Omron CJ Series Operation Manual page 198

5 Operation
Global-Control Sync command
CPU Cycle
PROFIBUS Cycle
Slave Output
Refresh Cycle
Note The Global-Control command as set in the CIO words is transferred to the Unit together with
the I/O data, but the Global-Control command is sent over the PROFIBUS network, following
the I/O data. This means that the outputs of the targeted slave device will be updated with the
values sent to the slave prior to the Global-Control command.
 Transmitting Global-Control Commands
In order to transmit a Global-Control command the user has to define the group address and the
command (e.g. Freeze, Sync). These two parameters must be entered in Global-Control command
word, see section 4-2-2 Global-Control Command (*_GlobCtlCmd).
After setting these parameters, the Global-Control command must be transmitted over the PROFI-
BUS network. This is accomplished by setting the Transmit Global-Control command bit
(*_GlobCtlTxCmd) in the Software Switches word (*_SwCmd, see section 4-2-1 Software Switches
(*_SwCmd)). Setting this bit will transmit the message only once. After transmission has been com-
pleted, *_GlobCtlTxCmd in the Software Switches word will be reset again.
 CX-ConfiguratorFDT
CX-ConfiguratorFDT also provides a means to transmit Global-Control commands from the PC,
through the CJ1W-PRM21 Master DTM Diagnosis User Interface - Online Operations tab. This
means uses the same words as described above.
To accomplish a Global-Control command transmission, perform the following sequence.
1
Make sure the CJ1W-PRM21 Master DTM is online with the PROFIBUS Master Unit.
2
Open the CJ1W-PRM21 Master DTM Diagnosis User Interface.
3
Select the Online Operations tab.
4
Select the commands to be transmitted (e.g. Freeze, Sync) using the checkboxes.
5-46
Instruction Instruction
Execution Execution
Sync Sync
transmitted transmitted
Sync command causes Sync command causes
immediate refresh of immediate refresh of
slave outputs, and slave outputs with last
freezes slave output received PROFIBUS
refresh process. output data.
CJ-series PROFIBUS Master Unit Operation Manual for NJ-series CPU Unit (W509)
Global-Control Unsync command
Instruction Instruction
Execution Execution
Unsync
transmitted
Unsync command
cancels Sync command
and causes immediate
refresh of slave outputs
and with last received
PROFIBUS output data.