Cutler-Hammer ELC Serial

6 min

Review the following information for setting up and configuring the Cutler-Hammer ELC Serial driver.

Litmus Edge Compatible Series

To set up and configure this device in Litmus Edge, you will need to do the following:

If the device is configured for Serial access, identify the serial port settings including:

Configure the following parameters when you Connect a Device with this driver. Update default values to the specific setup of your device.

Parameter	Value
Type	Eaton
Driver	Cutler-Hammer ELC Serial
Device File	/dev/ttyS1 (or your serial port)
Baud Rate	Select appropriate baud rate
Data Bits	7 or 8
Parity	None, Odd, or Even
Stop Bits	1 or 2
Station ID	0 (default)
Zero-Based Addressing	Enabled (default)
Response Timeout	2000 (ms)
Maximum Packet Size	512 (bytes)

When you Add a Tag to the connected device, refer to the following register table and tag parameters. Refer to the following additional resources:

Name	Value Types	Access Types	Address Format	Max Address	Description
X	bit	R/O	OOO	255	Discrete Input
Y	bit	R/W	OOO	255	Discrete Output
M	bit	R/W	DDDD	4095	Main Relay
To	bit	R/W	DDD	255	Timer Status
Co	bit	R/W	DDD	255	Counter Status
S	bit	R/W	DDDD	1023	Step Point
T	word, int16, int32, uint32, int64, uint64, float32, float64	R/W	DDD	255	Timer Current Value
T_bit	bit	R/W	DDDdd	25515	Timer Current Value
C	word, int16, int32, uint32, int64, uint64, float32, float64	R/W	DDD	255	Counter Current Value
C_bit	bit	R/W	DDDdd	25515	Counter Current Value
D	word, int16, int32, uint32, int64, uint64, float32, float64, string	R/W	DDDD	9999	Data Register
D_bit	bit	R/W	DDDDdd	999915	Data Register

Name: Select a register name from the drop-down list. The available options depend on the names in the register table.

Value Type: Select a data type from the drop-down list. The available options depend on the register name selected.

Polling Interval: Enter a value in seconds. This determines how often the tag should poll the register for data.

Address: Enter a tag address in decimal format, within the allowed min/max range. Omit the leading zeros. The address format uses D for decimal and O for octal. For bit tags, append the bit address without the bit separator. The lowercase letters in the address format indicate how many digits you should enter in the bit address.

Count: Enter the number of register values to read. A count higher than 1 will generate an array of values from the address value configured and respective subsequent address values.

Length: Available for String Data Registers. Enter the number of characters for tag values.

Tag Formula: Enter a formula for the tag to process the generated data. Two variables are permitted: value (current tag value) and timestamp (current tag UNIX time in milliseconds). The following math functions are available:

Only Publish on Change of Value: Select the checkbox to customize NATS messages to be published only when the value parameter changes to a new one. Change of Value only applies to boolean, numeric (such as int or float), and simple string data types. It does not apply to complex types, such as JSON or array. Poll-once topics will not be affected by Change of Value settings. These topics will still only see a single message.

Meta Data: Metadata summarizes basic information about data. This feature allows you to define key-value pair data for the device output payload later on. It can then be used to find, use, and reuse particular instances of data.

Note: If you use special characters in meta data key names, the special characters are replaced with underscore characters in the payload. This can cause two key names to be combined into one. For example, configuring the key names a**b and a&&b will cause only one key name to be created (a__b).