Description Of The Modbus Functions; Table 70: Exception Codes - WAGO -I/O-SYSTEM 750 XTR Manual

WAGO-I/O-SYSTEM 750 XTR
750-352/040-000 FC ETHERNET G3 XTR
Use register functions to access analog signals and coil functions to
access binary signals!
It is recommended that analog data be accessed with register functions  and
digital data with coil functions . If reading or writing access to binary signals is
performed via register functions , an address shift may occur as soon as further
analog modules are operated on the coupler/controller.
11.2.3

Description of the MODBUS Functions

All MODBUS functions are executed as follows:
1. A MODBUS TCP master (e.g., a PC) makes a request to the WAGO
fieldbus node using a specific function code based on the desired
operation..
2. The WAGO fieldbus node receives the datagram and then responds to the
master with the proper data, which is based on the master's request.
If the WAGO fieldbus node receives an incorrect request, it sends an error
datagram (Exception) to the master.
The exception code contained in the exception has the following meaning:
Pos : 94.9 /Serie 750 (WAGO-I/O-SYST EM)/F unktions beschr eibung/Fel dbus kommuni kati on/MOD BUS/Anwendung der M ODBU S-Funkti onen - T abelle "Excepti on-C odes" @ 7\mod_1265624178510_21.doc x @ 49943 @ @ 1

Table 70: Exception Codes

Exception code
0x01
0x02
0x03
0x04
0x05
0x06
0x08
0x0A
0x0B
Pos : 94.10 /Serie 750 ( WAGO-I/O-SYST EM)/Funkti onsbesc hrei bung/F eldbus kommuni kation/M ODBU S/Anwendung der MOD BUS-F unktionen - FC1 bis FC 6 @ 3\mod_1234957373125_21.doc x @ 27556 @ 444444 @ 1
The following chapters describe the datagram architecture of request, response
and exception with examples for each function code.
Meaning
Illegal function
Illegal data address
Illegal data value
Slave device failure
Acknowledge
Server busy
Memory parity error
Gateway path unavailable
Gateway target device failed to respond
Fieldbus Communication 155
Version 1.3.0
Manual