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5.4.3 RS485 Communication Setup
When establishing communication between MotionView and a PositionServo drive,
a communication method must be selected. The connection choice can be either
“UPP over RS485/RS232” or “Ethernet”. The “UPP over RS485/RS232” selection
establishes a RS485 connection between MotionView and the first drive on the
network. Multiple drives can then be added to the network via RS485. Each drive
on the network will have a different Node Address. When setting up communications
the node address of the target drive must be set. MotionView will then send out a
communications packet to the first drive on the network, via the RS485 connection. If
the node address set in this packet doesn’t match the node address of the drive, the
drive will resend the packet, via RS485, to the next drive on the network. This process
will continue until the target drive is reached. The following message, “Device with
address # not present in the network” will appear If the target node could not be found.
5.4.4 MODBUS RTU Support
As a default, the Ethernet, RS485 interfaces are configured to support MotionView
program operations. In addition, the Ethernet port can be configured to support
MODBUS TCP/IP slave protocals and the RS485 interface can be con
figured to
support the MODBUS RTU slave protocol. These interfaces are configured through
the MotionView program environment. When configured for MODBUS operation, the
baud rate for RS485 is set by the parameter “Modbus baud rate” in MotionView.
NOTE: if the RS485 port is con
figured for MODBUS operation, then the command
repeat function, (see 5.4.3), is unavailable even if baud rates are set the same for both
interfaces. MODBUS RTU requires 8 data bits.
The MODBUS RTU slave interface protocol definitions can be found in the MotionView
help menu under “Product Manuals”.
5.5 Motor Selection
The PostionServo drive is compatible with many 3-phase AC synchronous servo
motors as well as 3-phase AC asynchronous servo motors. MotionView is equipped
with a motor database that contains over 600 motors for use with the PositionServo
drive. If the desired motor is in the database, no data to set it up is needed. Just select
the motor and click “OK”. However, if your motor is not in the database, it can still be
used, but some electrical and mechanical data must be provided to create a custom
motor profile. The auto-phasing feature of the PositionServo drive allows the user to
correctly determine the relationship between phase voltage and hall sensor signals,
eliminating the need to use a multi-channel oscilloscope.
5.5.1 Motor Connection.
Motor phase U, V, W (or R, S, T) are connected to terminal P7. It is very important that
motor cable shield is connected to Earth ground terminal (PE) or the drive’s case.
The motor’s encoder/resolver feedback cable must be connected to terminal P4. If
a resolver option module is used, connect to terminal P11, and if a second encoder
option module is used, connect to terminal P12.
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