Melec C-875, Инструкция по эксплуатации

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6-36.PORT SELECT Command
(1) ADDRESS COUNTER PORT SELECT Command
COMMAND……… F9 Function : Switches the DRIVE DATA1, 2 and 3 PORTs to the special port
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for reading count data on the ADDRESS COUNTER.
(2) DFL COUNTER PORT SELECT Command
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COMMAND……… FA
Function : Switches the DRIVE DATA1, 2 and 3 PORTs to the special port
for reading count data on the DIFFERENTIAL COUNTER.
(3) PULSE COUNTER PORT SELECT Command
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COMMAND……… FC
Function : Switches the DRIVE DATA1, 2 and 3 PORTs to the special port
for reading count data on the PULSE COUNTER.
(4) SPEED PORT SELECT Command
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COMMAND……… FD
Function : Switches the DRIVE DATA1, 2 and 3 PORTs to the special port
for reading speed data of output pulse.
These commands are used for switching data to be read from the DRIVE DATA1, 2 and 3 PORTs.
There is no specified command execution sequence. however do not execute this command less than
4 μS after another command is executed.
Desired data will be provided from the DRIVE DATA1, 2 and 3 PORTs within 200ns from execution of a command.
Once executed, each port select command is valid until another port select command is executed.
At POWER ON/RESET, the DRIVE DATA1, 2 and 3 PORTs are set as the special port for reading count data on
the PULSE COUNTER.
If one of the following commands is written, the DRIVE DATA1, 2 and 3 PORTs temporarily output data
required by the command, then restore once selected the port function.
Reading the DRIVE DATA3 PORT
restores them the preceding function.
Thus, whenever one of the following commands has been executed, you must read the DRIVE DATA3 PORT.
ADDRESS READ, SET DATA READ, ERROR STATUS READ and SERIAL INDEX CHECK (applied function).
6-37.SLOW STOP Command
COMMAND……… FE Function : Puts DRIVE into a slow stop.
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When DRIVE is of constant speed, this command puts it into
a fast stop.
Regarding the execution sequence, there is no special stipulation.
However, since this command stops DRIVE, it is ignored when it is written during BUSY＝0.
This command can function only at DRIVE＝1 but not at DRIVE＝0.
6-38.FAST STOP Command
COMMAND……… FF Function : Puts DRIVE into a fast stop.
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Regarding the execution sequence, there is no special stipulation.
However, since this command stops DRIVE, it is ignored when it is written during BUSY＝0.
This command can function only at DRIVE＝1 but not at DRIVE＝0.