NORD Drivesystems BU0500 - Manual (Page 128)

SK 500E – Users Manual for Frequency Inverters
128 BU 0500 GB-1013
P552 [-01]
[-02]
CAN master circle
(CAN master cycle time)
S
0 … 100 ms
{ all 0 }
In this parameter, the cycle time for the CAN/CANopen master mode and the CANopen encoder
is set (see P503/514/515):
[-01] = CAN Master function, cycle time for CAN/CANopen Master functionality
[-02] = CANopen absolute encoder, cycle time of CANopen absolute encoder
According to the Baud rate set, there are different minimum values for the actual cycle time:
Baud rate Minimum value t
Z
Default CAN Master Default CANopen 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
The range of values which can be set is between 0 and 100ms. With the setting 0 “Auto” the
default value (see table) is used. The monitoring function for the CANopen absolute encoder no
longer triggers at 50ms, but rather at 150ms.
Pos : 317 /Anleit ungen/5. / 6. Parametrier ung [BU 0500 / BU 0200]/ Par ameter/ P500-P599/ Paramet er P554 – Mi ni mal er Ei ns atz punkt C hopper @ 0\ mod_1328098628171_388.doc x @ 12100 @ @ 1
P554
Chopper min. threshold
(Minimum chopper threshold)
S
65 ... 101 %
{ 65 }
The switching threshold of the brake chopper can be influenced with this parameter. An optimized
value for numerous applications is set in the factory setting. This parameter can be increased for
applications where pulsating energy is returned (crank drives) to minimise brake resistance power
dissipation.
An increase in this setting leads to a faster overvoltage switch off of the FI.
The setting 101% also switches off the brake chopper at the 65% switching threshold. In addition,
with this setting, monitoring is also active if the FI has not been enabled. I.e. for example if the link
circuit voltage in the FI increases above the threshold in "Standby" status (e.g. due to a mains
fault), the brake chopper is activated. However, in case of an FI fault, the brake chopper is
generally inactive.
Pos : 318 /Anleit ungen/5. / 6. Parametrier ung [BU 0500 / BU 0200]/ Par ameter/ P500-P599/ Paramet er P555 – Leist ungs begrenz ung C hopper @ 0\ mod_1328098671312_388. doc x @ 12123 @ @ 1