Balluff BIS M-370-000-A02, Manual, Page: 102 / 198

MODBUS TCP INTERFACE
95
6
6 MODBUS TCP INTERFACE
NOTE
For BIS M-626-069-A01-06_ models.
One of the most popular and well-proven industrial automation protocols in use today is
Modbus. Modbus is an open client/server application protocol. Modbus TCP allows the
Modbus protocol to be carried over standard Ethernet networks. Modbus TCP is managed by
the Modbus-IDA User Organization.
6.1 MODBUS TCP OVERVIEW
Under the Modbus TCP protocol, the BIS M-626_ acts as a Modbus Server and the PLC acts
as a Modbus Client. By utilizing Produce and Consume registers for mapping commands and
responses, data produced by the BIS M-626_ is consumed by the Modbus Client and data
produced by the Modbus Client is consumed by the BIS M-626_.

Modbus Client (Host or PLC) must connect to the Modbus Server (BIS M-626_) on port
502

Maximum number of words transferred to/from an RFID tag per read/write cycle: 100
Words / 200 Bytes

Disable any firewall services running on the PC. Firewalls can potentially block
communications between the BIS M-626_ and the host and/or PLC
6.2 MODBUS TCP CONFIGURATION VIA HTTP SERVER
To configure the BIS M-626_ for Modbus TCP communications, begin by assigning the
controller a locally compatible IP address.
Through a standard Web browser, you can utilize the BIS M-626_
’s
HTTP Server to access
an embedded suite of controller configuration tools, called the “
On
Demand Utilities
.” Among its features is the ability to modify and save changes to the
controller’s IP address, which is stored internally on the BIS M-626_.
BIS M-626_ Industrial Ethernet RFID Controller - Default IP Address:
192.168.253.110
Setting the BIS M-626_ IP Address
To set the BIS M-626_
’s IP address using the
HTTP Server, follow the steps below:
1. Open a Web browser on the host.
2. In the URL address field, enter the BIS M-626_
’s IP address (
192.168.253.110 =
factory default).
3. Press ENTER .