Rockwell Automation Publication PFLEX-RM003E-EN-E - January 2011 199
Detailed Drive Operation Chapter 1
MOP Configuration
• Parameter 1086 [MOP Control] is use to configure and control the motor
operated potentiometer. The bits are as follows:
– Bit 0 “Increase” - if set, increments the MOP level (output) from
parameter 1087 [MOP Rate] to parameter 1088 [MOP High Limit].
– Bit 1 “Decrease” - if set, decrements the MOP level (output) from
parameter 1087 [MOP Rate] to parameter 1088 [MOP Low Limit].
– Bit 2 “Reset” - if set, resets the MOP level (output) to zero and bits 0
“Increment” and 1 “Decrement” are inhibited.
– Bit 3 “Reset @ Stop” - if set, resets the MOP level (output) to zero when
stop is set.
– Bit 4 “Reset @ PwrLs” - if set, resets the MOP level (output) to zero
when power is lost.
Note: If either bit 3 or 4 is not set, the MOP level (output) will be saved
until bit 2 “Reset” is set.
• Parameter 1087 [MOP Rate] sets the rate of change (increment or
decrement) for the MOP. The setting 0.1/sec will equate to an increment
or decrement of 0.1 for every second active. If this value is used for the
speed reference, it equates to 10% of base speed every second for a total of
10 seconds until base speed is reached.
• Parameter 1088 [MOP High Limit] sets the upper limit for the MOP
output. The MOP cannot be incremented above this level.
• Parameter 1089 [MOP Low Limit] sets the lower limit for the MOP
output. The MOP cannot be decremented below this level.
• Parameter 1090 [MOP Level Real] or 1092 [MOP Level DInt] can be
linked to the parameter that you wish to control via the MOP function.
For example, link parameter 10 [Speed Ref 1] to parameter 1090 [MOP
Level Real] to control the value of speed reference 1.
• Parameter 1091 [MOP Scale DInt] set this value for scaling of the DInt
MOP output. The MOP is calculated and controlled as a Real value MOP.
Use this scale to adjust for an integer value. Use this parameter to scale the
conversion from Par 1090 to Par 1092.
• Parameter 1092 [MOP Level DInt] is the actual output value of the MOP
as a DInt number. This value is scaled by parameter 1091 [MOP Scale
DInt].
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