Siemens simatic hmi op27

13-6
OP27, OP37 Equipment Manual
Release 05/99
The IF1B interface can be configured by using the DIL switches, located
beside the 9–pin Sub-D connector . This interchanges the RS422 receive data
and the R TS signal. By default, the R TS signal is not required by the commu -
nication peer .
The table shows the permissible DIL switch settings.
Commun
i
cat
i
on
Sw
i
tch Sett
i
ng
C
ommun
i
ca
ti
on
S
w
it
c
h
S
e
tti
ng
OP
PLC
RS422/RS485
1234
ON
OFF
PLC
PPI/MPI/PROFIBUS
OP
RTS on Pin 4
RTS on Pin 9 (as PU)
No RTS on connector
(default)
1234
1234
1234
ON
OFF
ON
OFF
ON
OFF
PLC
PPI/MPI
Standard
cable
OP
ON
OFF
1234
Configure interface
IF1B
Electrical Installation
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