Technical data

Fieldbus Communication • 231
MODBUS Functions
WAGO-I/O-SYSTEM 750
BACnet/IP Controller
Bit Access Writing (with FC5 and FC15):
MODBUS Address
[
dec
]
[
hex
]
Memory Range Description
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
8kB retain memory (max. 24kB)
32768
... 34295
0x8000
... 0x85F7
Physical Output Area (2) Starts with the 513
th
and ends with
the 2039
th
digital output
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”
4.3.5 Internal Variables
Address Access Length
(word)
Remark
0x1000 R/W 1 Watchdog-Time read/write
0x1001 R/W 1 Watchdog Coding mask 1-16
0x1002 R/W 1 Watchdog Coding mask 17-32
0x1003 R/W 1 Watchdog Trigger
0x1004 R 1 Minimum Trigger time
0x1005 R/W 1 Watchdog stop (Write sequence 0xAAAA, 0x5555)
0x1006 R 1 Watchdog Status
0x1007 R/W 1 Restart Watchdog (Write sequence 0x1)
0x1008 RW 1 Stop Watchdog (Write sequence 0x55AA or 0xAA55)
0x1009 R/W 1 MODBUS -and HTTP- close at Watchdog Timeout
0x100A R/W 1 Watchdog configuration
0x100B W 1 Save Watchdog parameter
0x1020 R 1-2 LED Error Code
0x1021 R 1 LED Error Argument
0x1022 R 1-4 Number of analog output data in the process image (in bits)
0x1023 R 1-3 Number of analog input data in the process image (in bits)
0x1024 R 1-2 Number of digital output data in the process image (in bits)
0x1025 R 1 Number of digital input data in the process image (in bits)
0x1028 R/W 1 Boot configuration