Emerson Copeland CORESENSE, Technical Information

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Mode 9
Discharge temperature
lockout
10
Stand-alone Off Disable Off
Network On Enable On
Table 5: Network mode DIP-switch settings Table 6: High discharge temp. protection DIP-switch
settings
Oil functionality
Self-test mode
11 VFD DIP-switch 12
Disable Off Non VFD Off
Enable On VFD On
Table 7: Oil functionality test DIP Switch settings Table 8: VFD DIP-switch settings
5.3 RTU Transmission mode
The Modbus communication in the CoreSense Diagnostics module uses RTU mode. The default character framing
is an 11-bit character as follows:

1 start bit

8 data bits
 2 stop bits (or if “Even parity” is selected 1 stop bit and 1 parity bit)
A standard 2-byte CRC 16 is used for frame verification.
5.4 Response message timeout
As per the Modbus specification, each device can define its own maximum timeout for the response to be sent to a
request. The maximum timeout for the module is one second.
6 Application layer
The Application layer defines the type and format of the messages that will be sent.
6.1 Available functions
Standard Modbus function codes supported by CoreSense Diagnostics module
Switch no.
Function
code
Function name Registers Access
1 0x04 Read input registers Input registers Read only
2 0x03 Read holding registers Holding registers Read / Write
3 0x06 Write single register Holding registers Read / Write
4 0x10 Write multiple register Holding registers Read / Write
Table 9: Standard Modbus function codes
6.2 Data types
Modbus requires that all multiple byte data be sent in Big Endian format (most significant byte to least significant
byte).
6.3 Functions supported
6.3.1 Coil input status
The module does not support function call 0x2.