YASKAWA G7 User Manual

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4: Send a message from the controller to the G7 drive.
4.1: Connect an oscilloscope between the G7 drive’s R+ and R- terminals for RS-422/RS-485 4-wire networks or between
terminals R+/S+ and R-/S- for RS-485 2-wire networks.
4.1.1: Verify that the message pulse train exists and contains the correct number of pulses. Refer to the chapter
Message Formats for information on the message contents.
4.1.2: Verify that the signal levels adhere to the RS-422/RS-485 standard.
4.2: Insert a data analyzer in the RS-422/RS-485 circuit and capture the message sent by the controller in a hexadecimal
format. Record the command message below.
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4.3: Verify that the contents of the message adhere to the Modbus format as described previously.
4.3.1: Verify that the node address is valid.
4.3.2: Verify that the function code is valid.
4.3.3: Verify that the register address is valid.
4.3.4: Verify that the number of data bytes is valid.
4.3.5: Verify that the CRC is correctly calculated.
4.3.6: Verify that the message requires a response.

YASKAWA G7 Specifications

General

Type	DC Drive
Enclosure Rating	IP20
Overload Capacity	150% for 60 seconds
Protection Functions	Overcurrent, Overvoltage, Undervoltage, Overtemperature, Short Circuit
Communication Interface	RS-485
Humidity	5 to 95% (non-condensing)
Storage Temperature	-20°C to 60°C (-4°F to 140°F)