Lenze 8400 TopLine - Manual (Page 1542)

19 Function library
19.1 Function blocks
1542
Lenze · 8400 TopLine · Reference manual · DMS 6.0 EN · 06/2014 · TD05/TD14
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19.1.100 L_JogCtrlExtension_1
This FB can be connected upstream to the L_NSet ramp function generator/setpoint generator to
implement a switch-off positioning at limit switch.
• Detailed information on this operating mode can be found in the description of the "Switch-off
positioning" TA.
Inputs
Identifier
Data type
Information/possible settings
bInputSel1
bInputSel2
BOOL
Activation of the bSlowDown1/bStop1, bSlowDown2/bStop2 and
bSlowDown3/bStop3 signal pairs according to the Truth table
bRfgIn
BOOL
Ramping down of the setpoint generator in the downstream L_NSet FB according to
the Truth table
bJog1In
bJog2In
BOOL
Selection inputs for setting fixed speeds in the setpoint generator
• If the pre-switch off is inactive (bInputSel1 and bInputSel2 are both set to FALSE),
the two control signals are output one-to-one at the bJog1Out and bJog2Out
outputs.
• To achieve the desired behaviour (starting at high speed, pre-switch off at low
speed), both inputs must be set to TRUE.
• Fixed setpoint 2 must be less than fixed setpoint 3!
Otherwise, the drive will start at a low speed and accelerate after the pre-switch
off.
• If, in addition to the bJog1In and bJog2In inputs, other jog signals are set at the
L_NSet FB, new fixed setpoints are reached, and the drive traverses at speeds that
differ from the selection via bJog1In and bJog2In.
bSlowDown1
bSlowDown2
bSlowDown3
BOOL
Activation of fixed setpoint 2 in the downstream L_NSet FB
• These inputs only fulfil a function if they have been activated via bInputSel1 and
bInputSel2 previously (see Truth table ).
bStop1
bStop2
bStop3
BOOL
Ramping down of the ramp function generator in the downstream L_NSet FB
• These inputs only fulfil a function if they have been activated via bInputSel1 and
bInputSel2 previously (see Truth table ).
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