Table of Contents
Advertisement
08.89
5.1.1
User interfaces
The PLC provides to the user 32 input and output interfaces each (see figure "User
interfaces").
The input interfaces are in DB 101 and the output interfaces in DB 102.
The computer link software of the PLC is responsible for the data transfer between the user
interfaces (DB 101, DB 102) and the input/output buffers in the multiport RAM.
MPR
COM
O
I
O
I
I
O
I
O
User interfaces
© Siemens AG 1989 All Rights Reserved
SINUMERIK 840/880 (PJ)
PLC
Buffer
input
DB34
PLC
OS
Buffer
output
DB35
6FC5 197-0AB20-0BP0
5.1.1 User interfaces
DB101
User
interface
input 0-31
Std.sig.
input
STEP5
Standard
routines
DB102
Std.sig.
output
User
interface
output 0-31
5 PLC
5–3
Advertisement
Table of Contents
