Connection to a fieldbus
6.3 Communication via PROFIBUS
Inverter with CU240B-2 and CU240E-2 Control Units
114 Operating Instructions, 07/2010, FW 4.3.2, A5E02299792B AA
Control word 1 (STW1)
Control word 1 (bits 0 … 10 in accordance with PROFIdrive profile and VIK/NAMUR, bits 11
… 15 specific to inverter).
Table 6- 9 Control word 1 and interconnection with parameters in the inverter
Significance Bit Valu
e
Telegram 20 All other telegrams
Remarks P No.
0 OFF1 Motor brakes with the ramp-down time p1121 at
standstill (f < f
min
) the motor is switched off.
0
1 ON With a positive edge, the inverter goes into the "ready"
state, with additionally bit 3 = 1, the inverter switches on
the motor.
p0840[0] =
r2090.0
0 OFF2 Switch off motor immediately, motor coasts to a
standstill.
1
1 No OFF2 ---
p0844[0] =
r2090.1
0 Quick stop (OFF3) Quick stop: Motor brakes with the OFF3 ramp-down
time p1135 down to standstill.
2
1 No quick stop (OFF3) ---
p0848[0] =
r2090.2
0 Disable operation Immediately switch-off motor (cancel pulses). 3
1 Enable operation Switch-on motor (pulses can be enabled).
p0852[0] =
r2090.3
0 Lock ramp-function generator The ramp-function generator output is set to 0 (quickest
possible deceleration).
4
1 Operating condition Ramp-function generator can be enabled
p1140[0] =
r2090.4
0 Stop ramp-function generator The output of the ramp-function generator is "frozen". 5
1 Ramp-function generator enable
p1141[0] =
r2090.5
0 Inhibit setpoint Motor brakes with the ramp-down time p1121. 6
1 Enable setpoint Motor accelerates with the ramp-up time p1120 to the
setpoint.
p1142[0] =
r2090.6
7 1 Acknowledging faults Fault is acknowledged with a positive edge. If the ON
command is still active, the inverter switches to"closing
lockout" state.
p2103[0] =
r2090.7
8 Not used
9 Not used
0 PLC has no master control Process data invalid, "sign of life" expected. 10
1 Master control by PLC Control via fieldbus, process data valid.
p0854[0] =
r2090.10
11 1 ---
1)
Direction reversal Setpoint is inverted in the inverter. p1113[0] =
r2090.11
12 Not used
13 1 ---
1)
MOP up The setpoint stored in the motorized potentiometer is
increased.
p1035[0] =
r2090.13
14 1 ---
1)
MOP down The setpoint stored in the motorized potentiometer is
decreased.
p1036[0] =
r2090.14
15 1 CDS bit 0 Not used Changes over between settings for different operation
interfaces (command data sets).
p0810 =
r2090.15
1)
If you change over from another telegram to telegram 20, then the assignment of the previous telegram is kept.
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