2014-02
40
IC-KP-B17-AIDA1
Commands
7.3.5 MODBUS exception codes
The device issues a response for each MODBUS transaction. The following table contains a list
of possible exception codes:
7.4 Communication via Ethernet/IP
7.4.1 General information on communication via Ethernet/IP
Ethernet/IP is an open fieldbus standard, which enables the exchange of data between
programmable logic controllers (PLCs), PCs, control systems, monitoring systems, sensors
and actuators.
Please visit the ODVA website at www.odva.org for more information about Ethernet/IP.
7.4.2 Performance spectrum
■
Implicit message
■
Explicit message
■
PCCC
7.4.3 PLC settings for implicit communication
The following parameters must be configured in addition to the IP address:
The lower limit of the RPI is 10 ms.
7.4.4 Data/Command transfer
Data is exchanged with the control interface using commands that the device recognizes.
There is an important difference between these commands and commands used for TCP/IP
and MODBUS protocols: Ethernet/IP commands do not contain parameters for the command
length.
The commands are transferred via Ethernet/IP objects, i.e., objects from classes 04h, 64h, and
65h. There are always two different modes available, which may not be confused: "Mixed
mode" and "Separated mode".
Code Name Description
01 Illegal function The function code is not: 03h, 16h, 17h.
02 Illegal data address The registers to be written or read are outside of the
defined range.
03 Illegal data value The number of data sets to be read or written is invalid.
04 Slave device failure Internal error
06 Slave device busy An attempt is made to access a channel that is already
being used by another client.
0A Ga te w ay p a t h
unavailable
The device ID is not 1 or 2.
Table 7.15 Exceptions of MODBUS transactions
Assembly instance Size (32 bits)
Input 150 - 162 (output + 50d) 2-15*
Output 100 - 112 2-15*
Configuration 112 0
Table 7.16 PLC settings for implicit communication
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