Appendix
G SM277A Module
【Main feature】
Adopt a photoelectric isolation technique, high reliability and strong anti-interference ability.
Integrated terminal resistance, the bus adopt connection mode, no need dedicated network
tap.
The power supply includes anti - access protection and Surge absorption function, it's suitable
for bad industrial environment.
【Terms of use】
The signal wire should use shielded twisted pair wires, and the double end of the shielded wire
should connect to the ground.
The grounding terminal should connect to the earth wire while the system is under good
grounding cases.
If it's the last station, the terminal resistance should set to the ON position.
PROFIBUS-DP network
【Communication】
PROFIBUS-DP network connect to SM277A DP slave station module by its DP communication
port, while SM277A DP slave station module connect to CTH200 CPU through serial I/O bus.
SM277A use terminal to connect PROFIBUS network without using standard connector.
【Function】
SM277A is a modular slave station device for PROFIBUS DP networks that can connect up to 6
extended modules for digital or analog I/O.
As a DP slave station, the SM 277A module can run on any PROFIBUS baud rate between 9600
and 12M. Also receives a variety of I/O configurations and different amounts of data from the
main station and sends data to the main station. The SM277A can also read and write variable
data blocks defined in the CTH200 CPU, allows user to exchange any type of data with master
station.
MPI network
【Communication】
The SM277A module communicate with other master stations on the same network such as
PG/PC programming station, Copanel HMI or S7-300/S7-400CPU as an MPI slave station. Use
XGET/XPUT instruction function of S7-300/400 and other main station modules to provide the
network communication between MPI main station and CTSC-200. When the SM277A module
conducts MPI communication, the MPI master station must use its station address to send
information to the CTH200 CPU. The MPI information sent to the SM277A module will be
transmitted to the CTH200 CPU via SM277A.
【Function】
To Next Page
Loading...
Need help?
General