AMU Use
19
than the speed should change to 30x1500/50=900
rpm.
3.3.3.4. Communication settings
Setting the device address:
If the AMU networking options are to be used, the AMU network address must be supplied.
By default this is set to 0, which by convention is the address of the host terminal. Use of
this address will therefore disrupt communications over the network and must be changed
prior to connection. Any address between 1 and 255 can be selected although it is
important to check that the selected address is not in use by any other device on the same
node.
It is recommended that the motor serial number (or any other short identifier string) be
entered as a means of identifying the motor to the software. This is not obligatory, and
both the networking software and AMU can function without this information.
Other communications settings:
All other communications settings should be left at the factory defaults if the AMU
networking software is being used. If another software package is employed (i.e. SCADA
software), please refer to its documentation for communication settings.
AMU can use both RS422 (4-wire) and RS485 (2-wire) standards. The RS422 standard can be
used for up to 19200 Baud rates and the RS485 standard can be used for up to 9600 Baud
rates. The recommended communication standard for AMU is RS422 (4-wire).
3.4. Running AMU
3.4.1. Introduction
Having configured AMU for a particular motor, it can now be used for its intended purpose
of the condition of the motor.
3.4.2. Alarm messages and status indication
3.4.2.1. Alarms specific to the motor
AMU divides warning messages into the categories of warnings, alarms and errors.
Warnings inform the user that non-critical conditions have arisen that the user should be
aware of but do not affect the performance of AMU. Alarms provide information specific to
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