Siemens ET 757 E Series Instruções de Operação descarregar pdf (Página 101)

Commissioning and optimization (software)

7.4 Commissioning of communication between the S7 CPU and the frequency converter

ET 200pro FC

Operating Instructions, 11/2007, A5E01100763B AA

101

Bit Value Meaning Remarks

0 Maximum frequency

not reached

1 -- -- 11

0 Warning: Motor

current/torque limit

reached

1 Motor holding brake

enabled

Signal can be used to control a holding brake. 12

0 -- --

1 -- Motor data display overload status. 13

0 Motor overload --

1 Clockwise rotation -- 14

0 Counter-clockwise

rotation

1 -- -- 15

0 Converter overload For example, current or temperature

7.4.2.2 Examples

Writing PROFIdrive process data

In this example, the control word STW1 and the setpoint frequency are written in PROFIdrive

mode. The inputs E0.0 and E0.6 are linked to the Start/Stop bit or to the Acknowledge Fault

bit of the control word STW1.

The process data are written in the cyclical time slice of the S7 (e.g. OB1) at logical address

256 of the frequency converter.

Note

Please note that the way cyclic data are interpreted depends on how the frequency converter

is parameterized (P2050, P0922).

Four bytes of process data are always transferred to the central control unit consistently. Use

of the SFC14 and SFC15 is not necessary.

1 2 ... 96 97 98 99 100 101 102 103 104 105 106 ... 189 190

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Siemens ET 757 E Series Instruções de Operação Página 101