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TMCM-351 TMCL Firmware V4.45 Manual (Rev. 1.06 / 2014-MAY-16)
35
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4.6.13
RFS (reference search)
The TMCM-351 module has a built-in reference search algorithm which can be used. The reference search
algorithm provides switching point calibration and three switch modes. The status of the reference search
can also be queried to see if it has already finished. (In a TMCL program it is better to use the WAIT
command to wait for the end of a reference search.) Please see the appropriate parameters in the axis
parameter table to configure the reference search algorithm to meet your needs. The reference search can
be started, stopped, and the actual status of the reference search can be checked.
Internal function:
the reference search is implemented as a state machine, so interaction is possible during
execution.
Related commands:
WAIT
Mnemonic:
RFS <START|STOP|STATUS>, <motor>
Binary representation:
INSTRUCTION NO.
TYPE
MOT/BANK
VALUE
13
0 START – start ref. search
1 STOP – abort ref. search
2 STATUS – get status
<motor>
0… 2
see below
Reply in direct mode:
When using type 0 (START) or 1 (STOP):
STATUS
VALUE
100 – OK
don’t care
When using type 2 (STATUS):
STATUS
VALUE
100 – OK
0
no ref. search
active
other values
ref. search active
Example:
Start reference search of motor 0
Mnemonic:
RFS START, 0
Binary:
Byte Index
0
1
2
3
4
5
6
7
Function
Target-
address
Instruction
Number
Type
Motor/
Bank
Operand
Byte3
Operand
Byte2
Operand
Byte1
Operand
Byte0
Value (hex)
$01
$0d
$00
$00
$00
$00
$00
$00
With this module it is possible to use stall detection instead of a reference search.