Technical data

230 • Fieldbus Communication
MODBUS Functions
WAGO-I/O-SYSTEM 750
BACnet/IP Controller
MODBUS-Address IEC61131
[
dec
]
[
hex
]
Address
Memory Range
12288
... 24575
0x3000
... 0x5FFF
%MW0
... %MW12287
NOVRAM
8kB retain memory (max. 24kB)
24576
... 25340
0x6000
... 0x62FC
%QW512
... %QW1275
Physical Output Area (2)
Additional 764 Words physical output data
25341
... 28671
0x62FD
... 0x6FFF
- MODBUS Exception: “
Illegal data address”
28672
... 29436
0x7000
... 0x72FC
%QW512
... %QW1275
Physical Output Area (2)
Additional 764 Words physical output data
29437
... 65535
0x72FD
... 0xFFFF
- MODBUS Exception: “
Illegal data address”
The digital MODBUS services (coil services) are Bit accesses, with which
only the states of digital I/O modules can be determined or changed. Complex
I/O modules are not attainable with these services and so they are ignored. Be-
cause of this the addressing of the digital channels begins again with 0, so that
the MODBUS address is always identical to the channel number, (i.e. the digi-
tal input no. 47 has the MODBUS address "46").
Bit Access Reading (with FC1 and FC2):
MODBUS Address
[
dec
]
[
hex
]
Memory Range Description
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
8kB retain memory (max. 24kB)
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”