32
Manual – MOVIDRIVE® MDX60B/61B Communication and Fieldbus Unit Profile
4
Other unit functions via RS485 interfaces
Serial Interfaces of MOVIDRIVE® B
Speed
synchronization
The actual speed of the master is transferred to the slave. Set the torque ratio for the
slave inverter using
P751 Scaling slave setpoint
. Leave
P324 Slip compensation 1/P334
Slip compensation 2
of the slave at the value as the startup setting.
Example:
Load sharing
This function lets two inverters control the same load. The rotating field frequency of the
master is transferred to the slave. It is assumed in this case that the shafts of the motors
corresponding to the master and the slave are rigidly connected together. You are
recommended to use the same motors with the same gear ratios, otherwise different
delays may result during starting/stopping due to the pre-magnetizing time and the
brake release/application time.
P751 Scaling slave setpoint
must be set to the value "1".
Example:
Parameter
Setting on the master
Setting on the slave
P100 Setpoint source
e.g. UNIPOL./FIXED SETP
MASTER SBus
P101 Control signal source
e.g. TERMINALS
Not in effect
P700 Operating mode 1
VFC n-CONTROL
VFC 1
P750 Slave setpoint
SPEED (SBus)
MASTER-SLAVE OFF
P751 Scaling slave setpoint
Not in effect
1 (then 1 : 1)
P810 RS485 Address
Set different values
P811 RS485 group address
Not in effect
P881 Address SBus 1
Set different values
P882 SBus group address
Set the same value (0 - 63)
P884 SBus baud rate
Set the same value (125, 250, 500 or 1000 kBaud)
TIP
P324 Slip compensation 1 /P334 Slip compensation 2
of the slave must be set to 0.
Better behavior can be accomplished by setting the slave as follows:
•
P138 Ramp limitation VFC
: OFF
•
P115 Filter setpoint
: 0 s
• Ramps P130 / P131 /P132 / P133: 0 s
•
P301 Minimum speed 1 / P311 Minimum speed 2
: 0 min
-1
Parameter
Setting on the master
Setting on the slave
P100 Setpoint source
e.g. BIPOL./FIXED SETP
MASTER RS485
P101 Control signal source
e.g. TERMINALS
Not in effect
P324 Slip compensation 1
Do not change
0
P700 Operating mode 1
VFC 1
VFC 1
P750 Slave setpoint
LOAD SHAR. (RS485)
MASTER-SLAVE OFF
P751 Scaling slave setpoint
Not in effect
1 (then 1 : 1)
P810 RS485 Address
Set different values
P811 RS485 group address
Set the same value (101 - 199)
P881 Address SBus 1
Set different values
P882 SBus group address
Not in effect
P884 SBus baud rate
Not in effect
Summary of Contents for MOVIDRIVE MDX60B
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