Honeywell DCP551 Mark ΙΙ User Manual page 52

RAMP-T system (θ θ setting)
In the RAMP-T system, a segment is set using SP and ramp θ (theta).
SP setting: within the upper and lower SP limiter range
θ setting : 1 to 10000 (SPU/hour, SPU/min, SPU/sec)
SP is a point on the elapsed time axis in the current segment which is an extended
straight line, the ramp set value of the current segment when the SP set value in the pre-
vious segment is the start point.
The end point is the point where this line reaches the SP setpoint of the current segment.
Note that the RAMP-T system cannot be used in the first segment.
SP calculation: SP = θ set value × segment elapsed time + previous segment SP.
SP of previous
segment
RAMP-E system (∆ SP setting)
In the RAMP-E system, segments are set using SP and ∆ SP (digital SP) for each exter-
nal switch input pulse.
SP setting: within the upper and lower SP limiter range
∆ SP setting: 1 to 10000 SPU
The start point is the SP set value in the previous segment.
SP is a value resulting from adding a multiple of the external switch input count to the
SP set value when the SP in the previous segment is the start point.
The segment ends when this SP reaches the SP setting in the current segment and the
current segment SP is more than the previous segment SP or when current segment SP is
less than the previous segment SP.
SP calculation: when current segment SP is more than the previous segment SP, SP =
∆ SP set value × external switch input count + the previous segment SP.
When current segment SP is less than the previous segment SP, SP = – (∆ SP set value ×
exernal switch input count) + the previous segment SP.
SP of previous
segment
External switch input (1)
(Set external switch input using one of setups
(Time units are selected using the
setting
G
Unit time
(Set unit time using setup data
SP setting
SP setting
(2)
Chapter 5. FUNCTIONS
C62
setup data setting.)
SP setting of
current segment
.)
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Current segment SP setting
.
to )
C71 C74
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