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• When program settings are protected, it is not possible to copy programs or load
programs from a memory card.
• When PID parameters are protected, constant value control data is also
protected.
• When settings are protected by setup data, variable parameters, event
configurations and PID parameters, they cannot be loaded from a memory card.
● PA05 (program autoload)
0: OFF
1: ON
• When PA05 is set to 1 and a memory card is inserted and press LOAD key,
display panel 1 shows “AUtO ”, display panel 2 shows “LOAd ” and program
file No. 1 is read to program No. 1 in the DCP552. This operation is called
“program autoload”.
• A load operation other than a program autoload that is started using the LOAD
key can only be performed when PA05 is set to 0.
• A program autoload using the external switches can be performed when PA05
is set to 0 or 1.
● PA14 (manipulated variable deviation rate limit)
● PA24 (manipulated variable deviation rate limit)
When output deviation (%) after a PID computation is larger than the set limit
value, the controller limits the output deviation both of the increase or decrease to
the set value.
The following example shows the actual deviation change when the deviation limit
is set to 0.5% and the manipulated variable changes from 20% to 22%. When the
set value is 0.5% per 0.1 sec, the output becomes 22% after 0.4 sec.
● PA16 (ON-OFF control differential)
● PA26 (ON-OFF control differential)
When the PID group number is set to ON-OFF or P is set to 0.0, ON-OFF control
is on and a value for the differential between the two operations is set.
Chapter 7. PARAMETER SETUP