VIPA CPU 21 Series - Chapter 9 Deployment CPU 21 xSER-1

Manual VIPA CPU 21x Chapter 9 Deployment CPU 21xSER-1
HB103E - Rev. 05/45 9-1
Chapter 9 Deployment CPU 21xSER-1
Content of this chapter is the deployment of the CPU 21xSER-1 with
RS232C/RS485 interface.
Here you’ll find all information about the deployment of the serial interfaces
of the CPU 21xSER-1.
The following description includes:
• Principles of the serial communication
• Usage of the protocols ASCII, STX/ETX, 3964R, USS and Modbus
• Deployment of the serial RS232C/RS485 interface
• Example Modbus communication
Topic Page
Chapter 9
Deployment CPU 21xSER-1............................................ 9-1
Fast introduction...................................................................................9-2
Protocols and procedures ....................................................................9-3
Deployment of the serial interface........................................................9-7
Principles of data transfer.....................................................................9-8
Parameterization................................................................................ 9-10
Communication ..................................................................................9-14
Modbus slave function codes ............................................................. 9-20
Modbus – Example communication.................................................... 9-24
Overview
Content