2-16
SIMATIC PC RI25/45, Technical Description
C79000-G7076-C808-01
S1 display type and bus clock.
x signifies that the switch is not relevant for the function described.
S1 (1)
S1 (2)
S1 (3)
Function
on
on
on
640x480 SS-STN
off
on
on
640x480 STN monochrome
on
off
on
640x480 DS-STN
off
off
off
640x480 TFT
on
on
off
reserved
off
on
off
640x480 DS-STN spec.
on
off
off
800x600 DS-STN
off
off
off
800x600 TFT (standard setting)
S2 (1)
S2 (2)
Function
on
on
active TTY port
(standard setting)
off
x
TTY transmission loop separate from
current source (passive setting)
x
off
TTYE receiving loop separate from current
source (passive setting)
Not used on the RI25/45.
S2 (3)
S2 (4)
Function
off
on
Hardware in normal operation (standard
setting)
on
x
Boot-EPROM disabled (Boot module
necessary)
x
off
Disable Boot block; ROM pages are
swapped at 32 KB
The switch positions described are for your information only. These settings
are made by the manufacturer and must not be changed.
Switch Position
Motherboard