ICP DAS USA PDS-700 Series, Руководство пользователя

Страница: 12 / 191

PDS Series User Manual ( V1.4, Oct. 2009) ----- 12
2.2. Ethernet I/O Applications
The PDS series provides 2 types of Ethernet I/O solutions:
1.
Linking to I-7000 series modules
2. Built-in DIO (if the module supports the DIO function)
Linking to I-7000 series modules
The I-7000 series provides a variety of I/O operations, such as D/I, D/O, A/D, D/A,
Counter and Frequency Measurement, etc. The I-7000 series was originally designed to be
used with RS-485 networks, so COM2 on the PDS-700 can be used to link to I-7000 series
modules.
By using VxComm technology, programs that on the host PC support serial devices
can be upgraded from a RS-485 network to an Ethernet network without requiring any
modifications to the program. Refer to Sec. 2.1 for more information.
Built-in DIO
The DCON protocol is a request
/reply communication. Protocol that
is defined using a simple ASCII
format, such as $AAN, $AASi6,
#AAN, etc. and is used to access
PDS and I-7000/8000/ 87k series I/O
modules.
The DCON protocol command
set for the PDS is introduced in Sec.
7. The protocol allows access the
built-in I/O through the virtual COM Ports mapped to the Port I/O of the PDS in the
VxComm Utility.