Fast Introduction - YASKAWA VIPA System 200V Manual

Chapter 4 Serial communication

Fast introduction

General
Protocols
Parameterization
Communication
4-2
The CPU 21x-2BS03 provide serial interfacing facilities between the
processes of different source and destination systems. The CPU has got 2
serial RS232 interfaces.
The communication happens via handling blocks that are stored in the CPU
as library.
The CPU supports the ASCII, STX/ETX, 3964(R) and RK512 protocols.
For the parameter transfer to the communication processor (CP), you have
to execute SEND (SFC 230) with order no. 201 during runtime. For this you
store the parameters in a DB where the structure depends on the wanted
protocol.
To activate the parameters, you execute a RESET (SFC 234) with order
no. 0 after the SEND.
Note!
Please regard that the commands SEND, RECEIVE, FETCH and RESET
require a preceding "RLO"=1 (result of logic operation) otherwise they are
not executed.
The internal CP of the CPU 21x-2BS03 is directly connected to the CPU
part via a Dual-Port-RAM, also called "page frame". This page frame is
available at the CPU section as standard CP interface. The data transfer
happens via the standard handling blocks (SEND, RECEIVE and FETCH).
The communication via the according protocols is controlled by connection
commands that are programmed in the user application.
The following SFCs are used:
SFC Name
SFC 230 SEND
SFC 231 RECEIVE
SFC 232 FETCH
SFC 233 CONTROL
SFC 234 RESET
SFC 235 SYNCHRON Synchron for page frame communication
SFC 236 SEND_ALL
SFC 237 RECV_ALL
Manual VIPA System 200V
Description
Send via page frame (page frame comm.)
Receive via page frame (page frame comm.)
Fetch via page frame (page frame comm.)
Control for page frame communication
Reset for page frame communication
Send_All via page frame (page frame comm.)
Receive_All via page frame (page frame com.)
HB97E - CPU - RE_21x-2BS03 - Rev. 15/16