Chapter 5. FUNCTIONS

RAMP-T system (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)

 

(Time units are selected using the C62 setup data setting.)

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 previous 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

 

 

 

 

SP setting of

SP of previous

 

 

θ setting

current segment

 

 

Unit time

 

 

segment

 

 

 

 

 

 

 

 

 

 

 

(Set unit time using setup data C62 .)

 

 

 

 

 

 

 

Time

 

 

 

 

 

RAMP-E system (∆ SP setting)

In the RAMP-E system, segments are set using SP and SP (digital SP) for each external 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

Current segment SP setting

SP setting

SP setting

SP of previous segment

Time

External switch input (1)

(2)

(Set external switch input using one of setups C71 to C74. )

5-3

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Honeywell DCP552 Mark II user manual RAMP-T system θ setting, RAMP-E system ∆ SP setting