Omron CJ Series Operation Manual page 111

 PROFIBUS Communication Group
These buttons can be used to force the Unit to change its operating mode. The four operational
modes are:
• OFFLINE mode.
• STOP mode.
• CLEAR mode.
• OPERATE mode.
The mode changes are implemented through messages to the Unit's software switches in the CPU
Memory Area (see 4-2-1 Software Switches (*_SwCmd)).
Precautions for Correct Use Precautions for Correct Use
When initiating a mode change, it may interfere with attempts from the CPU Program to write to
the same software switches. Care should be taken to avoid these situations.
 Global-Control Commands
Global-Control commands (See section 5-6-3 Transmitting Global-Control Commands) can be initi-
ated by the user from the Online Operations tab. The user can select the Global-Control commands:
• Freeze.
• Unfreeze.
• Sync.
• UnSync.
All commands can be transmitted independent from each other, i.e. all can be send at the same
time. However, their effects are not independent, as for example sending Freeze and Unfreeze at
the same time results in an Unfreeze command at the slaves.
CJ-series PROFIBUS Master Unit Operation Manual for NJ-series CPU Unit (W509)
3 Configuration Software
3
3-33