variable. Fordetailed information on selecting the appropriate mode, consult theCS 31 Program Manual.Binary inputs of CS 31 remote modules E00,00 … E57,15Binary outputs of CS 31 remote modules A00,00 … A57,15Word inputs of CS 31 remote modules EW00,00 … EW5,15Word outputs of CS 31 remote modules AW00,00 … AW5,15