Honeywell DCP552 Mark II user manual PID group selection, Selection of ouput limiter group

Chapter 5. FUNCTIONS

■PID group selection

•Separate PID group selections can be set in CH1 and CH2 programs.

•PID groups can be selected in two ways: by setting a PID segment or through automatic PID group switching.

A PID group segment and automatic PID group switching can also be combined. When a PID group number is set to 0, the setting in the previous segment is continued.

SP

Time

PID group number 1 2 3 4

PID group segment setting

•In a PID group segment setting a PID group number is set in each segment and PID parameters are used for calculating the control output. The nine PID groups PID1 to PID9 can be used.

•In automatic PID group switching, the entire SP scale is divided into seven zones assigning CP-A1to CP-A6to each. The PID constants that are used according to SP values are automatically selected to calculate control output. The PID group number for each segment specifies A. Seven PID groups from PID-A1to PID-A7can be used.

SP

CP-A6

CP-A5

CP-A4

CP-A3

CP-A2

CP-A1

Zone 7

Zone 6

Zone 5

Zone 4

Zone 3

Zone 2

Zone 1

Entire SP range is divided into seven zones.

■Selection of ouput limiter group

•Separate output limiter groups can be set in CH1 and CH2 programs.

•Output limiter group number can be set for each segment to control the lower limit (OL) and upper limit (OH) of the control output. oL and oH groups 1 to 9 can be used.

•The output limiter can only be specified by segment; automatic selection cannot be made.

•When the output limiter is set to 0, the setting in the previous segment is continued.

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