character U in the signal name. There are no pull-down resistors available on the PiFace
Digital.
All the input and output flags for the PiFace Digital expansion board are prepared
by default in the folder
C:\Program Files (x86)\REX Controls\REX <version>\Examples\PiFaceDigital_examples\
00_IO_Flags
.
Figure 2.4: Input and output flags when using PiFace Digital
The numbering of the screw terminals of the PiFace Digital is depicted in Fig.
2.5
.
It is also possible to read/write all eight inputs/outputs of PiFace Digital at once.
This is faster than working with the individual signals. In that case the user must use
the
INOCT
and
OUTOCT
blocks named
RPI__PFI
and
RPI__PFO
respectively.
Multiple PiFace Digital boards
It is assumed by default, that the PiFace Digital board is configured to have the address
0
. If it is not the case, the address must be included in the input/output flag. E.g.
RPI__PFO3C2
refers to the 4th output of the PiFace Digital card with address
2
.
2.2.3
The UniPi expansion board
Necessary
IODRV
block configuration for UniPi expansion board:
8
