CN8240 & CN8260 Series Communications & Options

Digital

Communications Option

Request Data Fields:

A 10-character ASCII representation of a numeric value

 

specifying what to calibrate.

 

0

- Thermocouple

 

1

- RTD, Resistive Thermal Device

 

2

- Linear

 

3

- RAS, Remote Analog Setpoint

Response Data Field:

Ignored.

Command:

Perform Process High Calibration

Parameter #:

03

Description:

Performs a High Calibration. The data field in the request

 

message specifies the process. Make sure the prerequisite

 

for the calibration is satisfied before issuing a calibration

 

command. For instance, the RTD calibration command must

 

only be used when the input sensor type is chosen as RTD

 

or RTD w/ Decimal.

Request Data Field:

A 10-character ASCII representation of a numeric value

 

specifying what to calibrate.

 

0

- Thermocouple

 

1

- RTD, Resistive Thermal Device

 

2

- Linear

 

3

- RAS, Remote Analog Setpoint

Command:

Retrieve Display

Parameter #:

05

Description:

Retrieves the string currently displayed on the slave’s display.

 

The data field in the request message specifies which display

 

and the data field in the response message contains the string.

Request Data Field:

A 10 character ASCII representation of a numeric value

 

specifying which display to retrieve data from.

 

0

- Lower Display

 

1

- Upper Display

Response Data Field:

The ASCII string.

Command:

Clear Latched Alarms

Parameter #:

10

Description:

Clear all latched alarms.

Request Data Field:

Ignored.

Response Data Field:

Ignored.

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Omega Engineering CN8260, CN8240 manual Request Data Fields, Command Retrieve Display Parameter # Description