Siemens SINUMERIK 840D sl Function Manual page 385

Table parameters
The position-related compensations for the particular direction as well as additional table
parameters in the form of system variables should be saved in the compensation table:
● $AN_CEC[<t>,<N>] (compensation value for interpolation point <N> of compensation
● $AN_CEC_INPUT_AXIS[<t>] (basic axis)
● $AN_CEC_OUTPUT_AXIS[<t>] (compensation axis)
● $AN_CEC_STEP[<t>] (interpolation point distance)
● $AN_CEC_MIN[<t>] (initial position)
● $AN_CEC_MAX[<t>] (end position)
● $AN_CEC_DIRECTION[<t>] (direction-dependent compensation)
● $AN_CEC_IS_MODULO[<t>] (compensation with modulo function)
Note
For a detailed description of these system variables, see "Compensation of sag and
angularity error: Commissioning (Page 368)".
System of units
See "Compensation of sag and angularity errors: Commissioning (Page 368)".
Monitoring
See "Compensation of sag and angularity errors: Commissioning (Page 368)".
Extended Functions
Function Manual, 09/2009, 6FC5397-1BP20-0BA0
table [<t>])
Note
For the "direction-dependent LEC", the basis and compensation axis are identical.
This system variable is used to set whether the compensation table [<t>] should apply to
both positive and negative traversing directions of the basic axis:
– $AN_CEC_DIRECTION[<t>] = 1:
Table applies only to the positive traversing direction of the base axis
– $AN_CEC_DIRECTION[<t>] = -1:
Table applies only to the negative traversing direction of the base axis
Note
The setting $AN_CEC_DIRECTION[<t>] = 0 (table is effective for both traversing
directions of the basic axis) is not relevant for the "direction-dependent LEC".
K3: Compensation
5.4 Interpolatory compensation
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