IAI America TTA - Manual (Page 15)

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4-2. Error Response
If, for some reason, the slave station (controller) cannot execute the command from the master station (host) that has been
received as a normal command by the slave station (controller), an error response will be sent to the master station (host). Each
error response stores an error number, so identify the cause of failed command execution based on the error number and take
an appropriate action. Refer to 4-3-1, “Error Response,” for details on the error response format.
4-3. Message Details
The maximum cumulative data size in the message map only indicates the maximum data size allowable by the format structure.
The actual size of transmittable messages will be limited by the sizes of the controller’s receive buffer and send buffer.
* The maximum receivable size and maximum transmittable size of the controller are as follows:
Controller Receivable size Transmittable size
X-SEL(J/K/KE/KT/KET/JX/KX/KTX),TT 1023 bytes 1024 bytes
TTA, X-SEL(P/Q/PCT/QCT/PX/QX/R/S/RX/SX/RXD/SXD),
SSEL/ASEL/PSEL 2051 bytes 2048 bytes
4-3-1. Error
Response
Function: Notify the content of an error that occurred with respect to a command.
Data name Data range (value)
Data size
[bytes]
Cumulative
bytes [bytes]
Endian Sign extension
Unit Description Remarks
Big Little Yes No
Error
response
Header '&' 1 1  
Station 'XX(h)' 2 3  
Error code 'XXX(h)' 3 6   Indicate the error type.
SC 'XX(h)' 2 8  
CR 0Dh 1 9  
LF 0Ah 1 10  
(Note 1) Add H (or h) at the end of each data expressed in hexadecimal notation. If there is no H or h at the end, the data is considered a decimal.
(Note 2) Data enclosed in single quotation marks indicates an ASCII code. Data is a hexadecimal ASCII code if (h) is added before the closing quotation mark, or a decimal ASCII code if (d) is
added before the closing quotation mark.