Rockwell Automation 900-TC32 Digital Temperature Controllers, Series B - Manual (Page 216)

Publication 900-UM007D-EN-E - January 2011
4-80 Parameter Adjustments & Application Considerations
Setting the Rate of MV Variation
The MV Change Rate Limit parameter sets the maximum allowable rate of
change in the MV in units of percent per second. If the change in the MV
exceeds this setting, the MV will be changed by the MV change rate limit until
the calculated value is reached. This function is disabled when the setting is
0.0.
The MV Change Rate Limit parameter does not function in the following
situations:
• In manual mode
• During ST execution (Cannot be configured when ST is ON.)
• During AT execution
• During ON/OFF control
• While stopped (during MV at Stop output)
• During MV at PV Error output
Operating Procedure
This procedure sets the MV Change Rate Limit to parameter 5.0%/s. The
related parameters are as follows:
PID·ON/OFF = PID
ST = OFF
Figure 4.179 — Operation function group
1. Press the
O Key for at least three seconds to move from the Operation
function group to the Initial Setting function group.
Figure 4.180
Table 4.AK
Parameter Name Configuration Range Units Default
MV Change Rate Limit 0.0...100 %/s 0.0
C 25
100
PV/SP
in-t
0
Input Type