1. CIP Modbus Object Read Example
M340 BMXNOC0401 using Explicit unconnected_send request via DATA_EXCH to a Quantum 140NOC78000
Dec, 17, 2012
Rev 1.0
test

2. PLC Hardware Configuration
BMXNOC0401 ( ) to query NOC78000 ( ) with Explicit Messaging CIP Modbus Object Read holding register
The USB connection is for Unity to M340 PLC communications.
Unity7

3. M340 Unity Program Configuring the DATA_EXCH ADR Input:
Note to add the ‘Pin negation’ on the activity bit ManagParam[0].0
Configuring the DATA_EXCH ADR Input:
ADDM(‘0.1.0{ }UNC.CIP’)
Rack = 0 Module (Slot Number) = 1 Channel = 0 Remote Device IP address =
Message Type = Unconnected_send Protocol = CIP

4. Declaring Variables 1- data to send / CIP Request 24 bytes
header
24 bytes
message
footer
Length of data
to send in
ManagParam[3]
The DataToSend array has 3 part: the header (5 first word), the message (5 next word), the footer (2 last word)

5. Declaring Variables 2- Management parameters (array of 4 INT)
3- Reception data (array of 53 INT)

6. Example program in Quantum PLC
This data is incrementing every sec in the PLC to observe the data changing in the response.
%MW2 is referring to the DataToSend[8], first and only Word to be read in this example