Nidec SI-Interbus 2 MBd, User Manual

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SI-INTERBUS User Guide
Issue Number: 1
If an error occurs, an error message is returned, with codes to indicate the reason for
failure (see
Table 8-23 Control Techniques defined service error codes ).
Example
This example reads the value from the Post Ramp Reference (Pr 2.001 ) using the
READ service with the following arguments:
Index = 0x5002
Sub-index = 1
If the read is successful, the response message would contain the data value.
If the service is unsuccessful, the error information will be returned (see section 8-23
Control Techniques defined service error codes ).
8.3.3.2 WRITE object
Index: Menu
Sub-index: Parameter
The WRITE object is used to send a data value to a parameter within the drive.
Four data bytes are written to this object. If the write is successful, a success response
will be returned.
Table 8-22 PCP WRITE object data bytes
If an error occurs, an error message is returned, with codes to indicate the reason for
failure (see
Table 8-23 Control Techniques defined service error codes ).
Example
This example writes the value 200 (rpm) to the Preset Reference 1 (Pr 1.021 ) using the
WRITE service with the following arguments:
Index = 0x5001
Sub-index = 21
Data = 200
If the write is successful, the success response will be returned.
If the service is unsuccessful, the error information will be returned. See Table 8-23
Control Techniques defined service error codes .
Any scaling required of the data (i.e. to account for any decimal places the parameter
may have) will be handled by the SI-Interbus module.
Parameter 0 (Pr MM.000 ) cannot be accessed directly as the sub-index cannot be set to
a value of 0. Access to parameter 0 is provided via virtual parameter Pr 61.01 .
NOTE
NOTE
Data Byte Data Byte Order
1 High byte
2 Mid-high byte
3 Mid-low byte
4 Low byte
Parameter 0 (Pr MM.000 ) cannot be accessed directly as the sub-index cannot be set to
a value of 0. Access to parameter 0 is provided via virtual parameter Pr 61.01 .
NOTE
NOTE