Command reference

You can control the main functions from external equipment such as personal computer using the PC/EXT CTL terminals. The following sections explain the interface.

Interface Condition

 

• RS-232C

 

• Baud rate -------------------------

9600 bps

• Data length -----------------------

8 bits

• Parity -------------------------------

Odd parity

• Stop bit ----------------------------

1 bit

• Communications mode --------

Full duplex

 

 

 

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Control Data Format

 

8bit 8bit

8bit

8bit 8bit 8bit 8bit

8bit

 

 

Data

Check Sum

 

 

Data length

 

 

 

Command 2

 

 

UNIT ID

 

Command 1

 

Command 1 ........

Code based on the command system

 

UNIT ID ...............

Code allocated to each equipment (Allocate 80H to the

 

XP29 Xtra/XM29 Xtra)

 

Command 2 .........

Code allocated to the main functions of the XP29 Xtra/XM29

 

Xtra

 

 

Data Length ........

Number of bytes of the data that is transmitted

Data ....................

Data

transmitted

 

Check Sum .........

Lower eight digits of sum total of the first byte to the byte

 

immediately before the last.

 

Command Communication Sequence

When external equipment such as a personal computer gives the command to the XP29 Xtra/XM29 Xtra, the XP29 Xtra/XM29 Xtra returns an ACK. So make sure that the external equipment receives this ACK.

Command sending/receiving sequence

Command

External equipment

(PC)

XP29 Xtra/XM29 Xtra

ACK

The XP29 Xtra/XM29 Xtra returns an ACK if it has received the command correctly.

If it has not received the command correctly due to data error, it will return nothing. Therefore, when the external equipment send a command, make sure that it received the ACK.

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