Saia PCD2.H310, Руководство пользователя

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Summary of software elements PCD2.H31x
Page A-12
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SAIA-Burgess Electronics Ltd.
(2H3-AA-E.DOC)
26/762 E2
RdActVel
Instruction: Read Actual Velocity
[06]
Function description:
This instruction can be use to read the actual velocity of motion. For each
new reading of the velocity this instruction shuld be executed.
The processor format for velocity is 14 bits integer and 16 bits fractional
number. With the present instruction the processor only outputs the integer
part. This means that, at low velocities, values obtained are not comparable
with the result of the 'RdTargVel' instruction, which contains the fractional
part.
If the machine factor is less than 1, low velocities are difficult to read, as
the fractional part of the velocity is not available.
Description of input and output elements concerned:
Par. Designation/function Type Format Value Comment
= 1 Module number K 1 - 16
= 2 Instruction: RdActVel
= 3 PCD register for
actual velocity R integer 30 bit *) dependent on ma-
chine factor
*) Resolution 14 bit
Exec
Function Block
Index modified: no
Processing time: 2.7 ms
= 2
= 1
RdActVel
Module number
= 3
Register
for result