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Fieldbus control with the embedded fieldbus 307
DCU communication profile
Because the DCU profile extends the control and status interface to 32 bits, two
different signals are needed for both the control (
and
and
) words.
The following tables describe the Control word content for the DCU profile.
DCU profile Control word, parameter
Bit
Name
Value
Information
0
STOP
1
Stop according to either the stop mode parameter (
) or
the stop mode requests (bits 7 and 8).
Note:
Simultaneous STOP and START commands result in
a stop command.
0
No operation
1
START
1
Start
Note:
Simultaneous STOP and START commands result in
a stop command.
0
No operation
2
REVERSE
1
Reverse direction. The direction is defined by using the
XOR operation on bit 2 and 31 (= sign of the reference)
values.
0
Forward direction.
3
LOCAL
1
Enter the local control mode.
0
Enter external control mode.
4
RESET
-> 1
Reset.
other
No operation
5
EXT2
1
Switch to external control EXT2.
0
Switch to external control EXT1.
6
RUN_DISABLE
1
Activate Run disable.
0
Activate Run enable.
7
STPMODE_R
1
Stop along currently active deceleration ramp (bit 10). Bit 0
value must be 1 (= STOP).
0
No operation
8
STPMODE_EM
1
Emergency stop. But does not cause an EMERGENCY
STOP alarm.
Bit 0 value must be 1 (=STOP).
0
No operation
9
STPMODE_C
1
Coast to stop. Bit 0 value must be 1 (= STOP).
0
No operation
10
RAMP_2
1
Use acceleration/deceleration ramp pair 2 (defined by
parameters
).
0
Use acceleration/deceleration ramp pair 1 (defined by
parameters
).
11
RAMP_OUT_0
1
Force ramp output to zero.
0
No operation
12
RAMP_HOLD
1
Halt ramping (Ramp function generator output held).
0
No operation
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