Serial Communication Programmer Reference Guide
10 810400 Reference Guide Powermax65/85/105 SYNC
Error response message frame format
The plasma power supply sends an error response message to the CNC when it detects an error in
the request data and when an error occurs during processing of the request.
The format of the error response message is similar to the request and response message format,
with the following differences.
Example request and response message
The following is a request for the 4 most recent faults for the installed cartridge:
Segment Description
Function In an error response message: The MSB of the function code is set to 1. This makes
the function code value 80 hexadecimals higher than the value would be for a normal
response. This identifies to the CNC that this is an error response message.
For example, if the request message contained the Read Register function code of 04,
the error response message would contain 84 in the Function segment of the message.
Data In an error response message: The Data segment of the message contains an
exception code that identifies the reason for the error.
For example, if the function code in the request message is invalid for the plasma power
supply, the Data segment of the error response message contains the 01 exception code
(Illegal Function).
Segment Value Description
Start : Start of message
Node Address 01 Plasma power supply node address
Function 04 Read Registers
Data 3044 First register address (0x3044)
0004 Quantity of registers to read (0x0004 = 4):
• 0x3044 (fault log 0)
• 0x3045 (fault log 1)
• 0x3046 (fault log 2)
• 0x3047 (fault log 3)
LRC 83 Checksum
End <CR><LF> End of message
:01043044000483<CR><LF>
Start Node Address Function Data LRC End
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