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Direct positioning „sd, Read / write offset „u“ (55h), Read / write profile number „v“ (56h) – Baumer N 153 User Manual

Page 11: N 153, Example 1: read offset, Example 2: write offset, Response in both examples

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N 153

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11

Direct positioning „SD“

This command may be utilized for direct positioning operations. Only the target less any profile number is trans-
mitted to SPA. The profile number after the command “S” is replaced by sub command “D” ( = dimension). Mo-
tor start enable requires transmitting in addtion motor start command “D”.

Example 4: Write position value for direct positioning operation (less profile)

SOH Adr Cmd Sub

Position value = 278.25

EOT CRC

Transmission

01h 20h 53h 44h 30h 32h 37h 38h 32h 35h

04h 6Bh

SOH Adr Cmd Sub

Position value = 278.25

EOT CRC

Response

01h 20h 53h 44h 30h 32h 37h 38h 32h 35h

04h

6Bh

Note: The position value is saved in the non-volatile memory and will be retained in case of power failure. In this
case the previously selected profile is utilized again.

Transmitting targets with simultaneous motor start signal

Specific applications require autonomous re-alignment of shafts to the new target when it is received without
prior enable signal by command „D“. For this intention the following commands are available:

SPF transmits to SPA profile number together with motor start signal for automated positioning operations
SDF transmits to SPA position value together with motor start signal for automated positioning operations

The addressed SPA is enabled by adding sub-command „F“ to the respective basic command. Since it is a pure
individual positioning operation, defined groups are not affected. Collision prevention is up to the operator.

Example: Write specific target utilizing command „SPF“ (profile number = 17; target = -12.50)

SOH Adr Cmd Sub1 Sub2 Profile=17

Target = -12.50

EOT CRC

Transmission

01h 20h 53h 50h 46h 31h

37h 2Dh 30h

31h

32h

35h

30h

04h A0h

SOH Adr Cmd Sub1 Sub2 Profile=17

Target = -12.50

EOT CRC

Response

01h 20h 53h 50h 46h 31h

37h 2Dh 30h

31h

32h

35h

30h

04h A0h

4.2.6. Read / write offset „U“ (55h)

This command is utilized to read or write the offset that is added to the true actual value. First however the func-
tion must be enabled in command bit parameter ‚a’ (61h).

Example 1: Read offset

SOH

Adr

Cmd

EOT

CRC

Transmission

01h

20h

55h

04h

26h

Example 2: Write offset

SOH

Adr

Cmd

Data (offset = –20.00)

EOT

CRC

Transmission

01h

20h

55h

2Dh

30h

32h

30h

30h

30h

04h

C3h

Response in both examples:

SOH

Adr

Cmd

Data (offset = –20.00)

EOT

CRC

Response

01h

20h

55h

2Dh

30h

32h

30h

30h

30h

04h

C3h

4.2.7. Read / write profile number „V“ (56h)

This command is utilized to read the number of the presently active profile respectively for profile alteration.

Example 1: Read active profile (active profile number = 38)

SOH

Adr

Cmd

EOT

CRC

Transmission

01h

20h

56h

04h

20h

SOH

Adr

Cmd Profile no. = 38 EOT

CRC

Response

01h

20h

56h

33h

38h

04h

28h

Response after reset upon having cleared all profiles:

SOH

Adr

Cmd Profile no. = FF EOT

CRC

Response

01h

20h

56h

3Fh

3Fh

04h

16h