Pixsys CNV510-PNET-RTU-A, User Manual

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pag. 26
ADVANCED FUNCTIONS:
In the CNV510-PNET-RTU-A are implemented some advanced commands that allows to check the functioning of the converter and send some Modbus commands directly from
Ethernet side. To use them, it is necessary to send UDP messages to the port 5000.
The function of each command and the structure of the UDP messages are described below.
B0 command
This command allows to enable/disable the Modbus polls on Modbus side.
REQ:
Byte 0 B1/bit7 B1/bit6 B1/bit5 B1/bit4 B1/bit3 B1/bit2 B1/bit1 B1/bit0 … Bn/bitn
0xB0 Poll 0 Poll 1 Poll 2 Pol 3 Poll 4 Poll 5 Poll 6 Poll 7 … Poll x
1 = Poll disabled
0 = Poll enabled
If the message is received correctly, the same message will be sent back by the converter.
Note:
In the UDP message, after the command’s identifier, you must enable/disable the Modbus reading requests and then the Modbus Writing requests.
Example:
In the section “Set Access” are defined 8 Modbus reading requests (“Modbus Read” table) and 8 Modbus writing requests (“Modbus Write” table). We want to disable the firsts 4
Modbus reading requests and the firsts 4 Modbus writing requests.
Byte 0 Byte 1 Byte 2
0xB0 bit7 bit6 bit5 bit4 bit3 bit2 bit1 bit0 bit7 bit6 bit5 bit4 bit3 bit2 bit1 bit0
Poll0 Poll1 Poll2 Poll3 Poll4 Poll5 Poll6 Poll7 Poll8 Poll9 Poll10 Poll11 Poll12 Poll13 Poll14 Poll15
1 1 1 1 0 0 0 0 1 1 1 1 0 0 0 0