User manual

PID Loop Operation
(DL450 Only)
Maintenance
and Troubleshooting
8--50
PID Loop Operation (DL450 only)
DL405 User Manual, 4th Edition, Rev. A
The diagram below illustrates how the to use the views to see the current SP, PV and
Output values, along with the other PID addresses. Refer to the Loop Table
Definitions page 8--21 for details of each word in the table. This is also a good data
type reference for each word in the table.
P
I
D
Scale the time axis of the viewing
window by using this i nput box.
The trend can be cleared and
restarted from the left at anytime.
Process Variable and
Setpoint trends are
color coded.
The loop name area
turns red whenever there is an
overflow error.
With both windows positioned in this manner, you are able to see where the PID
values have been set and see the process that it is controlling.