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| Modbus Object (44 Hex, 1 Instance) | Object Specific Services (Instance Specific) | |
2.1.4.0.4. Read Holding Registers Service (4E Hex)
This service reads one or more holding registers from the Modbus Holding Register table. This service results
in the DeviceMaster EIP-MOD issuing a Read Holding Registers function (function code 0x03) to either the
Shared Memory or the Modbus Message Routing subsystem. Refer to CIP Standard Vol1_3.22 Section 5B-3
and/or MODBUS Application Protocol Specification V1.1b3.pdf at
2.1.4.0.5. Write Coils Service (4F Hex)
This service writes one or more coils to the Modbus Coils table. This service results in the DeviceMaster EIP-
MOD issuing a Write Multiple Coils function (function code 0x0F) to either the Shared Memory or the
Modbus Message Routing subsystem. Refer to CIP Standard Vol1_3.22 Section 5B-3 and/or MODBUS
Application Protocol Specification V1.1b3.pdf at
2.1.4.0.6. Write Holding Registers Service (50 Hex)
This service writes one or more holding registers to the Modbus Holding Registers table. This service results
in the DeviceMaster EIP-MOD issuing a Write Multiple Registers function (function code 0x10) to either the
Shared Memory or the Modbus Message Routing subsystem. Refer to CIP Standard Vol1_3.22 Section 5B-3
and/or MODBUS Application Protocol Specification V1.1b3.pdf at
2.1.4.0.7. Modbus Passthrough Service (51 Hex)
The Modbus Passthrough service provides a way for a client to initiate a specific Modbus function to a target
Modbus device. The Modbus request and response are encapsulated in the CIP request and response service
data fields with no modification. The DeviceMaster EIP-MOD does not attempt to perform any byte endian
conversion on the bytes in the data stream (either request or response). Refer to CIP Standard Vol1_3.22
Section 5B-3 and/or MODBUS Application Protocol Specification V1.1b3.pdf at
details.
2.1.4.0.8. Vendor Specific Write Single Coil Service (70 Hex)
This service writes one coil to the Modbus Coils table. This service results in the DEVICEMASTER
ETHERNET/IP- DeviceMaster EIP-MOD issuing a Write Single Coil function (function code 0x05) to either
the Shared Memory or the Modbus Message Routing subsystem. Refer to MODBUS Application Protocol
Specification V1.1b3.pdf at
Note: In order to use this service, the Enable Vendor Specific Modbus Object Services option on the EtherNet/
IP Stack Configuration web page must be selected.
2.1.4.0.9. Vendor Specific Write Single Register Service (71 Hex)
This service writes one holding register to the Modbus Holding Registers table. This service results in the
DeviceMaster EIP-MOD issuing a Write Single Registers function (function code 0x06) to either the Shared
Memory or the Modbus Message Routing subsystem. Refer to MODBUS Application Protocol Specification
V1.1b3.pdf at
www.modbus.org
Note: In order to use this service, the Enable Vendor Specific Modbus Object Services option on the EtherNet/
IP Stack Configuration web page must be selected.
2.1.4.0.10. Vendor Specific Write Mask Register (72 Hex)
This service performs a write mask operation on one holding register in the Modbus Holding Registers table.
This service results in the DeviceMaster EtherNet/IP-Modbus gateway issuing a Write Mask Register
function (function code 0x16) to either the Shared Memory or the Modbus Message Routing subsystem. Refer
to MODBUS Application Protocol Specification V1.1b3.pdf at
Note: In order to use this service, the Enable Vendor Specific Modbus Object Services option on the EtherNet/
IP Stack Configuration web page must be selected.
DeviceMaster EIP-MOD User Guide: 2000664 Rev. A
www.modbus.org
www.modbus.org
for more details.
for more details.
www.modbus.org
for more details.
for more details.
www.modbus.org
for more details.
www.modbus.org
www.modbus.org
for more details.
Chapter 2. EtherNet/IP Interface Profile (ControlLogix) - 23
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