Beck, R&J ELECTRIC ACTUATORS FOR INDUSTRIAL PROCESSCONTROL 11-1_9 用户手册

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页码 88
71
Command
travel n
fdbk0pctma n
fdbk100pctma n
fdbkfunc n
posis n
trimfdbk4ma n
trimfdbk20ma n
Description
Sets and/or displays the value that 
represents 100% travel.
Sets and/or displays the mA value of the 
Feedback signal that represents the 0% 
drive position.
Sets and/or displays the mA value of 
the Feedback signal that represents the 
100% drive position.
Sets and/or displays whether or not the 
drive Feedback signal is enabled.
Sets the point of drive travel in relation 
to the drive's current position.  This 
command should only be used when the 
drive is at a known position of travel.
Trims the Feedback signal at 4 mA.  If the 
Feedback signal is not within 1 mA of 4 
mA, an error will be returned.  Note:  The 
Feeback sourcing circuit is factory calibrated 
and normally does not require recalibration.   
Trims the Feedback signal at 20 mA.  If the 
Feedback signal is not within 1 mA of 20 
mA, an error will be returned.  Note:  The 
Feeback sourcing circuit is factory calibrated 
and normally does not require recalibration.   
Argument n and Information
n
 = the desired length of travel in 
degrees.
n
 = the desired Feedback signal for 
0% drive position in mA.  The minimum 
value is 3 mA ("3.00") and the maximum 
value is at least 4 mA less than the 
Feedback signal value for the 100% 
drive position.
n
 = the desired Feeback signal for 100% 
drive position in mA.  The minimum 
value must be at least 4 mA greater 
than the Feedback signal value for the 
0% drive position.  The maximum value 
is 21mA ("21.00"). 
n
 = "0" (no feedback) or "1" (feedback).
n
 = the present drive position as a 
degree of full drive travel to establish 
where the 0% point of travel should be.  
n
 = the present Feedback signal 
from the drive as measured in mA at 
terminals 16 & 17.  The minimum value 
is 3 mA ("3.000") and the maximum 
value is 5 mA ("5.000").
n
 = the present Feedback signal 
from the drive as measured in mA at 
terminals 16 & 17.  The minimum value 
is 19 mA ("19.000") and the maximum 
value is 21 mA ("21.000").
Position and Feedback Signal Commands
Command
torq0k n
Description
Assigns the count value to be 
associated with 0 torque.  This number 
is unique to each drive.
Argument n and Information
n
 = the zero torque value in counts.  
This number is determined during 
manufacture and is noted on a tag 
affixed to the drive body within the 
electronics compartment.
Torque Sensing Commands