Orientalmotor aSTEP AZ Series, Руководство пользователя, Страница: 109 / 180

IO data
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4 PR
OFINE
T c
ommunica
tion
4-6 Data reading
This section explains the flow that data is read from the driver to the host controller.
There are the following two methods to read data.
• Use an area of “read data”
• Use an area of “assignable monitor”
„
When an area of read data is used
z
Area of IO data used
Input (driver
→ host controller)
Byte Description
30, 31 Read parameter ID_R
32, 33 Read/write status
36 to 39 Read data
Output (host controller → driver)
Byte Description
30, 31 Read parameter ID
z
Flow that data is read from
Host controller
1. Sets the parameter ID to be read from in the read
parameter ID.
3. Checks that the read parameter ID_R has been
the parameter ID having set.
Driver
4. Checks the RD-ERR has been turned OFF.
5. Reads the value of the read data.
2. The data is read every communication cycle.
Read parameter ID Parameter ID to be read from
1
5
4
3
2
Parameter ID to be read from
Value of parameter ID
to be read from
Communication cycle
Read parameter ID_R
RD-ERR
ON
OFF
ON
OFF
Read data
RD-ERR *
* If the parameter ID out of setting range is set to the read parameter ID, the RD-ERR is turned ON at the same time
that the read parameter ID_R is updated.