YASKAWA SVC User Manual page 593

11.3 MECHATROLINK-III I/O Module Settings
11.3.4 I/O Command Details
Read Parameter Command
Reads an I/O Module parameter.
Important
 Command Format
OW
OW + 1
OW + 2
OW + 3
OW + 4
OW + 5
OW + 6
OW + 7
 NO: Parameter Number
 SIZE: Parameter Size (Bytes)
 PARAMETER: Parameter Data
 Execution and Operating Procedure
1.
Make sure that the following condition is met.
2.
Set the following parameters.
• NO (Parameter Number)
• SIZE (Parameter Size)
Setting Precautions
Make any necessary changes to NO (Parameter Number) or SIZE (Parameter Size) before executing
the Read Parameter command or during the same scan that the I/O Command register is set to 3. Do
not change these settings during execution of the Read Parameter command.
3.
Set the I/O Command register to 3 to execute the Read Parameter command.
11-20
Some I/O Module devices do not support the Read Parameter command. Refer to the product
specifications of the I/O Module for details.
Output Registers
7 6 5 4 3 2 1 0
Read Parameter (= 3)
Not used.
Command Control
NO
SIZE
Not used.
•
•
•
No. Execution Condition
I/O command execution must be com-
1
pleted.
Input Registers
7 6 5 4 3 2 1 0
IW Read Parameter (= 3)
Master Status
IW + 1
Command Status
IW + 2
IW + 3
IW + 4
PARAMETER Low
IW + 5
IW + 6
IW + 7
Confirmation Method
Command Status bit 2 (CMDRDY) = 1
NO
SIZE
Not used.
High
•
•
•