DATA TRANSMISSON REQUIRMENTS DATA TRANSMISSON-SERIAL SYSTEM (PORT) RS232 PLC (PORT) DF PORT BAUD RATE -9.6KBPS TO 19.2 KBPS ...
DATA TRANSMISSON REQUIRMENTS
DATA TRANSMISSON-SERIAL- SYSTEM (PORT) RS232
- PLC (PORT) DF PORT
- BAUD RATE -9.6KBPS TO 19.2 KBPS
- PROFRAMMING SOFTWARE -S7 200
Throughout this course we will be using the S7-200 PLC for specific examples of PLC concepts. The S7-200 PLC is used for this purpose because of its ease of use and wide-spread application.
The items shown in the following illustration are needed to create or change an S7-200 PLC program. The program is created using STEP 7-Micro/WIN programming software, which runs on a Windows-based personal computer (Win2000,
Windows XP, and higher operating system). A special cable is needed when a personal computer is used as a programming device. Two versions of this cable are available. One version, called an RS-232/PPI Multi-Master Cable, connects a personal computer’s RS-232 interface to the PLC’s RS-485 connector. The other version, called a USB/PPI Multi- Master Cable, connects a personal computer’s USB interface to the PLC’s RS-485 connector.
Profibus/MPI
Profibus
PROFIBUS in the SIMATIC open, multivendor communication system represents
the network at the cell and field level.
PROFIBUS is available in two versions:
- PROFIBUS DP field bus for fast cyclic data exchange, and PROFIBUS-PA for
the intrinsically safe area.
- The cel level as PROFIBUS (FDL or PROFIBUS-FMS) for fast data exchange
with communication partners equipped with equal rights.
However, you can also implement PROFIBUS DP and PROFIBUS-FMS with
MPI
MPI is a small subnet with just a few nodes at the field/cell level. It is a multi point capable
interface in SIMATIC S7/M7 and C7, intended for operation as PG
interface for networking just a few CPUs or for exchanging small volumes of data
with PGs.
MPI always retains the last configuration of the transmission rate, node number
and highest MPI address, even after memory reset, voltage failure or deletion of
the CPU parameter configuration.
These maximum transmission rates are possible:
MPI
12 Mbps with CPU 318-2 DP
187.5 Kbps with all other CPUs
PROFIBUS DP 12 Mbps
COMMENTS