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