Rockwell Automation 20B PowerFlex 70, PowerFlex 700 Reference Manual User Manual
Page 114
MOP
114
Rockwell Automation Publication PFLEX-RM001H-EN-P - June 2013
Direction Mask
This “masks out” the reverse function from all adapters except Adapter 2, making
the local HIM (Adapter 1) REV button inoperable. Also see
MOP
The Motor Operated Pot (MOP) function is one of the sources for the frequency
reference. The MOP function uses digital inputs to increment or decrement the
Speed reference at a programmed rate.
The MOP has three components:
•
[MOP Rate] parameter
•
[Save MOP Ref ] parameter
•
[MOP Frequency] parameter
MOP increment input
MOP decrement input
The MOP reference rate is defined in [MOP rate]. The MOP function is defined
graphically below
MOP rate is defined in Hz/sec. The MOP reference will increase/decrease
linearly at that rate as long as the MOP inc or dec is asserted via TB or DPI port
(the MOP inputs are treated as level sensitive).
Both the MOP inc and dec will use the same rate (i.e. they can not be separately
configured). The MOP rate is the rate of change of the MOP reference. The
selected active MOP reference still feeds the ramp function to arrive at the
present commanded speed/frequency (eg. is still based on the accel/decel rates).
Asserting both MOP inc and dec inputs simultaneously will result in no change
to the MOP reference.
[Save MOP Ref ] is a packed boolean parameter with two bits used as follows:
Bit 0
0 = Don’t save MOP reference on power-down (default)
1 = Save MOP reference on power-down
0
0
0
0
0
1
0
0
Adapter #
X
6
5
4
3
2
1
0
MOP dec
MOP inc
MOP reference