Read Memory Subcommand (Mem_Rd: 1Dh) - YASKAWA S-7 Series Command Manual

4.5 Read Memory Subcommand (MEM_RD: 1Dh)

4.5

Read Memory Subcommand (MEM_RD: 1Dh)

Data Format
Phases in which the
Command can be Executed
Processing Time
Byte
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
Command Parameters
The details of MODE/DATA_TYPE are described below.
bit7
MODE = 1: Volatile memory, 2: Not supported
DATA_TYPE = 1: Byte, 2: Short, 3: Long, 4: Not supported
SIZE: Data size for reading (of type specified by DATA_TYPE)
ADDRESS: Initial address for reading
DATA: Read data
4-6
2, 3
Within 200 ms
MEM_RD
Command Response
1Dh 1Dh
SUB_CTRL SUB_STAT
Reserved (0) Reserved (0)
MODE/DATA_- MODE/DATA_-
TYPE TYPE
SIZE SIZE
ADDRESS ADDRESS
Reserved DATA
bit6 bit5
MODE
Command Clas-
sification
Subcommand
• The MEM_RD subcommand reads the data stored in
virtual memory by specifying the initial address and the
data size for reading.
• Confirm the completion of the subcommand execution
by checking that RSUBCMD = MEM_RD (= 1Dh) and
SUB_STAT.SUBCMDRDY = 1, and also checking the
setting for ADDRESS and SIZE.
In the following cases, an alarm will occur and the sub-
command will not be executed.
• When the ADDRESS data is invalid:
SUBCMD_ALM = 9h (A.94A)
• When the MODE/DATA_TYPE data is invalid:
SUBCMD_ALM = 9h(A.94B)
• When the SIZE data is invalid:
SUBCMD_ALM = 9h (A.94D)
• While editing using SigmaWin or digital operator:
SUBCMD_ALM = Ah (A.95A)
Refer to the following section for details.

Method to Access Virtual Memory Areas on page 3-23.
bit4 bit3 bit2
Common Asynchronous
command command
Description
bit1 bit0
DATA_TYPE