APPENDIX

(2) Program example

<Initial setting command>

<Setting of word/byte units designation>

<Setting of on-demand function designation and transmission area designation>

<Setting of receive area designation>

MELSEC-Q

Changes the initial setting command into pulses.

Sets the word/byte units designation to byte.

Transfers the setting value to the word/byte units designation area of the buffer memory.

Initial setting command 2

Abnormal completion of REMTO instruction

Sets 400H to the buffer memory head address for on-demand transmission.

Sets 0H to the buffer memory length for on-demand transmission.

Sets 0C00H to the transmission buffer memory head address.

Sets 400H to the transmission buffer memory length.

Transfers the setting values to the on-demand function designation and transmission area designation areas of the buffer memory.

Initial setting command 3

Abnormal completion of REMTO instruction

Sets 600H to the receive buffer memory head address.

Sets 200H to the receive buffer memory length.

Transfers the setting value to the receive area designation area of the buffer memory.

Initial setting completion

Abnormal completion of REMTO instruction

REMARK

When changing the default values of the following buffer memory areas, refer to above (2) Program example to perform programming.

•DTR/DSR (ER/DR), DC control designation

•DC1/DC3 (Xon/Xoff) code designation

•DC2/DC4 code designation

•CD terminal check designation (for RS-232)

•Communication system designation (for RS-232)

•Simultaneous transmission priority/non-priority designation

•Retransmission time transmission method designation

•Simultaneously transmission data valid/invalid designation

•No-reception monitoring time (timer 0) designation

App. - 47

App. - 47