Control Techniques COMMANDER SE, Руководство для продвинутых пользователей

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176
Commander SE Advanced User Guide
Issue Number: 4
12.16 Timed Digital Output
The following set-up can be used to get a delay of up to 33 minutes between the drive being told to run and the digital output
switching.
1.22 = 11 Preset speed 2 to 11
8.21 = 12.01 Digital output (terminal 8) controlled by threshold reached indicator
9.04 = 10.02 Programmable logic source to drive running indicator
9.10 = 14.08 Programmable logic destination to PID enable
12.03 = 14.01 Programmable threshold to PID controller output
12.04 = 90 Programmable threshold level set to 90%
14.03 = 1.22 PID reference source to preset speed 2
14.10 = 0 PID proportional gain to 0
14.11 = 0.05 PID integral gain to 0.05
14.14 = 0 PID low limit to 0
Perform a Save routine: xx.00 = 1000 and press red Stop / Reset button on drive
Operation
When the drive is told to run the PID loop is enabled. An error is created and this error integrates the PID controller output.
When the PID controller output reaches the programmable threshold level, the digital output is switched. When the drive is
told to stop, the PID loop is disable which resets the PID loop error so that when the drive is told to run again, the timing starts
from zero.
This set-up with the PID reference source set to 1 and the integral gain set to
0.05 gives 2000 seconds for 100% in the
threshold level. With the above set-up of 90% in the threshold level, the digital output will switch in a time of 1800 seconds (30
minutes). The threshold can obviously be adjusted to give the required time, if a time of 20 minutes is required:
20 x 60 = 1200 seconds
1200 / 2000 = 0.6 x 100 = 60
Therefore set parameter 12.04 to 60% to get a time of 20 minutes.
12.17 Variable Select Set-up (Selecting two levels of Voltage boost)
The Variable Selector allows a second value to be switched to one parameter on a particular operation of the drive. This can
be used to change the value of a parameter or change the mode of operation of the drive. Preset speed parameters can be
used as the Variable Selector source parameters. The Variable Selector destination parameter can only be programmed to
unprotected parameters. It cannot be programmed to protected, source or destination parameters.
Example 1
Two different levels of boost can be set, a low level during the starting of a motor and a higher level during the stopping of a
motor.
Set-up
5.14 = 2 Voltage mode select to fixed boost mode
9.04 = 1.11 Programmable logic function 1 source parameter to reference enable indicator
9.10 = 12.10 Programmable logic function destination to Variable Selector select
12.08 = 1.21 Variable selector source 1 to preset speed 1
12.09 = 1.22 Variable selector source 2 to preset speed 2
12.11 = 5.15 Variable selector destination to voltage boost
1.21 = 8.0 High level of boost. Set as appropriate
1.22 = 2.0 Low level of boost. Set as appropriate
Perform a Save routine: xx.00 = 1000 and press red Stop / Reset button on the drive
Operation
The programmable logic function monitors parameter 1.11 reference enabled indicator. When the drive is told to run, the
output of the programmable logic switches the variable selector select parameter so that the low level of boost is
programmed to parameter
5.15 . When the drive is told to stop, the output of the programmable logic switches the variable
selector select parameter so that the high level of boost is programmed to parameter 5.15 . The level of boost applied can be
adjusted by changing the values of parameters 1.21 and 1.22 .