Omron CS1W-PRM21 - Page 26

12
PROFIBUS-DP Master Unit
Section 1-3
Protocol Specification
FINS messaging
Reading Slave station diagnostics The MEMORY AREA READ (0101) FINS command can be used to
obtain the last received Slave Diagnostics message.
Reading and controlling the error log The internal error log records the history of error events. The Unit
supports the following Error Log related FINS commands:
• ERROR LOG READ
• ERROR LOG CLEAR
Station state changes Allocated Slave stations can be disabled and enabled in order to
temporarily remove them from data exchange services. The internal
error log records the history of error events. The Unit supports the
following FINS commands to implement this:
•RUN
•STOP
Error log
Error history size and storage The PROFIBUS Master unit supports storage of up to 80 error
events, including time stamps in volatile memory.
16 error events can be logged in non-volatile memory
Item Specification
Item Specification
PROFIBUS interface
Applicable standards EN50170, Volume 2
Protocol type supported PROFIBUS-DP
PROFIBUS Unit types PROFIBUS-DP Class 1 Master
PROFIBUS Media type RS-485, galvanically isolated from the PLC
PROFIBUS Connector 9-pin sub-D female connector (#4/40 UNC thread)
Termination to be provided by the cable connector according to
EN50170
Unit station address range
0 ~ 125, set through Configurator
Number of slave stations supported
125 max, address range
0 ~ 125
baud rates supported Selectable through Configurator:
• 9.6 kbit/s
• 19.2 kbit/s
• 45.45 kbit/s
• 93.75 kbit/s
• 187 kbit/s
• 500 kbit/s
• 1.5 Mbit/s
•3 Mbit/s
•6 Mbit/s
• 12 Mbit/s
Bus timing definitions Calculated by Configurator
PROFIBUS-DP Services
Master Class 1 - Slave cyclic services • Set_Prm
• Chk_Cfg
• Data_Exchange
• Slave_Diag
• Global_Control - CLEAR
Master Class 1 - Slave acyclic services Not supported
Master Class 1 - Slave services
available to the PLC
Global_Control, initiated from CIO Word:
Can be addressed to all slave stations or a specified group of
slaves stations
Supported commands:
• SYNC
• UNSYNC
• FREEZE
• UNFREEZE
Master - Master services Not supported