MERRICK Genetix - Use LRC

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• Modbus RTU
• Modbus ASCII
• Modbus TCP
Selecting this parameter from the Numeric Data menu will bring up the Numeric
Data Entry screen that will allow you to enter the desired register number to be
tagged. This should be done after selecting the correct protocol (see above).
Note: In order to select the register number corresponding to the data you want
to access, you will need a register list for your GCM application. Contact the
Merrick Customer Support department for assistance.
Register Tag 2
See Register Tag 1, above.
Register Tag 3
See Register Tag 1, above.
Register Tag 4
See Register Tag 1, above.
Register Tag 5
See Register Tag 1, above.
Use LRC
If DF-1 is the selected protocol, you have the option of using either LRC
(Longitudinal Redundancy Check) or CRC (Cyclic Redundancy Check) error
checking. CRC is the most common, and is the default. Some older PLC’s can
only accommodate LRC, however.
If you are using an Allen-Bradley DNI (DeviceNet Interface), this parameter
should be set to CRC.
Selecting this parameter from the Numeric Data menu will bring up a screen
that will allow you to select either CRC or LRC error checking. This should be
done after selecting the correct protocol (see above).