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44
CS1/CJ1W-PRM21 PROFIBUS Master DTM
Section 2-3
The Online Operations tab is shown below.
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 FINS messages to the Unit’s
software switches in the CIO Memory Area (refer to the CS1/CJ1W-PRM21
Operation Manual, W409-E2-
@
).
!Caution
When initiating a mode change, it may interfere with attempts from the PLC
Program to write to the same software switches. Care should be taken to
avoid these situations.
Global-Control Messages
Global-Control messages (See section
3-6-3 Transmitting Global-Control
Commands
) can be initiated 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.
Selecting the Groups
Specific groups to send the Global-Control command to can be defined, by
selecting the appropriate checkbox. Selecting the
All Slaves
checkbox can