Omron CJ1W-DRM21 CPU Unit Status Read Service Code 40 Hex, Class ID command Always 002F Hex

Receiving Explicit Messages Section 6-5

CPU Unit Status Read (Service Code: 40 Hex)

This PLC Object service reads status details (operation status, operating mode, fatal and non-fatal errors, etc.) from the CPU Unit.

Command Block

Class ID

Service Code

Destination node address

Response Block

Instance ID

	Service Code
		Detailed status
	Destination
	node address
	No. of bytes
	received
Parameters	Destination node address (command): The node address of the CS/CJ-
	series DeviceNet Unit from which to read data, specified in 1-byte (2 digit)
	hexadecimal.
	Service code (command, response): 40 Hex is specified for commands. For
	responses, the highest bit will turn ON and C0 Hex will be returned.
	Class ID (command): Always 002F Hex.
	Instance ID (command): Always 0000 Hex.
	No. of bytes received (response): The number of bytes received from the
	destination node address (remote node) is returned in hexadecimal.
	Destination node address (response): The node address of the CS/CJ-
	series DeviceNet Unit that returned the response is returned in hexadecimal.
	Read data (response): The read data is given in the following table. The data
	is returned after the service code in the order shown in the table (high to low).
	Operation Status
	RUN mode
	Fatal error information (L)
	Fatal error information (H)
	Non-fatal error information (L)
	Non-fatal error information (H)
	Message exists/does not exist (L)
	Message exists/does not exist (H)
	Error code (L)
	Error code (H)
	Error message (16 bytes)

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