M550/M560/M570 Set Calibration Pass Code
Set the Calibration Pass Code in the node.This enables other functions to alter the node's calibration data.
Use this function with data set to zero to clear (disable) the Calibration Pass Code.
N.B. The pass code remains in its current state until one of the following -
1) The M550/560/570 is re-booted
2) The Calibration Pass Code is cleared
3) The General Pass Code is cleared
4) There has been no 4X register write functions for 6 minutes.

This function requires the General Pass Code to be valid.

Sample Coding
Slave Address = 1
Writing To 4X Registers - code 16 (10 hex)

Message Packet To SLAVE
01 10 00 44 00 02 04 46 8B DA 00 C8 6E
N.B. Code 46 8B DA 00 = 17901

Response Packet From SLAVE
01 10 00 44 00 02 01 DD