Technology Module TM StepDrive 1x24..48V/5A
MA 1303-A007 EN
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– The CPU changes to STOP and interrupts the program processing. The di-
agnostic alarm OB (e.g. OB 82) is activated. The action that triggered the
alarm is written to the start information of the diagnostic alarm OB.
– The CPU remains in RUN even if there is no diagnostic alarm OB in the
CPU. As far as possible, the technology module continues operation while
the error is pending.
Details of the error event are available when you execute the RALRM program in-
struction (alarm readout information).
See also chap.14.2 (Diagnosis Notifications).
6.5.3 Indexer Configuration
6.5.3.1 Start-Stop Frequency (only for PM Mode)
The start/stop frequency is the maximum frequency at which the stepper motor can start or
stop without a ramp, without loss of steps. The start-stop frequency depends on various
variables such as motor type, load and mechanics, power stage.
This value determines whether the frequency profile of the motor is trapezoidal or rectan-
gular. Run frequencies below this value are spontaneously added to the motor, i.e. without
ramp. For run frequencies above this value, a ramp is used, i.e. the motor is accelerated to
the final frequency with constant acceleration.
This frequency is also used to retract a limit switch.
Value can be set from 1 Hz to 250 kHz.
