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240 Fieldbus Communication
WAGO-I/O-SYSTEM 750
750-880, 750-880/025-000 ETHERNET Programmable Fieldbus Controller
Manual
Version 1.0.1
Register Access Writing (with FC6, FC16, FC22 and FC23)
Table 127: Register access writing (with FC6, FC16, FC22 and FC23)
MODBUS address
IEC 61131
[dec]
[hex]
address
Memory range
0...255 0x0000...0x00FF
%QW0...%QW255 Physical output area (1)
First 256 words of physical output data
256...511
0x0100...0x01FF
%IW256...%IW511 PFC IN area
Volatile PFC input variables
512...767 0x0200...0x02FF
%QW0...%QW255
Physical output area (1)
First 256 words of physical output data
768...1023
0x0300...0x03FF
%IW256...%IW511 PFC IN area
Volatile PFC input variables
1024...4095 0x0400...0x0FFF
-
MODBUS exception:
“Illegal data address”
4096...12287 0x1000...0x2FFF
-
Configuration register ( see following
chapter „Configuration Functions“)
12288...24575 0x3000...0x5FFF %MW0...%MW12287 NOVRAM
24 kB retain memory *)
*) In Target settings RETAIN on 0, flags
on MAX (24 kB)
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”
Pos: 109.21 /Alle Serien (Allgemeine Module)/Feldbuskommunikation/MODBUS/MODBUS-Register-Mapping - Absatz Coil-Dienste, Bitzugriffe @ 3\mod_1235393917265_21.doc @ 27584 @ @ 1
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. Because 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 digital input
no. 47 has the MODBUS address "46").
Pos: 109.22 /Alle Serien (Allgemeine Module)/Feldbuskommunikation/MODBUS/MODBUS-Register-Mapping - Bitzugriff Lesen (mit FC1 und FC2) NOVRAM 2 statt 8 kB (881) @ 8\mod_1278681413601_21.doc @ 59524 @ @ 1