Honeywell DCP551 Mark ΙΙ User Manual page 102

Chapter 6. OPERATION
HANDLING PRECAUTIONS
6-14
• Auto-tuning does not operate normally when the equipment to be controlled is
not connected.
• The time required for auto-tuning depends on the equipment controlled.
• When auto-tuning is executed, control is terminated , lower and higher limit
outputs are repeated several times and PV fluctuates. When equipment fail-
ure may be caused by PID fluctuations, set the PID value manually.
If just PID value can not be got in case of control object, sets PID value with
manual.
• A variable parameter
ing valid. A change in the
ignored. The new value is valid in the next auto-tuning operation.
PA08
setting makes values set at the start of auto-tun-
PA08
setting made during auto-tuning execution is