Pid Group Selection - Honeywell DCP551 Mark ΙΙ User Manual

Chapter 5. FUNCTIONS

PID group selection

Selection of ouput limiter group
5-16
• PID groups can be selected in two ways: by setting a PID segment or through auto-
matic 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.
PID group number 1
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
PID9
can be used.
• In automatic PID group switching, the entire SP scale is divided into seven zones
CP-A1 CP-A6
assigning to
values are automatically selected to calculate control output. The PID group number
for each segment specifies A. Seven PID groups from
used.
Zone 7
CP-A6
Zone 6
CP-A5
Zone 5
CP-A4
Zone 4
CP-A3
Zone 3
CP-A2
Zone 2
CP-A1
Zone 1
Automatic PID group selection
• Output limiter group number can be set for each segment to control the lower limit
(OL) and upper limit (OH) of the control output.
• 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.
2 3 4
to each. The PID constants that are used according to SP
Entire SP range is
divided into seven zones.
oL
and
PID1
PID-A1 PID-A7
to can be
oH
groups 1 to 9 can be used.
to