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ENGLISH
Configurable I/O Application Functions
Analog input application functions
Input AI1 is always the speed reference.
Assignment of AI2 and AI3
Summing speed reference : The frequency setpoints given by AI2 and AI3 can be summed with AI1.
Speed regulation with tachogenerator : (Assignment on AI3 only with an I/O extension card with analog
input)
An external divider bridge is required to adapt the voltage of the tachogenerator. The maximum voltage must
be between 5 and 9 V. A precise setting is then obtained by setting the dtS parameter available in the adjust
menu.
PTC probe processing : (only with an I/O extension card with analog input). Used for the direct thermal
protection of the motor by connecting the PTC probes in the motor windings to analog input AI3.
PTC probe characteristics :
Total resistance of the probe circuit at 20 °C = 750 W.
PI regulator: Used to regulate a process with a reference and a feedback given by a sensor. In PI mode the
ramps are all linear, even if they are configured differently.
With the PI regulator, it is possible to:
- Adapt the feedback via FbS.
- Correct PI inversion.
- Adjust the proportional and integral gain (RPG and RIG).
- Assign an analog output for the PI reference, PI feedback and PI error.
- Apply a ramp to establish the action of the PI (AC2) on start-up if PSP > 0.
If PSP = 0 the active ramps are ACC/dEC. The dEC ramp is always used when stopping.
The motor speed is limited to between LSP and HSP.
Note: PI regulator mode is active if an AI input is assigned to PI feedback. This AI assignment can only be
made after disabling any functions incompatible with PI (voir page 92).
Auto/Man: This function can only be accessed when the PI function is active, and requires an I/O extension
card with analog input
Via logic input LI, this is used to switch operation to speed regulation if LIx = 0 (manual reference on AI3), and
PI regulation if LIx = 1 (auto).
GP_ATV58_EN.fm Page 97 Mardi, 2. avril 2002 9:24 21