Table 49: Wbm Page "Modbus - WAGO -I/O-SYSTEM 750 Manual

180 Configuring via the Web-Based Management System (WBM) WAGO-I/O-SYSTEM 750

Table 49: WBM Page "Modbus"

Modbus UDP Multicast Address Setup
Entry
Enable Multicast
Do not reply to
Modbus UDP
multicast
messages
Address,
MCAST Address
1 ... 5:
P1/P2
(Enabled)
Modbus Configuration Registers
Entry
Range
0x1028 – 0x1037
0x2040 – 0x2043
Blocked Modbus Flag Registers
Entry 1 ... 5
Range Start
Range End
P1/P2
(Enabled)
Multicast function only with a valid MCAST address active!
Activate the function "Enable Multicast", without you enter an address not equal
to 0.0.0.0, the function is automatically deactivated, after a click on the [SUBMIT]
button.
If the function "Enable Multicast" is already enabled with valid addresses, you
can not describe this MCAST address fields with invalid addresses, because of a
click on the [SUBMIT] button resets to the last valid addresses. Thereby, the
function "Enable Multicast" maintains its State.
Manual
1.5.0
750-882 Media Redundancy ETHERNET Controller
Default value Description
Enable Multicast for MODBUS UDP transmission.

In addition to its own IP address, the fieldbus controller
receives MODBUS commands for the following
registered MCAST addresses.

Multicast for MODBUS UDP transmission is not enabled.
 The fieldbus controller receives MODBUS commands
only for the own IP address.
The reply to Modbus UDP multicast messages is

deactivated.

The reply to Modbus UDP multicast messages is

activated.
Multicast address 1... 5, for the multicast will be enabled.
0.0.0.0 The valid address range is shown in the WBM.
Multiple assigned addresses are not valid.
Multicast enabled.


Multicast disabled.

Default value Description
Enable MODBUS configuration register range.



Disable MODBUS configuration register range.

Default value Description
0x0000 Start address for the blocked ModbusTCP register range.
0x0000 End address for the blocked ModbusTCP register range.
Requests to the blocked addresses of ModbusTCP flag
register range are answered with the exception code

0x02 "Illegal Data Address". If a request is partially in the

valid and partially in the restricted range, this is also
answered with an exception.
The respective table entry is not considered.
