This bit is OR’d with the input terminal function
Parameter Set Selection, i.e. a logic “1” on the input
terminal OR in the control word bit will activate parameter set 2!
Resetting the Inverter after a Fault
Bit 6 of the control word resets the inverter via the process data channel in the case of a fault. Every
set can only be initiated with a 0/1 transition in the control word. All other reset options continue to
be active.
3.4.2
Control Word 1
In addition to the most important drive functions contained in the basic control block, control word
1, in its more significant byte, contains function bits for internal setpoint functions, which can be
generated in the MOVITRAC
®
31.. inverter. For example, control word 1 allows the internal fixed
setpoints or the motorized potentiometer function to be activated.
When using the internal setpoint functions, control word 1 enables you to control the inverter with
only one process output data word in the I/O or peripheral section of the higher-level automation
unit.
Bit:
Function
Assignment
8
Direction of rotation for motor pot. or
internal setpoints
0 = Direction of rotation CW
1 = Direction of rotation CCW
9
10
Motor pot. acceleration
Motor pot. deceleration
10
9
0
0 = No change
1
0 = Deceleration
0
1 = Acceleration
1
1 = No change
11
12
Selection of internal fixed setpoints n11 to
n13 or n21 to n23 resp.
12
11
0
0 = Speed setpoint via process output data word 2
0
1 = Internal setpoint n11 (n21)
1
0 = Internal setpoint n12 (n22)
1
1 = Internal setpoint n13 (n23)
13-15
Reserved
Reserved bits are generally to be set to zero!
When these internal setpoint functions are activated, entry of a speed setpoint via a different process
output data word will no longer be effective.
15 14 13 12 11 10 9
8
7
6
5
4
3
2
1
0
0: Controller inhibit/enable
1: Enable/rapid stop
3: Hold control
4: Ramp generator selection
6: Reset
5: Parameter set selection
7: Reserved
2: Enable/stop
8: Direction of rotation of motorized potentiometer
9: Motor. pot. acceleration
12: n12 (n22)
14: Reserved
13: Reserved
15: Reserved
10: Motor. pot. deceleration
11: n11 (n21)
Permanently defined
Internal setpoint functions
00326AEN
Fig. 16: Definition of control word 1
3
Inverter Control
with Process Data
MOVITRAC
®
31.. Fieldbus Unit Profile
29
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