Honeywell Series A User Manual page 278

7. Fieldbus Device Commissioning
7.1. Getting Started
For This Function. . .
Link Settings
Link Schedule
Virtual Communication
Relationships (VCRs)
278 Experion PKS Series A Fieldbus Interface Module User's Guide
Consider This . . .
These parameters can effect whether or not a device can
communicate with other devices on the link, or whether it
communicates efficiently and can recover properly from errors.
They should never be changed, especially by another host
device.
If the Experion system notices that these parameters have been
changed after a device has been off the network, the FIM takes
the following action:
c) Changes the parameters back.
d) De-commission the device (assuming other parameters
have been changed also).
e) Change a Link-Master-capable device to a Basic device.
To recover, the (now uncommissioned) device must be
changed back to a Link-Master device, if desired, and re-loaded
from the Project or Monitoring tab in Control Builder.
The Link Schedule controls the publication schedule, if no FIM
is available on the link. If the device was moved from another
link or to another host and was loaded with a different schedule,
the link schedule is not the current schedule version number for
this link. In this case, the FIM will take the following action.
f) De-commission the device.
g) Change a Link Master capable device to a Basic device.
To recover, the (now uncommissioned) device must be
changed back to a Link-Master device, if desired, and re-loaded
from the Project or Monitoring tab in Control Builder.
The Virtual Communication Relationships (VCRs) are
communication connections that are established for a given link.
They should not be re-configured on another link or by another
Host. Otherwise, they will very likely not be configured correctly
and could interfere with communications when the device is
restored to the desired link. When the FIM first encounters a
new uncommissioned device, it will clear its VCRs.
Honeywell
R400
July 2010