
B-63322EN-1/01 4. PROTOCOL A
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4.4
COMMAND
4.4.1
Command Table
Commands used in the protocol A are described below:
Origin station R: Remote buffer H: Hoast computer
Command
Origin
station
Functions Data part
Executed command
at CNC side
R Initialization command
It is used to command the initialization of host.
Meaningless SYNSYN
H Response of SYN
Response when the initialization does not end yet
Initialization command
It is command to initialize the remote buffer.
Meaningless
R Notice of initialization end
The host should respond the RDY in the case of end
of initialization or the SYN when the initialization has
not ended.
Meaningless RDY, SYN
RDY
H Notice of initialization end
It is used to notice that the initialization of host has
ended.
Meaningless
RST R Notice of CNC reset
Immediately after the CNC is reset, transmit this
command when it is possible to transmit signal.
Meaningless ARS
ARS H Response corresponding to the RST Meaningless
ALM R Notice of CNC alarm occurrence
When an alarm occurs in CNC, transmit this
command when it is possible to transmit immediately
after that.
Meaningless AAL
AAL H Response corresponding to the ALM Meaningless
SAT R Notice of remote buffer status
It is used to notice the status of remote buffer by
transmitting it when there is no data to be especially
transmitted while the Tp sec has passed after
receiving the command.
Status SET......... Normal
CLB
RDI
SDO
SYN
SET H Response corresponding to the SAT
It is used to modify the setting parameter of remote
buffer by specifying the data part.
Modification
parameter
GTD R Transmit command of NC data
Transmit this command when the space of remote
buffer exceeds Nb bytes of parameter setting value
in the remote operation status.
Meaningless DAT ........ Normal
EOB........ End
WAT ....... Busy
RDI
SDO
DAT H Response corresponding to the GTD
Transmit this command with the NC data.
NC data
WAT H Response corresponding tot he GTD
Transmit this command if the NC data cannot be
transmitted within To when the GTD has been
received.
The GTD is transmitted again by the remote buffer
after a parameter setting time of Tw.
Meaningless