3.4 Cascade control of reflow ovens
3-17
Typical Control
Examples
9. Press the key and then press the M repeatedly to select "at: AT
Execute / Cancel" of the primary loop (ch 1). Press the U key to change
the set value to "0" and run primary AT. During AT the automatically
selected PID Set No. is displayed and display 1 (at) blinks.
When AT finishes, display 2 changes to "off" and display 1 (at) stops
blinking.
This completes PID adjustment for the primary and secondary loops.
Operation when a primary loop input error occurs
When an input error occurs in the primary loop, MV at error is output
for the primary (ch 1) MV, and the secondary loop continues control
using a remote SP equivalent to the MV at error of the primary loop.
For this reason, be sure to set MV at error for the primary loop.
CH
at
1
off
l.adj
SPDTh
RSP
AT Execute / Cancel
0
U
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