Yamatake SDC35, User Manual

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SP ramp-up/ramp-down
The SP ramp-up and ramp-down can be set.
• The SP ramp-up/ramp-down setting is valid when [C31: SP ramp type] is set at
“0: Standard”.
• When an initial value of “0.0U” is set, the SP ramp function does not function.
Therefore, when the ramp-up setting is set to “0.1U” or more and the ramp-down
is set to “0.0U”, the SP ramp function is enabled only during the ramp-up and
disabled during the ramp-down. Additionally, the reverse operation can also be
set so that the SP ramp function is enabled only during the ramp-down and
disabled during the ramp-up.
• "0.1U" shows that the decimal point position of the PV is shifted one digit
rightward.
Example: When the thermocouple input is in a range of -200 to +1200˚C, "0.1U"
is "0.1˚C ".
Example: When the DC voltage input is in a range of 0.0 to 100.0, "0.1U" is
"0.01".
• The ramp is started assuming that the current PV value is used as start point
when the SP ramp-up or ramp-down is possible under the following conditions.
The power is turned ON.
READY+AUTO status is changed to RUN+AUTO status.
RUN+MANUAL status is changed to RUN+AUTO status.
The AT function is completed (both normal end and forced stop).
Example: (1) When READY is changed to RUN with SP=100˚C, PV =25˚C,
SPU=0.0, and SPd=1.0, the PV is not started.
(2) When READY is changed to RUN with SP=50˚C, PV=100˚C,
SPU=0.0, and SPd=1.0, the PV is started.
• The SP ramp does not function for remote SP.
5-38
Chapter 5. DETAILED DESCRIPTION OF EACH FUNCTION
Item (Bank) Display Contents Initial value User level
SP ramp-up
(Parameter bank) 0.0U: No ramp
0.1 to 999.9U
(The unit of the ramp time is selected using
the SP ramp unit.)
0.0U High function
0.0U
SP ramp-down
(Parameter bank)