4-38
Master Communication
MPH-02, MPB-02, MPD-02
DOK-INDRV*-MP*-02VRS**-FK01-EN-P
Drive Enable
The drive is activated by a positive edge of the drive enable signal. In the
case of drive controllers with SERCOS interface, the drive enable signal
corresponds to bit 15 in the master control word of the master data
telegram.
The controller enable signal is accepted, i.e. the drive switches from its
de-energized status to its energized status, when the following conditions
have been fulfilled:
•
SERCOS interface ready for operation (communication phase 4)
•
no drive error
•
power section switched on
In this status the display of the drive reads "Ab", the diagnostic message
via the S-0-0095 parameter is
A0012 Control and power sections
ready for operation
.
When drive enable signal is set, the display changes to "AF", the
diagnostic message then shows the activated mode of operation (e.g.
A0101 Drive in VELOCITY control
).
Drive Halt
The "Drive Halt" signal is status-controlled and active when the
signal = 0 V. The input signal is mapped to the master control word bit 13.
Drive Status Word
The drive status word is part of the drive telegram. It contains all
important status information from the drive, such as:
•
readiness for operation of the control and power sections
•
drive
error
•
change bits class 2 and 3 diagnostics
•
current operating mode
•
real-time status bits 1 and 2
•
status information for the service channel
Note:
The drive status word is mapped to parameter S-0-0135. The
exact structure of this parameter is described in the separate
Parameter Description.
See Parameter Description "S-0-0135, Drive status word"
The drive status word is cyclically transmitted to the control unit with every
drive telegram in the SERCOS clock (see
S-0-0002, SERCOS cycle time
(TScyc)
). For diagnostic purposes, the drive status word can be read via
the
S-0-0135, Drive status word
parameter.
Acknowledging Drive Enable
The drive acknowledges the drive enable setting in the drive status word
of the drive telegram. In the drive status word, bits 14 and 15 change from
"10" (control and power sections ready for operation, without torque) to
"11" (in operation, with torque) when drive enable is activated and has
been accepted.
The time that passes between the setting of the drive enable and its
acknowledgment is needed by the drive to establish its complete
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