Yaskawa SMC–4000 - Manual (Page 266)

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SMC–4000 User Manual
Controller Response to Commands
For each valid command entered, the SMC–4000 returns a colon (:). If the SMC–4000 decodes a
command as invalid, it returns a question mark (?).
*Note The SMC–4000 returns a : for valid commands.
*Note The SMC–4000 returns a ? for invalid commands.
For example, if the command bg is sent in lower case, the SMC–4000 will return a ?.
VERY IMPORTANT!
The command Tell Code, TC1, will return the reason for the “?” received for the last invalid command.
There are several coded reasons for receiving a ?. Example codes include unrecognized command (such
as typographical entry or lower case), a command given at improper time, or a command out of range,
such as exceeding maximum speed. A complete listing of all codes is listed in the TC command in the
Command Reference section.
For interrogation instructions such as TP (Tell Position) or TS (Tell Switches) , the SMC–4000 returns the
requested data on the next line followed by a carriage return and line feed. The data returned is in decimal
format.
The format of the returned data can be set using the PF (Position Format) and VF (Variable Format)
command.
:bg <enter> Invalid command (lower case)
? SMC–4000 returns a ?
:TC1 <enter> Tell Code command
1 Unrecognized command Returned response
Tell Position X :TP X <enter>
data returned 0000000000
Tell Position X and Y :TP XY <enter>
data returned 0000000000,0000000000
:PF 4 <enter> Position Format is 4 integers
:TP X <enter> Tell Position
0000 returned data