FOR-A VSF-128128, Operation Manual

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8-7-4. Response Commands
(A) Normal receive
The following status command is sent when the operation for the Crosspoint Switching
command is completed normally.
O K CR LF
(ASCII) 4F 4B 0D 0A
The following status command is sent when the operation for the Preset Switching command
is completed normally.
S E T CR LF
(ASCII) 53 45 54 0D 0A
The following status command is sent when the operation for the Status Request command is
completed normally.
S SPACE 0 0 4 CR LF
(ASCII) 53 20 30 30 34 0D 0A
(The above command indicates channel 4 is connected to the status requested output.)
S SPACE 0 0 0 CR LF
(ASCII) 53 20 30 30 30 0D 0A
(The above command indicates no channel is selected for the output.)