Rockwell Automation T80017 Application Note Regent to Trusted Migration - Manual (Page 9)

Trusted TM
AN-T80017 Regent to Trusted Migration
Issue 2 June 08 AN-T80017 9
4.6. FLOAT function blocks
These are very similar to Trusted structured text programs, and were designed to handle floating point
arithmetic. Winterpret ladder programs can only handle integer arithmetic. These may be replicated as
structured text in Trusted.
4.7. MODBUS MASTER function blocks
These are replaced by the Modbus Master editor in the Trusted system configurator, for the
appropriate communications interface. The basic structure of declared slaves and assigned messages
is the same.
4.8. SOE function blocks
These created event lists from a list of shared control relays assigned for SOE collection. These
function blocks are replaced with SOE boards in the I/O connection table. Similarly, Process Historian
function blocks are replaced with PH boards in the I/O connection table.
4.9. PID function blocks
PID blocks are replaced with ipid function blocks inside FBD programs, from the T8019 Process
Control package. Refer to PD-T8019 for details on their operation.
4.10. Program Load
Regent allowed the I/O table and shared variables to be loaded as a foundation, with programs of
function blocks loaded and controlled individually on top. Trusted only has one application download
and relies on online updates for modifications.
The Trusted application will only run when all I/O module definitions match the system as discovered.
On failure, the message ‘cannot open board’ will be shown for each failed board, giving the table row
on which the definition is placed.
4.11. Diagnostics
A Trusted-Regent hybrid is essentially a Trusted system with unusual I/O modules. The fault history is
replaced by entries in the processor event log (ls d). The fault table is replaced by diagnostic command
‘rio’. This provides tables of the configured and actual modules. It also provides tables of transient and
permanent faults in text form, replacing the yellow and red icons in the Winterpret fault table. To see
the command syntax, type ‘rio’.
The clock in Regent may be set in a pop-up window; the nearest equivalent in Trusted are the
diagnostic commands ‘fps q’ to display the clock and ‘fps d …’ to set the clock.
4.12. System variables
Regent has fixed tables of system diagnostic data which do not exist in Trusted. Equivalent Trusted
information can usually be found in the diagnostic boards on each module definition in the I/O
connection table.