Carlo Gavazzi Controls S.p.A.
–
32100
–
Belluno
INFO: www.carlogavazzi-automation.com Phone +39.
0437 355811
User Manual
Modbus Master / SNMP Agent
Document code: SIU-SNM-01_ENG
Revision 1.0
2020-12-03
Page 21 / 25
The TRAP messages are contained in the MIB tree and they have these OIDs:
TRAP 1 (first row of “Set SNMP Access -> SNMP Read” table): .1.3.6.1.4.1.49314.1.1.2.1.
1
TRAP 2 (second row of “Set SNMP Access -> SNMP Read” table): .1.3.6.1.4.1.49314.1.1.2.1.
2
TRAP X (Xth row of “Set SNMP Access -> SNMP Read” table): .1.3.6.1.4.1.49314.1.1.2.1.
X
SNMP COMMUNICATION (Fixed Map)
In order to read/write the data from/to Modbus side, it is necessary to use specific SNMP commands in
order to see the SNMP Input and write the SNMP Output.
Reading Modbus data from SNMP
:
In order to read the data from the SIU-SNM-01
it is necessary to use the “snmpget” command. The Input
array is contained to t
his internal directory: 1.3.6.1.4.1.33118.1.1.1.4.x.0, where ‘x’ is the number of data
block. Each data block has a dimension of 128 bytes.
Example: you want to read information of the data block 3. The structure of the command to send is:
snmpget
–v1 –cprivate “IP Address of the converter” 1.3.6.1.4.1.33118.1.1.1.4.
3
.0
Figure 8a: MIB Tree Input
