Function 08 Diagnostics | Siemens UL1066, UL 489 specification

Communication-capable Circuit Breakers

WL Circuit Breaker

Function 08: Diagnostics

Function	This function provides a method for checking the communication between the master and a COM16 slave.
	COM16 slaves support the diagnostic sub-functions Return Query Data (0000 hex) and Clear Event Counter
	(000A hex).

Diagnostic Code	0000 hex: Echoes the test data sent by the master.
	000A hex: Clears the COM16 slave’s communications counters. (The data field for both Request and Reply is set
	to 0000 hex.)
	If any other value is specified, an Exception Code of 03 (Invalid Data Value) will be returned.

Function 11: Get Communication Event Counter

Function	Returns a status word and an event count from the COM16 slave's communications event counter. The event
	counter is incremented once for each successful message completion. It is not incremented for exception
	responses or Fetch Communication Event Counter commands. The event counter can be reset by means of the
	Diagnostics function (code 08), with the sub-function Clear Counters (code 000A hex).
	The normal response contains a two-byte status word, and a two-byte event count. The status word will be all
	ones (FFFF hex) if the COM16 slave is still processing a previously issued program command (a busy condition
	exists). Otherwise, the status word will be all zeros.

Function 12: Get Communication Event Log

Function	Returns a status word, event count, message count and a field of event bytes from the slave. The status word
	and event count are identical to that returned by Function 11 (Fetch Communications Event Counter). The
	message counter is incremented once for each message processed by the slave. The event bytes field contains 64
	bytes, with each byte corresponding to the status of one MODBUS send or receive operation for the slave. The
	slave enters the events into the field in chronological order. The Byte 1 is the most recent event. Each new byte
	flushes the oldest byte from the field.
	The normal response contains a two-byte Status field, a two-byte Event Count field, a two-byte Message Count
	field and a 64 byte Event Byte field. The Byte Count contains the total number of bytes in these four fields.

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WL MODBUS Communication and Electronic Accessories • January 2005

UL 489, UL1066 specifications

Siemens UL1066 and UL489 are essential components in the landscape of electrical equipment, specifically in circuit protection and control. These standards ensure reliability, safety, and efficiency in various applications, including industrial, commercial, and residential settings.

The Siemens UL1066 is primarily focused on disconnect switches. These devices are designed to isolate electrical circuits, ensuring the safety of both personnel and equipment during maintenance or in case of faults. One of the key features of UL1066 disconnect switches is their high breaking capacity, enabling them to handle significant fault currents without failure. This characteristic is crucial in protecting downstream equipment from damage caused by short circuits. The UL1066 switches are also known for their robust construction, often featuring a metal enclosure that enhances durability and environmental resistance. Additionally, these switches can be operated manually or remotely, offering flexibility in operation and control.

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Both UL1066 and UL489 products are constructed with advanced technologies, such as thermal-magnetic or electronic trip mechanisms in UL489 devices, ensuring precise and timely interruption of fault currents. These technologies promote energy efficiency and stability within electrical systems. In addition, many of these devices are equipped with indication features, providing clear visual status cues for quick assessment in emergency situations.

In terms of characteristics, both UL1066 and UL489 devices adhere to rigorous testing and certification processes to meet UL standards. This compliance assures users of their performance and reliability. Furthermore, the devices are designed to accommodate a wide range of operating temperatures and environmental conditions, making them versatile choices for various applications.

In summary, Siemens UL1066 and UL489 devices are paramount in ensuring safety and efficiency in electrical circuits. Their advanced features and robust construction make them indispensable in protecting both personnel and equipment in an array of industrial and commercial applications.

Siemens UL1066, UL 489 Function 08 Diagnostics, Function 11 Get Communication Event Counter

Models: UL 489 UL1066