PG DRIVES TECHNOLOGY S-DRIVE - PROGRAMMING
SK76745/10
If the motor current is greater than 40A for 30s, then the S-Drive’s maximum output current will be
reduced to 50% of 60A = 30A. The maximum possible output current will then be 30A for the next
150s. After that time, full current capability will be restored.
8.4 Current Foldback Temp.
The parameter Current Foldback Temp. sets the temperature at which the S-Drive starts to reduce its maximum current capability.
The temperature is measured at the S-Drive’s heatsink.
Current Foldback Temp. Adjustable between 0°C and 80 °C in steps of 1°C
The graph below shows the operation of this function.
If the S-Drive’s internal temperature reaches the value set by Current Foldback Temp., then the maximum current output will be
reduced from the value set by Current Limit Max. The reduction will be a linear reduction to a value set by Current Limit Min. at a
fixed internal temperature of 80°C.
The table below shows the maximum permissible settings for Current Foldback Temp. and Current Limit Min.
8.5 Motor Compensation
This matches the controller to different motor types in order to achieve optimal performance and control, especially regarding
anti-rollback and braking on gradients. PGDT recommend that you set this value to 60% of the resistance of the motor armature
and all connectors and cables to it.
Motor manufacturers should be able to supply figures for armature resistance, and typical cable and connectors would be
about 40mOhms.
You can set this value between 0 and 1000 mOhms in steps of 5 mOhms.
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