Related Models
MELSEC MX Controllers, MELSEC Programmable Controllers, GOT-A900/GOT1000/GOT2000 Series
1 Operating Precautions
When connecting a module with RS-232/USB interface*1 to a computer, please follow the operating instructions of the computer while adhering to the precautions below.
*1 For specific target models, please refer to the content below.
2 Target Models
1.1 When Using the Computer with AC Power Supply
The precautions for using the computer with AC power supply are as follows.
When using a computer with a three-prong power plug or a power plug with a ground wire
It is necessary to use a socket with grounding or ensure that the ground wire is grounded. Additionally, the computer and the programmable controller, GOT should be grounded through a dedicated ground (ground resistance not exceeding 100Ω).
When using a computer with a two-prong power plug without a ground wire
Follow the steps below to connect the module to the computer. Furthermore, it is recommended to power the computer and the programmable controller, GOT from the same power system.
■ When Connecting the Computer
1. Disconnect the computer’s power plug from the AC socket.
2. After confirming that the computer’s power plug has been disconnected from the AC socket, connect the RS-232/USB cable.
3. Insert the computer’s power plug back into the AC socket.
■ When Connecting Extension Cables and GOT Bus Connection Cables
1. Disconnect the power plugs of all computers connected to the target model from the AC socket.
2. After confirming that all computers’ power plugs have been disconnected from the AC socket, connect the extension cables and GOT bus connection cables.
3. Insert the computer’s power plug back into the AC socket.
Precautions
Failure to adhere to the above precautions may result in electric shock or failure of the programmable controller/controller, GOT main unit, bus connection board, and bus connection module.
1.2 When Using the Computer with Battery Power
When using the computer with battery power, it can be used directly.
1.3 Examples of Connections That May Cause Electric Shock or Module Failure
Examples of connections that may cause electric shock or module failure are as follows.
Connection Example 1
*1 When using a desktop computer, the internal power supply of the computer is the corresponding target.
Connection Example 2
*1 When using a desktop computer, the internal power supply of the computer is the corresponding target.
2 Target Models
The models connected via RS-232/USB interface are the targets. The target models that require operational attention when connecting to a computer are as follows.
*1 When connected via bus connection or RS-232 interface to MELSEC-Q series programmable controllers, it is the target.
*2 When connected via RS-232 interface to MELSEC-L series programmable controllers, it is the target.