Mitsubishi Electric QJ71C24N-R4 - Appendix 9.3 When Sending On-Demand Data

App. - 40 App. - 40
MELSEC-Q
APPENDICES
Appendix 9.3 When sending on-demand data
The following program example sends on-demand data using the REMFR/REMTO
instruction and I/O signals.
For the on-demand function, refer to the Reference Manual and the User's Manual
(Application).
(1) Program conditions
The following program sends on-demand data from the CH1 side when the
transmission command (X1022) turns ON.
(a) Devices used
:
• Transmission command ........................................................... X1022
• Transmission command pulse signal ...................................... M10
• On-demand function designation command ........................... M11
• On-demand data transmission flag .......................................... M12
• On-demand execution result acquisition command ................ M13
• LED ON status acquisition command ...................................... M14
• Completion device for REMFR/REMTO instruction ................ M100 to 107
• Normal/abnormal completion flag for REMFR/REMTO
instruction ................................................................................. M200 to 204
• Normal/abnormal completion of on-demand data
transmission ............................................................................. M300, M301
• Transmission data .................................................................... D0, D1
• Buffer memory head address designation for on-demand
function ..................................................................................... D2
• Data length designation for on-demand function .................... D3
• On-demand execution result .................................................... D8
• LED ON status and communication error status on CH1 side
................................................................................................... D9
(b) Intelligent function module switch settings (Refer to Section 4.5.2.)
Switch No.
Bit
Description
Setting
value
Position Designated value
Switch 1
b0 OFF
Transmission
setting
Operation setting Independent
07E2H
b1 ON Data bit 8 bits
b2 OFF Parity bit No
b3 OFF Even/odd parity Odd
b4 OFF Stop bit 1 bit
b5 ON Sum check code Yes
b6 ON Write during RUN Enabled
b7 ON Setting modifications Enabled
b8 to b15 — Communication rate setting 19200bps
Switch 2 — Communication protocol setting MC protocol format 1 0001H
Switch 5 — Station number setting Station 0 0000H
(c) Buffer memory settings used in this example
Address Decimal (Hexadecimal)
Name
Setting
value
CH1
150 (96H) Word/byte units designation Word units
160 (A0H) Buffer memory head address designation for on-demand function designation 0C00H
161 (A1H) Data length designation for on-demand function designation 2
513 (201H) LED ON status and communication error status on CH1 side —
598 (256H) On-demand execution result —