Rockwell Automation PLC-5 Fieldbus Solutions for Integrated Architecture User Manual - Manual (Page 140)

Publication 1757-UM006A-EN-P - May 2002
4-54 Configurating the 1757-FIM
Un-initialized State
In the un-initialized state, a fieldbus device has neither a physical
device tag nor a node address assigned by a master configuration
device. The only access to the device is through system management,
which permits identifying the device and configuring the device with
a physical device tag.
Initialized State
In the initialized state, a fieldbus device has a valid physical device
tag, but no node address has been assigned. The device is ready to be
attached to the network at a default system management node
address. Only system management services for assigning a node
address, clearing the physical device tag, and identifying the device
are available.
Operational State
In the operational state, a fieldbus device has both a physical device
tag and an assigned node address. Its application layer protocols are
started to allow applications to communicate across the network.
Additional network management configuration and application
configuration may be needed for the device to become fully
operational.
Fieldbus device matching rules
The FIM initiates the following matching rules depending upon
whether or not the device identification (DEV_ID) is specified, when a
device is loaded from Control Builder.
Table 4.D
If the Device ID is And, the Device State Is The matching rule is
Specified. un-initialized The device ID (DEV_ID) must match. If the desired physical device tag (PD_TAG)
and node address (ADDR) are available, FIM will assign them to the device.
Initialized The device ID (DEV_ID) and physical device tag (PD_TAG) must match. If the
desired address is not in use, FIM will assign it to the device.
Operational The device ID (DEV_ID), physical device tag (PD_TAG), and node address (ADDR)
must match those specified through configuration in Control Builder. Any mismatch
results in an error.
Not specified. Initialized The physical device tag (PD_TAG) must match. If the desired node address (ADDR)
is not in use, FIM will assign it to the device.
Operational The physical device tag (PD_TAG) and node address (ADDR) must match those
specified through Control Builder. Any mismatch results in an error.