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3.1.4.5.3
DIAG_RD_VAR (0x4C)
Read out status variable. The variable number determines the source to be
read from.
Byte
MB0
MB1
MB2
MB3
MB4
MB5
Variable
number
Byte
MB0
MB1
MB2
MB3
MB4
MB5
Return
Code
WAGO-I/O-SYSTEM 750
I/O Modules
Reference Commands – Mailbox Commands
Request
7
6
5
4
2
2
2
2
0x4C
T
Variable number
Reserved
Reserved
Reserved
0 ...
predefined variables are read (see chapter 3.6,
0x1000:
"Internal Status Variables")
0x1000 ...
predefined bits 0 ..... 0x100 are read (see chapter
0x1100:
3.4, "Bit field for I/O driver
")
0x40000000 ...
Direct reading out of RAM
0x40004000:
0xE0000000 ...
Direct reading out of controller periphery
0xE0200000:
0xFFE00000 ...
Direct reading out of controller periphery
0xFFFFFFFF:
Response
7
6
5
4
2
2
2
2
0x4C
T
Return Code
Variable (LSB)
Variable
Variable
Variable (MSB)
0x00:
OK
Diagnostics Commands
3
2
1
0
2
2
2
2
-
3
2
1
0
2
2
2
2
• 143
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