Eurotherm Drives 590 DRV Digital, Product Manual

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Appendix C Setup Parameters
590 DRV Digital DC Drive Product Manual App. C - 11
C
Figure C.11 - Raise/Lower
These curves illustrate the raise/lower functionality. When EXTERNAL RESET is set TRUE, the raise/lower output
resets to RESET VALUE (default = 0.00%). When RAISE INPUT is TRUE, the output increases at INCREASE
RATE. The output cannot exceed MAX VALUE. The reverse is true when LOWER INPUT is TRUE. The lower
input reduces the output at DECREASE RATE. The output cannot drop below MIN VALUE. Removing the raise or
lower signal before the output reaches its maximum or minimum value prevents the ramp from changing and leaves it
at its last output value. Setting both RAISE INPUT and LOWER INPUT to TRUE at the same time creates a ramp
hold condition.
Figure C.12 - Raise/Lower Operation