42 | Fieldbus Guide | Version 1.02 www.invertekdrives.com
8
Ethernet/IP Communication
8.8.2. Explicit Messaging
Explicit messaging can be used to read or write a parameter setting.
All drives parameter variables have the data type INT (16 bit, 2-byte objects). The device parameters and the PLC program variables
must have the same data lengths.
Accessing drive parameters
Explicit messaging must be confi gured using the settings shown below.
Explicit Message Read Request Confi guration
Read Message Type Single Parameter Read Multiple Parameters Read
Service ID 14 (0x0E) 78 (0x4E)
Class ID 15 (0x0F) 68 (0x44)
Attribute ID 1 (0x01) -
Instance ID Modbus Register assigned to the Parameter Number
Data Type INT (16-bit)
Data Size 16-bit 16-bit x Number of Requested Elements
Explicit Message Write Request Confi guration
Read Message Type Single Parameter Write Multiple Parameters Write
Service ID 16 (0x10) Not supported
Class ID 15 (0x0F) Not supported
Attribute ID 1 (0x01) Not supported
Instance ID Modbus Register assigned to the Parameter Number
Data Type INT (16-bit)
Data Size 16-bit -
8.8.2.1. Parameter data transfer - confi guration example based on Allen Bradley Studio 5000 Logix Designer
8.8.2.1.1. Read Parameter Value
Please add the MSG function to the program.
Massage Confi guration – Parameter Read
Confi guration Tab: Communication Tab:
Modbus Register assigned to the Parameter Number
16-bit x Number of Requested Elements
Explicit Message Write Request Confi guration
Multiple Parameters Write
Modbus Register assigned to the Parameter Number
8.8.2.1. Parameter data transfer - confi guration example based on Allen Bradley Studio 5000 Logix Designer
8.8.2.1.1. Read Parameter Value
Please add the MSG function to the program.
Massage Confi guration – Parameter Read
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