User manual

PID Loop Operation
(DL450 Only)
Maintenance
8--71
PID Loop Operation (DL450 only)
DL405 User Manual, 4th Edition, Rev. A
The example program shows how an analog input module, F4--08AD is used to
setup a PID loop. This example assumes that the PID table for loop 1 has a
beginning address of V3000.
All of the analog I/O modules used with the DL450 is setup in a similar manner. Refer
to the DL405 Analog I/O Manual for the setup information for the particular module
that you will be using.
Note that the modules used in the PID loop example program were set up for binary
format. They could have been set up for BCD format. In the later case, the BCD data
would have to be converted to binary format before being stored to the setpoint and
process variable, and the control output would have to be c onverted from binary to
BCD before being stored to the analog output.
By following the steps outlined in this chapter, you should be able to setup workable
PID control loops. The DirectSOFT Programming Software Manual provides more
information for the use of PID View.