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Rockwell Automation Publication 1788-UM057B-EN-P - September 2014 29
Set Up in the Studio 5000 Logix Designer Application Chapter 2
Max Scan Address
When the linking device is operating, a background scan constantly probes each
unused node number to see if any new field devices were connected. The
background scan runs to the max scan address, then restarts at one.
Slave Retry Limit
The slave retry limit sets the number of times the H1 Master re-requests data
before dropping the connection. The default setting is 5.
MacroCycle (ms)
The amount of time between data compels (process variables). Too low a number
can cause poor performance when downloading and going online with a field
device.
Auto Reset Trip
Selects the option to reset H1 bus trips due to over-current.
• If the checkbox is selected, the trip automatically resets. The linking device
resets the trip each 5 seconds. If the trip is still persistent, the bus will trip
again.
• If the checkbox is not selected, reset the bus via the reset button on the
master status page.
Fail Status in Prog/Fault Mode
The fail status is used when field devices use output blocks (AO or DO) that are
receiving data from the Logix controller via the linking device. When the linking
device loses connection to the Logix controller, or the Logix controller goes into
Program mode or Fault mode, you can choose one of two operations:
• If the checkbox is selected, the linking device detects that there is a comms
fault on the Ethernet network and forces all output PV status to
Bad:NoComms. If the field device is configured correctly, the field device
goes to fail-safe value.
• If the checkbox is not selected, the linking device continues to send the last
received data.
Upload Config
Uploads the configuration store on the attached linking device.
IMPORTANT
Do not modify the default setting. A limit above 5 can slow down
communication.
TIP
When Logix is in Prog/Fault mode, you can still go into the tags and
change values as the linking device is still connected.