24 Questions
What is the reserved port for Modbus TCP?
Port 502
When was the Modbus protocol originally published?
1979
What does Modbus TCP/IP refer to?
Modbus protocol with a TCP interface
What is the purpose of Modbus protocol?
Establish client and server communication between intelligent devices
Which company originally published the Modbus protocol?
Modicon
What does RTU stand for in Modbus RTU protocol?
Remote Terminal Unit
In which industry is Modbus often used to connect a system supervisory computer with an RTU?
Electric power industry
What does Modbus TCP/IP define?
Rules for organizing and interpreting the data
What is a common means of connecting industrial electronic devices?
Modbus
What is the application protocol that defines the rules for organizing and interpreting the data in Modbus?
Modbus messaging structure
What does Modbus support communication to and from?
Multiple devices connected to the same cable or Ethernet network
What is a typical use of Modbus in SCADA systems?
Connecting a system supervisory computer with an RTU
What is the reserved system port for accessing Modbus on the TCP/IP stack?
Port 502
What is the name for a single physical output in Modbus?
Coil
What is the Modbus function code used for reading an input/output port?
Not specified in the text
Which type of Modbus memory object consists of digital inputs?
Input coils
What is the address type for analog outputs in Modbus?
4xxxxx
How many extra bytes does the M-BAP header add at the beginning of a Modbus TCP transmission?
Seven
What is the purpose of the Modbus Application Protocol (M-BAP) header?
For Modbus application with additional bytes
What type of protocol is Modbus?
Request and reply protocol
What does an ADU consist of in Modbus?
A PDU
What is the function of Modbus commands?
Instruct a Modbus device to change register values
What is the Modbus address range for devices that can respond to commands?
1 to 247
What is the Modbus address type for Boolean data type input coils?
1xxxxx
Test your knowledge of Modbus TCP protocol and its applications in client-server communication and PLCs. Explore its use in establishing communication between intelligent devices and the reserved port 502 for Modbus TCP.
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