Preset Command; Measure Command; Diag Command; Temp_Limit_Set Command - Encoder A36R Technical Reference Manual

Model A36R
Always check that the Command Status register is in the idle state (0x00) before
attempting to send a command.

8.6.1 PRESET Command

The PRESET command sets the current shaft position to a ST/MT value specified by the user. The desired ST/MT values to be
configured are set in the ST Preset and MT Preset registers respectively. These are located in Bank 0x45 at addresses 0x01 (ST) and
0x05 (MT). See Table 15.

8.6.2 MEASURE Command

The MEASURE command reads the current ST and MT position, as well as the current calculated RPM. Once read, these values will
be readable from Bank 0x44 at addresses 0x07 (ST count), 0x0B (MT count), and 0x05 (RPM). See Table 14.

8.6.3 DIAG Command

The DIAG command reads all error and warning bits. Once read, the status of these bits will be readable from Bank 0x44 at
addresses 0x10 (error bits) and 0x11 (warning bits). See Table 14.
Description of all error and warning bits can be found in Section 6.2.

8.6.4 TEMP_LIMIT_SET Command

The TEMP_LIMIT_SET command sets the high/low temperature warning thresholds into the internal temperature sensor. The
values to be set can be user-configured via Bank 0x45 at addresses 0x09 (high limit) and 0x0B (low limit).
Note that these limit values are internal sensor junction temperatures. These will differ from ambient temperature and may need
to be adjusted experimentally to correlate with the application requirements.
Real-time temperature can be read via direct access (no bank select needed) at address 0x4E-0x4F. See Table 11.

9. CRC Details

Model A36R encoders include a CRC in the data frame for both SSI and BiSS C protocol options. The CRC can be used to verify data
integrity. The CRC is the same for both communication protocol options and details can be found below.
CRC start value
CRC polynomial
CRC results length
Different CRC lengths and starting values may be possible. Contact EPC details if this is a requirement for your application.
More details on CRC and calculation examples can be found on the BiSS Interface website at: biss-interface.com
1-800-366-5412 | encoder.com | sales@encoder.com
= 0x00
= 0x43
= 6 bits
T E C H N I C A L R E F E R E N C E M A N U A L
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EPC Technical Reference Manual – Model A36R
© 2023 Encoder Products Company, REV 11/08/2023