42
Wiring
• Analog Outputs
– Master/Slave (Leader/Follower)
– AO of Master to AI of Slave
– Use 0-Fmax 4-20mA, use P 202 on master to match slope.
– Use P 215 on slave to match intercept
.
Analog Output – Master/Slave
If 2 drives are to work together, at the same frequency, a master/slave
(leader/follower) setup is of benefit. In the diagram above, the Analog Output from the
master is wired to the analog input of the slave. Terminal 42 of the master is wired to
terminal 60 of the slave. Notice that commons must be attached, terminal 39 of the master
to terminal 55 of the slave. Parameter 202 in the master sets the slope of the signal and
parameter 215 in the slave sets the intercept. In later versions parameters 357, terminal 42
minimum scaling, and parameter 358, terminal 42 maximum scaling, are used. These last 2
parameters can only be programmed with the drive stopped which requires more time for
fine tuning. The accuracy of this arrangement has a maximum error of 0.3 Hz any where
from 3 to 60Hz.