5.6 Additional Parameters
BU 0200 GB
Subject to technical alterations
131
Parameter
Setting value / Description / Note
Device
Supervisor
Parameter
set
P552
…
-01
…
-02
System bus master cycle time
S
0 / 0.1 … 100.0 ms
[ 0 ]
In this parameter, the cycle time for the system bus master mode and the CAN open encoder is
set (see P503/514/515):
[01] =
Cycle time for system bus master functions
[01] =
Cycle time for system absolute value encoder
With the setting
0 = “Auto”
the default value (see table) is used.
According to the Baud rate set, there are different minimum values for the actual cycle time:
Baud rate
Minimum value t
Z
Default System Bus Master
Default System Bus Abs.
10kBaud 10ms
50ms
20ms
20kBaud 10ms
25ms
20ms
50kBaud 5ms
10ms
10ms
100kBaud 2ms
5ms
5ms
125kBaud 2ms
5ms
5ms
250kBaud 1ms
5ms
2ms
500kBaud 1ms
5ms
2ms
1000kBaud: 1ms
5ms
2ms
P555
P Chopper Limit
S
5 ... 100 %
[ 100 ]
A power limit for the brake resistor can be programmed with this parameter. The switch-on time
(modulation level) for the brake chopper can only increase to the maximum specified limit.
The result would be an overvoltage switch-off of the FI.
The correct percentage value is calculated as follows:
2
max
max
*
[%]
U
P
R
k
BW
R = Resistance of the brake resistor
P
maxBW
= Short-term peak power of the brake resistor
U
max
= Chopper switching threshold of the FI
1~
115/230V
440V=
3~
230V~
500V=
3~
400V~
1000V=
NOTE:
With the use of the internal brake resistor SK BR14-… a suitable limit must be set.
However, the activation of the limit via the DIP switch (Section 4.1), DIP8 = “On” is
recommended.
P556 Brake
resistor
S
20 ... 400
[ 120 ]
Value of the brake resistance for the calculation of the maximum brake power to protect the
resistor.
Once the maximum continuous output (P557) including overload (200% for 60s) is reached, an
I
2
t limit error (E003.1) is triggered. Further details in P737.
P557
Braking resistor power
S
0.00 ... 20.00 kW
[ 0.00 ]
Continuous power (nominal power) of the resistor, to display the actual utilisation in P737. For a
correctly calculated value, the correct value must be entered into P556 and P557.
0.00 =
Monitoring disabled
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