gefran GFX4-ETH1 Installation And Operation Manual page 5

According the Modbus Object Services following functions are supported. Each Modbus command is represented by
a CIP service code of the Modbus Object (0x44).
The list of predefined functions from the specification and the supported services by the GFX4-ETH1 are defined in
the tables below.
List of Modbus Object Services
Service Need in Implem
code Class
0x4B N/A
0x4C N/A
0x4D N/A
0x4E N/A
0x4F N/A
0x50 N/A
0x51 N/A
List of supported Modbus Object Services
CIP Corresponding Modbus
Service Function code
0x4B
0x4C
0x4D
0x4E
0x4F
0x50
0x51
80409D_MSW_GFX4-ETH1_04-2013_ENG
Service Name
Instance
Required Read Discrete Inputs
Required Read Coils
Required Read Input Registers
Required Read Holding Registers
Required Write Coils
Required Write Holding Registers
Required Modbus Passthrough
Supported
FC 2
FC 1
FC 4
FC 3
FC 15
FC 16
FC XX
Yes FC 1 and 2 are synonymous
Yes
Yes FC 3 and 4 are synonymous
Yes
Yes
Yes
No
Description
of service
Reads one or more contiguous
discrete input(s)
Reads one or more contiguous coil(s)
Reads one or more contiguous input
register(s)
Reads one or more contiguous
holding register(s)
Write one or more contiguous coil(s)
Write one or more contiguous holding
register(s)
Provides encapsulation of any public
or private Modbus function
Remark
5