Lenze 931E/K Small Drives Control - Manual (Page 159)

Appendix
Communication interfaces
Control via the serial interface
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159 SW−HB 13.0002−EN 4.1
10.2.2 Control via the serial interface
Functions available
The 931E/K servo positioning controller has an asynchronous serial interface which is in
most cases used for the parameterisation of the servo positioning controller.
The interface can also be used to control the controller in the application, if the response
time of the drive is not particularly important.
In this case, communication will take place via so−called communication objects. Some
communication objects are used to read status variables such as current and speed. Other
communication objects are used to read and write parameters.
Each communication object includes the following values:
ƒ min. permissible setting
ƒ max. permissible setting
ƒ Set parameter value
ƒ Controller−internal parameter value
)
Note!
ƒ For more information on the command syntax, please see the chapter
"Serial communication protocol" (
¶ 163).
The chapter "Communication object list" (
¶ 165) contains a list of all
communication objects supported.
ƒ The controller−internal parameter value may slightly differ from the set
value because the servo positioning controller internally uses different units
and normalisations than the communication objects.
Serial communication of the SDCparameterisation program
The parameterisation program communicates with the 931E/K servo positioning
controller via the serial interface.
By default, the parameterisation program uses the following settings:
ƒ COM1interface
ƒ Baud rate = 9600 baud (default setting for the servo positioning controllers)
ƒ 8 data bits, 1 stop bit, no parity check. These settings cannot be changed!
The individual commands are defined in a protocol. A list of the commands can be found
in the chapter "Serial communication protocol". (
¶ 163)
When the program is started, the program tries to build up communication with a servo
positioning controller. If communication cannot be established, an error message will
appear.
. In this case, the communication data must be set correctly. For this, you need to
know the serial interface (COM port number) and the baud rate.