Drive Control
DC RS alpha
Issue 09/99
30
1.3 Internal PLC
The PLC integrated in the drive controller DC RS alpha contains a standard
programming.
The following table shows the allocation of the PLC ports to the inputs and
outputs of the DC RS
alpha hardware in case of standard programming.
DC RS alpha
Internal PLC
HE1 Start counter-clockwise rotation
HE2 Start clockwise rotation
HE3 Release
HE4 Quick stop
HE5 Switching for potentiometer P2:
Setting the ramp for starting/stopping or
setting the IxR compensation
1.4 Supply voltage
The drive controller can be driven with a supply voltage of 10 to 30 VDC.
However, the supply voltage must be set on the circuit board with a jumper (refer
to section 3.1).
• Jumper in position 2-3: Supply voltage 10 VDC up to 18 VDC
• Jumper in position 1-2: Supply voltage 18 VDC up to 30 VDC
1.5 Potentiometers, display LED
The PLC programming allows to assign the potentiometers P1 to P3 to the motor
parameters in any way. In case of standard programming the following
assignment is applied:
P1 = Speed of rotation
P2 = Ramp slope for starting/stopping and IxR compensation (switchable)
P3 = Limit of motor current
The LED is used for operation display:
LED flashes approx. once per second: Normal operation
LED flashes approx. four times per second: EEPROM failure (checksum)
While the drive controller is sending data to the connected PC programming
software BeCon the LED flashes in the rhythm of the sent data.
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