Setting The Sp Ramp - Omron EJ1 User Manual

Setting Control Specifications
4-3-5

Setting the SP Ramp

Input range
SP Limiter range
Input range
SP Limiter range
Internal SP
Note The SP is not changed, but the internal SP used for control is lim-
ited by the upper limit of the input range.
SP Setting Example
The internal SP, which is actually used for control, is limited by the input range
and SP Limiter range.
Actual SP setting range
Set Point Limiter
The SP ramp function restricts the width of changes in the set point as a rate
of change. When the SP ramp function is enabled and the change width
exceeds the specified rate of change, this function can restrict the set point
within an area, as shown in the following diagram.
While the SP ramp function is operating, control will be performed not for the
specified set point but rather for the set point restricted by the rate of change
set for the SP ramp function.
SP
SP after change
SP before change
Point of change
The rate of change during SP ramp operation is specified by the SP Ramp
Rise Value, SP Ramp Fall Value, and SP Ramp Time Unit parameters. The
SP ramp function will operate when the SP Ramp Rise Value or SP Ramp Fall
Value is not set to 0 (disabled).
The Ramp SP can be checked by using the Internal SP parameter.
SP
Internal SP
When the input type is changed,
the input range is narrowed.
SP
Input range
SP
Internal SP
SP Ramp
SP Ramp Rise
Value
SP Ramp Time Unit
Time
Section 4-3
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