Altivar® 58 TRX AC Drives
Type FVC Analog Inputs
© 2000–2003 Schneider Electric All Rights Reserved
72 09/2003
Preset Setpoints for PID Regulator:
2 or 4 preset setpoints require the use of 1 or 2 logic inputs respectively:

ATV58 TYPE FVC ANALOG INPUTS

Analog Torque Limit:
This function is for load compensation, torque or traction correctio n applic ations . It is av ailab le o nly with
an I/O extension card with analog input AI3. The signal appl ied at AI3 oper ates in a l inear f ashion on t he
internal torque limit (parameter TLI in the Drive menu):
If AI3 = 0 V: limit TLI x 0 = 0; If AI3 = 10 V: limit TLI.
Encoder Input Application Function with I/O Extension Card And Encoder Input:
This function provides speed reference summing. The set poi nt from the encoder input is summed with
AI1 (see documentation supplied with the card). Applications include:
• Synchronization of the speed of a number of drive controllers. Parameter PLS on the DRIVE menu
is used to adjust the speed ratio of one motor in relation to that of another.
• Setpoint via encoder.
Encoder Input Application Function with Control Card:
This function provides closed loop flux vector control with sen sor (inputs A, A-, B, B-). This relates to t he
encoder connected to the control card. It is used for fine speed adjus tments , i rrespecti v e of th e state of
the load, and for control optimization (flux vector contro l mod e in close d loo p: Ctr = cl osed l oop, DRIVE
menu).
Consistency between the motor frequency and the speed feedback is monitored in the drive controller
fault management system. If there is no encoder signal (FVC mode ) or if the motor frequency and s peed
feedback are not consistent, the drive controller gives a speed f eed bac k f au lt and loc k s with code SPF.
During operation, if the difference between the motor frequency and the speed feedb ack is grea ter than
5 Hz, the drive controller gives a speed feedback fault and locks with code SPF. If the speed feedback
is greater than 1.2 x maximum frequency, the drive controller gives an overspeed fault with code SOF.
2 Preset Setpoints 4 Preset Setpoints
Assign: LIx to Pr2 Assign: LIx to Pr2, then LIy to Pr4
LIx Reference LIy LIx Reference
0 Analog reference 0 0 Analog reference
1 Process max 0 1 PI2 (adjustable)
1 0 PI3 (adjustable)
1 1 Process max