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Technical description 8100_A
7.2.10 ENCODERCONSTANT C026
ENCODERADJUSTMENT C027
A constant deviation in the encoder signal (offset) can be adjusted under C026. A
gain error can be corrected under C027.
For configurations with set-value 2 (see 7.1.61. the input via terminals 1 and 2 must
always be checked.
Select the incremental encoder type for the adjustment of X5 using C026. Different
encoder constants can be adapted using C027.
For digital frequency input, make the adjustment as described under 4.4.
7.2.11 AUTOMATIC ADJUSTMENT FOR THE ACTUAL VALUE OF THE
PI-CONTROLLER
Code C029 is used to make an automatic adjustment of the feebdback.
Preparing the adjustment:
Before adjusting the speed controller, observe the setting of the encoder constants.
Analog actual value: If you use an analog tachometer signal, adjust the maximum
tachometer voltage to be expected. You can determine this tachometer voltage
fram the rated tachometer voltage and the maximum motor speed. Set the
corresponding switch combination of S1 on the contral module, as shown in
chapter 4.3.
Digital actual value: If you use an incremental encoder as actual speed detector,
select the incremental encoder input under C025 = -10- and then enter the
encoder constant under C026.
Automatic gain adjustment of actual value
-feedback
Conditions:
Operate the drive in idle running.
The set-value must be at least 10% of the maximum field frequency.
Set the influence of the PI-controller under C074 to zero.
Activation of the automatic adjustment:
Select a configuration with closed-Ioop control under C005.
Enable the controller and wait for the acceleration time to elapse.
Activate the automatic adjustment with C029
= -1-. The inverter confirms the
adjustment by "ok". After this procedure, the gain of the actual value
feedback is set automatically.
Set the influence of the PI-controller under code C074 such that the
maximum possible slip, mostly stall slip, is compensated (e.g. 10%).
lenze
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