FanAm MD60 AC Drive - Manual (Page 118)

F-2 MD60 AC Drive User Manaul
Wiring terminations on the master controller will vary depending on
the master controller used and “TxRxD+” and “TxRxD-” are shown
for illustration purposes only. Refer to the master controller’s user
manual for network terminations. Note that there is no standard for
the “+” and “-” wires, and consequently Modbus device
manufacturers interpret them differently. If you have problems with
initially establishing communications, try swapping the two network
wires at the master controller.
Standard RS485 wiring practices apply. Termination resistors need
to be applied at each end of the network cable. RS485 repeaters
may need to be used for long cable runs, or if greater than 32 nodes
are needed on the network.
Control Terminal 16 on the MD60 must also be connected to PE
ground (there are two PE terminals on the drive).
Parameter Configuration
The following MD60 parameters are used to configure the drive to
operate on a network.
Table F.1 – MD60 Network Parameters
Parameter Details
P036 (Start Source) Set to 5 “RS485 (MDI) Port” if Start is controlled
from the network.
P038 (Speed Reference) Set to 5 “RS485 (MDI) Port” if the Speed Reference
is controlled from the network.
A103 (Comm Data Rate) Sets the data rate for the RS485 (MDI) Port. All
nodes on the network must be set to the same data
rate.
A104 (Comm Node Addr) Sets the node address for the drive on the network.
Each device on the network requires a unique node
address.
A105 (Comm Loss Action) Selects the drive’s response to communication
problems.
A106 (Comm Loss Time) Sets the time that the drive will remain in
communication loss before the drive implements
A105 (Comm Loss Action).
A107 (Comm Format) Sets the transmission mode, data bits, parity and
stop bits for the RS485 (MDI) Port. All nodes on the
network must be set to the same setting.