102 - Advanced Functions
DeviceMaster PNIO | UP User Guide
: 2000639 Rev. A
Advanced Functions
If the second connection could not be established, here are some troubleshooting
tips:
•
Make sure the same DeviceMaster module is added in both projects. The
DeviceMaster module must be assigned with the same IP address and same
device name.
•
Both IO controllers should be on the same subnet with different IP addresses.
•
Any serial port or Ethernet device can only be controlled by one IO controller.
The easiest way is to leave some slots open in one project, then use these
unused slots in another project.
•
In the second project, the access option of head module must be set to
—
. Like
serial/Ethernet modules, the head module also can be controlled only by one
IO controller.
•
Some IO controllers, such as the S7-1200 CPU, do not support shared device.
They can still be used as the main PLC, but cannot be used as the secondary
PLC. Only IO controllers that support shaved device, such as S7-1500 CPU,
can be configured as the secondary PLC.
•
Please refer to the
STEP 7 Professional V13 SP1 System Manual
(chapter
titled:
Configuring Shared Devices
) for more information regarding shared
device functionality.