IAI America TTA - Manual (Page 21)

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4-3-7.
Output Port Query (20CH)
Function: Query output ports.
Data name Data range (value)
Data size
[bytes]
Cumulative bytes
[bytes]
Endian Sign extension
Unit Description Remarks
Big Little Yes No
Command
Header '!' 1 1  
Station 'XX(h)' 2 3  
Message ID '20C(h)' 3 6  
Query start port
number
'XXXX(h)' 4 10  
Be sure to specify “Category head port
number + Multiple of 8.”
Number of query
ports
'XXXX(h)' 4 14   The number of ports will be limited
based on the send/receive buffers.
SC 'XX(h)' 2 16  
CR 0Dh 1 17  
LF 0Ah 1 18  
Normal response
Header '#' 1 1  
Station 'XX(h)' 2 3  
Message ID '20C(h)' 3 6  
Response start port
number
'XXXX(h)' 4 10  
Number of response
ports
'XXXX(h)' 4 14   The number of ports will be limited
based on the send/receive buffers.
Output port data (*1) 'XX(h)' 2 16   8 bits from the head output port
Remaining output
port data
Data indicated by *1
for the number of
remaining data
MAX
16382
MAX
16398
  Remaining output port data = 2 bytes x
(Max 8192 – 1) = 16382 bytes
SC 'XX(h)' 2
MAX
16400
 
CR 0Dh 1
MAX
16401
 
LF 0Ah 1
MAX
16402
 
Error
respon
se
Error response
format Refer to the error
response format.
10 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.