User manual

PID Loop Operation
(DL450 Only)
Maintenance
8--31
PID Loop Operation (DL450 only)
DL405 User Manual, 4th Edition, Rev. A
Set Control Output Limits
Another dialog that will be available in the PID setup will be the Output dialog. The
control output address, V+05, (determined by the PID loop table beginning address)
will be in view. Enter the output range limits, Upper Limit and Lower Limit, that will
meet the requirement of the process and which will agree with the data format that
has been selected. For a basic PID operation using a 12 bit output module, set the
Upper Limit to 4095 and leave the Lower Limit set to 0. The Auto transfer to I/O
module is not available for use by the DL450.The Output Data format area is not
available and is grayed out if Common format has been chosen (see page 8--26).
WARNING: If the Upper Limit is set to zero, the output will never get above
zero. In effect, there will be no control output.