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Safety
Product
Mechanical
information
information
installation
C06
Mode
RFC-A, RFC-S
Minimum
0
Default
2
Type
8 Bit User Save
Display Format
Standard
Coding
RW, Txt
Value
0
100 k
1
200 k
2
300 k
3
400 k
4
500 k
5
1 M
6
1.5 M
7
2 M
8
4 M
Drive Encoder Comms Baud Rate (C06) defines the baud rate used for encoder communications. Restrictions are applied to the baud rate for
different feedback devices, and so the baud rate may be different to the parameter value.
Drive Encoder Type (C01): SC.Hiperface
A fixed baud rate of 9600 baud is always used with this type of encoder so Drive Encoder Comms Baud Rate (C06) has no effect.
Drive Encoder Type (C01): SC.SSI, SC EnDat
Any baud rate that is within the range specified for the encoder may be used. The data from the encoder is not used for time critical functions, and so
it is recommended that the default value of 300 K baud is used unless this needs to be reduced because of a limitation imposed by the encoder.
Drive Encoder Type (C01): EnDat, BiSS, SSI
Any baud rate that is within the range specified for the encoder may be used. The line delay is measured during initialization, and used to compensate
this delay during communications with the encoder. Therefore there is no timing based restriction on the length of the cable between the position
feedback interface and the encoder. However, care should be taken to ensure that the wiring arrangement and the type of cable used are suitable for
the selected baud rate and the distance between the position interface and the encoder. See Drive Encoder Low Speed Update Rate Active (C27) for
more details on timing restrictions related to the drive sample times.
Drive Encoder Type (C01): Any other device
Drive Encoder Comms Baud Rate (C06) has no effect.
C07
Mode
RFC-A, RFC-S
Minimum
0
Default
16
Type
8 Bit User Save
Display Format
Standard
Coding
RW
Drive Encoder Type (C01): SC Hiperface, SC EnDat, SC SSI, EnDat, BISS, SSI
Drive Encoder Rotary Turns Bits (C07) is used to determine the number of bits within the comms messages from the position feedback device that
represent turns. For a single turn encoder Drive Encoder Rotary Turns Bits (C07) must be set to zero. It should be noted that some SSI encoders
include leading zeros before the turns information and in this case the number of turns bits should include the leading zeros. The most significant bits
in Drive Encoder Revolutions (J52) that are not included in the turns information provided by the encoder comms are held at zero. If Drive Encoder
Rotary Turns Bits (C07) = 0 (single turn encoder) the whole of Drive Encoder Revolutions (J52) is held at zero. The number of bits of position
information for a rotary device are calculated from Drive Encoder Rotary Turns Bits (C07) and Drive Encoder Comms Bits (C08). If the resulting value
is greater than 32 it is limited to 32.
Drive Encoder Type (C01): Any other device type
It is sometimes desirable to mask off the most significant bits of Drive Encoder Revolutions (J52), but this does not have to be done for the drive to
function correctly. If Drive Encoder Rotary Turns Bits (C07) = 0 the whole of Drive Encoder Revolutions (J52) is held at zero. If Drive Encoder Rotary
Turns Bits (C07) has any other value it indicates the number of bits in Drive Encoder Revolutions (J52) that are not held at zero. For example, if Drive
Encoder Rotary Turns Bits (C07) = 5, then Drive Encoder Revolutions (J52) counts up to 31 before being reset.
226
Electrical
Getting
User Menu A Commissioning
installation
started
Drive Encoder Comms Baud Rate
Text
Drive Encoder Rotary Turns Bits
Advanced
Diagnostics Optimization CT MODBUS RTU Technical Data
Parameters
Maximum
8
Units
Baud
Update Rate
Background read, Auto-configuration write
Decimal Places
0
Maximum
16
Units
Update Rate
Background read, Auto-configuration write
Decimal Places
0
E300 Design Guide
Issue Number: 1
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