Fuji Electric FRENIC MEGA G2 Series - 3 ] Master-Follower Operation

5.3 Description of Function Codes 5.3.9 d codes (Applied functions 2)
5-309
FUNCTION CODES
Chap 5
FUNCTION
CODES
F Codes
E Codes
C Codes
P Codes
H Codes
A Codes
b Codes
r Codes
J Codes
d Codes
U Codes
y Codes
K Codes
[ 3 ] Master-follower operation
d71 to d78
Master-follower operation
With master-follower operation, the speed and position of the master shaft being run by another inverter is detected
with an encoder (PG), and the speed and position of the follower shaft being run by this inverter are synchronized.
Depending on the synchronization method, there are 4 methods: “Speed synchronization (tuning) operation” and
“Immediate synchronization mode at the start (without Z-phase compensation)” that do not require the Z-phase,
and “Start after synchronization” and “Simultaneous start synchronization operation (with Z-phase)” with Z-phase
compensation.
PG option card OPC-PG or OPC-PG22 is required to allow a 2-system encoder to be connected.
Input the master side motor PG signals are input to terminal [XA], [XB], and [XZ], and the follower side motor PG
signals to terminal [YA], [YB], and [YZ].
However, if “Without Z-phase compensation” is selected, it is not a problem if terminal [XZ] and [YZ] are not
connected.
Master-follower operation
method
Synchronization
system
Z-phase
signal
connection
Master side = follower side (Required/Not required)
Number
of motor
poles
Motor
reduction
ratio
Encoder
pulse
count
Encoder
reduction
ratio
Speed synchronization
(tuning)
Speed
synchronization
Not required
Not required
Master-follower (with Z-
phase compensation)
Position
synchronization*1
Required
Not required*3
Required*2
Immediate synchronization
mode at the start (without Z-
phase compensation)
Not required
Not required*3
Immediate synchronization
mode at the start (with Z-
phase compensation)
Required
Required*2
*1 When performing position master-follower operation, control is performed so that the machine speed/position is
synchronized with the encoder detected speed/position, and therefore the relationship between the machine
speed/position and encoder detected speed/position should be master side = follower side. If this relationship is
not observed, it will not be possible to perform position master-follower operation.
*2 When performing position master-follower operation, configure so that master side = follower side for the encoder
pulse count and encoder reduction ratio.
*3 It is recommended that master side = follower side for the number of motor poles and motor reduction ratio, but
if the configuration is such that the master side machine speed/position and follower side machine speed/position
relationship is equal, the master side does not have to be equal to the follower side. By applying a scaling factor
to pulse detection from the master side encoder, it is also possible to synchronously control the machine
speed/position ratio for the master side and follower side.
 Application-defined control (d41)
d41 data
Function
0
Speed synchronization (tuning) operation
2
Immediate synchronization mode at the start, without Z phase
3
Synchronized operation (Start after synchronization mode (with Z-phase))
4
Immediate synchronization mode at the start, with Z phase