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246 Fieldbus Communication
WAGO-I/O-SYSTEM 750
750-882 Media Redundancy ETHERNET Controller
Manual
1.5.0
Bit Access Reading (with FC1 and FC2)
Table 126: Bit Access Reading (with FC1 and FC2)
MODBUS address
Memory range
Description
[dec]
[hex]
0...511
0x0000...0x01FF Physical input area (1) First 512 digital inputs
512...1023
0x0200...0x03FF Physical output area (1) First 512 digital outputs
1024...4095 0x0400...0x0FFF
-
MODBUS exception:
“Illegal data address”
4096...8191 0x1000...0x1FFF %QX256.0...%QX511.15 PFC OUT area
Volatile PFC output variables
8192...12287 0x2000...0x2FFF %IX256.0...%IX511.15 PFC IN area
Volatile PFC input variables
12288...32767 0x3000...0x7FFF %MX0...%MX1279.15 NOVRAM
2 kB retain memory (max. 24 kB)
32768...34295 0x8000...0x85F7 Physical input area (2) Starts with the 513
th
and ends with the
2039
th
digital input
34296...36863 0x85F8...0x8FFF
-
MODBUS exception:
“Illegal data address”
36864...38391 0x9000...0x95F7 Physical output area (2) Starts with the 513
th
and ends with the
2039
th
digital output
38392...65535 0x95F8...0xFFFF
-
MODBUS exception:
“Illegal data address”
Bit Access Writing (with FC5 and FC15)
Table 127: Bit Access Writing (with FC5 and FC15)
MODBUS address
Memory range
Description
[dec]
[hex]
0...511
0x0000...0x01FF Physical output area (1) First 512 digital outputs
512...1023
0x0200...0x03FF Physical output area (1) First 512 digital outputs
1024...4095 0x0400...0x0FFF
-
MODBUS exception:
“Illegal data address”
4096...8191 0x1000...0x1FFF %IX256.0...%IX511.15 PFC IN area
Volatile PFC input variables
8192...12287 0x2000...0x2FFF %IX256.0...%IX511.15 PFC IN area
Volatile PFC input variables
12288...32767 0x3000...0x7FFF %MX0...%MX1279.15 NOVRAM
2 kB retain memory
32768...34295 0x8000...0x85F7 Physical output area (2) Starts with the 513
th
and ends with the
2039
th
digital input
34296...36863 0x85F8...0x8FFF
-
MODBUS-Exception:
“Illegal data address”
36864...38391 0x9000...0x95F7 Physical output area (2) Starts with the 513
th
and ends with the
2039
th
digital output
38392...65535 0x95F8...0xFFFF
-
MODBUS-Exception:
“Illegal data address”