Flowserve 400MD Logix - Manual (Page 68)

TIME_LAST_RCVD
PRIMARY_AP_TIME_
PUBLISHER
The application clock time contained in the last clock message.
The node address of the primary time publisher for the local link (bus).
265
266
Dynamic
Set by SM (mgr.) during address assignment
TIME_PUBLISHER_ADDR The node address of the device which sent the last clock message. 267 Dynamic
Unused 268
MACROCYCLE_DURATION The length of the macro cycle in 1/32 of a millisecond ticks. 269 Set by SM (mgr.) during address assignment
Device ID, Tag Name and Device Address
Each fieldbus device on the network is uniquely identified by:
• Device ID that is set by the manufacturer to identify the device.
• Device Name (Tag) set by the user to identify operation
• Device Address - a unique numerical address on the fieldbus segment. Address may be set automatically by system management.
Address Assignment Objects
Table 8.24 is a description of the address assignment objects with their object directory index and default values.
Table 8.24 SM Address Assignment Objects
Object Description OD index Default Value
DEV_ID The device ID set by the manufacturer. 270
464C530201-VAL-LX1
400-0nnnnnnnn
PD_TAG The physical device tag to be set using SET_PD_TAG service. 271 All Spaces
OPERATIONAL_ Controls the state of SM of the device upon power-up.
POWERUP
272 TRUE (SM goes opera tional after power up)
Virtual Field Device (VFD) List Objects Two objects identify the VFDs in the device:
Table 8.25 Virtual Field Device (VFD) List Objects
OD Index VFD_REF VFD_TAG
273 1 ‘MIB’
274 2 ‘Resource’
Function Block Scheduling The SMIB contains a schedule, called the function block schedule, that indicates when that device’s function
blocks are to be executed.
System Management schedules the start of each function block relative to the macro cycle of the device. The macro cycle represents one
complete cycle of the function block schedule in a device. The macro cycles of all devices on the link are synchronized so that function block
executions and their corresponding data transfers are synchronized in time.
Using the configurator software, the device’s function block schedule can be pre-configured.
Function Block Scheduling Objects
Four scheduling objects are defined in the Logix 3400MD digital positioner. Table 8.25 lists the func tion block scheduling objects with their
object directory index and default values.
Table 8.25 Function Block Scheduling Objects
Logix 3400MD Digital Positioner LGENIM3405-02 11/13
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