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Operating Instructions – MOVITRAC® B
5
Communication and unit profile
Startup
5.11 Communication and unit profile
MOVITRAC
®
B offers digital access to all drive parameters and functions via the com-
munication interfaces.
The frequency inverter is controlled via fast, cyclic process data. You can use this pro-
cess data channel to enter setpoints such as the setpoint speed, ramp generator time
for acceleration/deceleration, etc. as well as trigger various drive functions such as en-
able, control inhibit, normal stop, rapid stop, etc. You can also use this channel to read
back actual values from the frequence inverter, such as the actual speed, current, unit
status, fault number and reference signals.
In combination with the IPOS
plus®
positioning and sequence control integrated in the fre-
quency inverter, you can also use the process data channel as direct connection be-
tween PLC and IPOS
plus®
. In this case, the process data are not evaluated by the fre-
quency inverter but directly by the IPOS
plus®
program.
While the process data exchange generally occurs cyclically, the drive parameters can
be read or written acyclically using READ and WRITE services. This parameter data ex-
change enables you to implement applications in which all the important drive parame-
ters are stored in the master programmable controller, so that there is no need to make
manual parameter settings on the frequency inverter itself.
The use of a fieldbus system requires additional drive system monitoring such as time
monitoring of the fieldbus (fieldbus timeout) or even special emergency stop concepts.
You can customize the monitoring functions of MOVITRAC
®
B to suit your specific ap-
plication. You can determine, for instance, which fault response of the frequency inverter
should be triggered in the event of a bus error. For many applications, a rapid stop would
be the preferred response, but you can also freeze the latest setpoints.
As the functions of the control terminals are still active in fieldbus operation, you can still
implement fieldbus-independent emergency stop concepts via the terminals of the fre-
quency inverter.
The MOVITRAC
®
B inverter offers numerous diagnostic options for startup and service
purposes. For example, you can use the DBG60B keypad to control both setpoint values
sent from the higher-level controller as well as the actual values. You are also supplied
with a variety of additional information about the status of the communication interfaces.
An even more convenient diagnostic option provides the MOVITOOLS
®
MotionStudio
engineering software. It lets you set all drive and communication parameters and dis-
plays detailed information of interfaces and unit status.
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Summary of Contents for Movitrac B
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