Rockwell Automation 900-TC32 Digital Temperature Controllers, Series B - Manual (Page 270)

Publication 900-UM007D-EN-E - January 2011
5-42 Parameter Functions & Definitions
Related Parameters
• Input Type (page 5-50), Scaling Upper-Limit, Scaling Lower-Limit (page
5-52), Decimal Point, ST (page 5-56) (Initial Setting function group)
• SP Ramp Time Units (Advanced Setting function group, page 5-71)
MV (Manipulated Variable) Upper-Limit,
MV (Manipulated Variable) Lower-Limit
Conditions of Use: The control method must be 2-PID control, and the ST
parameter must be set to OFF.
Function: The MV Upper-Limit and MV Lower-Limit parameters allow you
to configure the Upper- and Lower-Limits allowed for the manipulated
variable. If the current manipulated variable calculated by the Bulletin 900
Controller exceeds your configured MV upper- or Lower-Limit value, then the
current value becomes the upper or Lower-Limit MV value. Your configured
MV limits will NOT be exceeded by the controller.
MV Upper-Limit
The configurable ranges allowed during the standard control and heating and
cooling control modes are different.
The manipulated variable at the cooling Control Output side during heating
and cooling control is expressed as a positive value (refer to Table 5.AW).
Table 5.AV
Parameter Configurable Range Units Default Value
SP Ramp Value OFF, 1…9999 EU OFF
Table 5.AW
Control Mode Configurable Range Units Default Value
Standard MV Lower-Limit
+0.1…105.0 % 105.0
Heating and cooling 0.0…105.0 % 105.0
ol-h
ol-l