YASKAWA SVC - Page 593

11.3 MECHATROLINK-III I/O Module Settings
11.3.4 I/O Command Details
11-20
Read Parameter Command
Reads an I/O Module parameter.
 Command Format
 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.
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 Input Registers
7 6 5 4 3 2 1 0 7 6 5 4 3 2 1 0
OW Read Parameter (= 3) IW Read Parameter (= 3)
Not used. Master Status
OW + 1
Command Control
IW + 1
Command Status
OW + 2
NO
IW + 2
NO
OW + 3 SIZE IW + 3 SIZE
Not used. Not used.
OW + 4 IW + 4
PARAMETER Low
High
OW + 5 IW + 5
OW + 6 IW + 6
OW + 7 IW + 7
••
••
••
No. Execution Condition Confirmation Method
1
I/O command execution must be com-
pleted.
Command Status bit 2 (CMDRDY) = 1
Important