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1
shaft synchronization application
(Software APFIFF11 V1.13 or higher)
Select the Shaft Synchronization Application in menu M6 on page
S6.2.
1. INTRODUCTION
The Shaft Synchronization Application provides Position synchronization control of a follower drive
to a master position signal, with the ability to control the synchronization ratio online via fieldbus,
parameter or by digital trim +/- input. The drive requires feedback from an encoder or resolver. The
master position signal comes from an incremental encoder or a single phase pulse generator and is
read using the OPT-A7 board if the follower drive employs an induction motor or the OPT-BC board
if the motor is of a PM synchronous type.
The application offers general purpose functionality support also for independent speed or torque
control when the shaft synchronization mode is not enabled.
Specific application features:
• Synchronization commands: enable sync. mode, engage/release, freeze and reference
speed are all controlled from digital inputs or fieldbus control register
• Ratio range -4 to +4 in steps of 1/65536 can be controlled by parameter or fieldbus in RUN
mode
• Programmable trim inputs +/- and trim ratio change parameter for temporary ratio change
from digital inputs
• Programmable ratio change ramp
• Programmable engage/ release ramp
• Digital or relay outputs for “Ratio change” and “Synchronization engaged”
• Supported fieldbuses: Profibus, CanOpen, Modbus, Modbus TCP
• Synchronization regulator cycle time is 5 ms
• Phasing from standstill or during running (offset of follower position)
• Mechanical brake control
Other general purpose features:
• Induction motor identification
• PM motor rotor angle identification
• All digital and analogue inputs and outputs are freely programmable
• Analogue input signal range selection, with automatic adjustment
• Supervision of two frequency thresholds
• Supervision of torque limit
• Supervision of reference limit
• Second ramp and S-shape ramp programming
• Programmable start/stop and reverse logic
• DC-braking at start and stop
• Programmable U/f curve and switching frequency
• Fully programmable motor thermal and stall protection
• Input and output phase supervision
• Joystick with programmable hysteresis
NOTE: The Shaft Synchronization application creates a rigid electrical coupling between master and
follower(s) axis. The application is not suitable if there is a rigid mechanical coupling
between master and follower(s).
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