Omron SYSMAC CS Series Operation Manual page 281

C200HW-PRM21 Notes
Control Words
The control words for the C200HW-PRM21 PROFIBUS DP Master Unit to allow the PLC CPU program to ini-
tiate actions with respect to the PROFIBUS network. In general the following features are provided:
• Change the state of the Unit with respect to transfer of I/O data.
• Clear the mailbox.
• Transmit a Global_Control command over the PROFIBUS network, with specified settings.
The table below lists the two control words and their description of individual bits.
Word n [n = CIO 2000 + (10 x Machine number)]
CIO Bit
Word
n 00 Run
01 I/O Communication inhibit OFF
02 Input Mailbox clear
03~06 Not Used
07 Issue Control command
08 Not Used
09 Clear_Data
10 Unfreeze
11 Freeze
12 Unsync
13 Sync
14, 15 Not Used
260
Name Value
OFF
ON
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
Description
No exchange of I/O data between PLC and remote I/O, and no
processing of mailbox commands will take place. A transition
from ON to OFF will clear or hold the outputs depending on the
value set in DM m+17. Holding remote outputs is only available in
asynchronous data exchange mode.
Unit in normal operation; exchange of I/O data with PLC, and pro-
cessing of mailbox commands are enabled.
I/O communication is enabled.
I/O communication is disabled. A transition from OFF to ON
changes the PROFIBUS DP network state from 'Operate' via
'Clear' to 'Stop'. All remote outputs will therefore be reset.
No specific action.
Each I/O refresh, one unprocessed response (if available) is
removed from the input mailbox.
No control commands are issued.
Each I/O refresh, one control command is issued. The control
command is specified by CIO n.09~13, and the destination is
specified by CIO n+1.
Clear_Data bit will not be set in next Global_Control message.
Set Clear_Data bit in next Global_Control message: Clear output
data at slave device.
Unfreeze will not be set in next Global_Control message.
Set Unfreeze bit in next Global_Control message: Unfreeze input
data at slave device (See Note 1).
Freeze bit will not be set in next Global_Control message.
Set Freeze bit in next Global_Control message: Freeze input data
at slave device (See Note 1).
Unsync bit will not be set in next Global_Control message.
Set Unsync bit in next Global_Control message: Unsync output
data at slave device (See Note 1).
Sync bit will not be set in next Global_Control message.
Set Sync bit in next Global_Control message: Sync output data at
slave device (See Note 1).
Appendix G