User`s guide

DDE Item Names In PCIS-DDE • 31
4.4 PCI-7250(with/without PCI-7251)
Digital I/O Command Set
Command Item Name
Requested/Poked
value
R/W Data Type
Digital Data In PDI0…PDI3*
Data Range: 0 ~ 255
Example: 128
R Integer
Digital Data Out PDO0…PDO3*
Data Range:0 ~ 255
Example: 128
W Integer
Nth bit Digital Data In
(N is the bit number)
PBI0…PBI31* Data: 0 or 1 R Integer
Fast Nth bit Digital
Data In (N is the bit
number)
PASBI0 …
PASBI31*
Data: 0 or 1 R Integer
* The PCI-7551 cards are used as the expansion boards of the PCI-7250
board. Please refer to the PCI-7250/7251 user’s manual for the details. In
PCIS-DDE, the digital I/O ports and their related item names of
PCI-7250/7251 are defined as follows:
Card Port Item Name
PCI-7250 0 PDO0 / PDI0 / PBI0 ~ PBI7
PCI-7251#1 1 PDO1 / PDI1 / PBI8 ~ PBI15
PCI-7251#2 2 PDO2 / PDI2 / PBI16 ~ PBI23
PCI-7251#3 3 PDO3 / PDI3 / PBI24 ~ PBI31
* For InTouch, the value of Nth bit of PDOn/PDIn (n is the port number) can
be poked/advised by using Tag.0N (N is the bit number) as the item name.
For example, to poke the value of the 0th bit of PDO0, set tagname as
Tag.00, or to poke the value of the 1st bit of PDO0, set tagname as
Tag.01.
* “PASBIn” and “PBIn” (n is the bit number) commands are both used for
n-th bit digital data in. For signal bit digital data input, the performance of
these two commands are almost the same. However, for multi-bits digital
data input, using “PASBIn” can get much higher performance than “PBIn”.
Hence “PASBIn” command is especially suitable for multi-bits digital data
input.