Omron SYSMAC CS Series Operation Manual page 32

PROFIBUS Master Unit
PROFIBUS DP Class 2
Services
PROFIBUS DP-V1
Services
Configuration
Troubleshooting
Functions
For diagnostics purposes the PROFIBUS Master Unit collects all Slave Diag-
nostics messages, which it can transfer to the PLC memory, using FINS com-
mands. From every allocated slave device it can receive up to 244 bytes of
diagnostics data.
The PROFIBUS Master Unit also supports additional PROFIBUS DP Class 2
services defined in the PROFIBUS DP standard EN50170, Volume 2 for Mas-
ter - Slave Communication. These functions includes the following services:
• Set_Slave_Addr
• Get_Cfg
• Rd_Inp
• Rd_Outp
These services can be invoked from the PLC CPU using FINS message com-
munication.
The PROFIBUS Master Unit supports PROFIBUS DP-V1 Class 1 and Class 2
services. Additional parameter data can be written/read to and from PROFI-
BUS DP-V1 compatible slave devices. These services can be initiate either
from the PLC CPU or from the associated DTM.
Before the PROFIBUS Master Unit can control the PROFIBUS network, it
must be configured, using the dedicated configuration program CX-Profibus.
Without this configuration, the Unit will not be able to achieve data exchange,
neither to send any acyclic messages. The configurator is explained in section
1-4 CX-Profibus Configurator.
The PROFIBUS Master Unit is provided with a variety of troubleshooting func-
tions for prompt recovery in case of errors:
• Extensive self-diagnostic function at startup
• Data exchange flags, indicating if I/O data is being exchanged with the
slave devices
• Diagnostics flags, indicating if new Slave diagnostics data is available
• Extensive status and error flags, indicating the status of the Unit and the
PROFIBUS network
• Error log for recording error history data.
Section 1-3
11