APPENDIX

MELSEC-Q

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 Section 3.11 of the Reference Manual and Chapter 10 of 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

Position

Designated value

 

 

 

 

value

 

 

 

 

 

 

 

 

b0

 

OFF

 

Operation setting

 

 

Independent

 

 

 

b1

 

ON

 

Data bit

 

 

8 bits

 

 

 

b2

 

OFF

 

Parity bit

 

 

No

 

 

 

b3

 

OFF

Transmission

Even/odd parity

 

 

Odd

 

 

Switch 1

b4

 

OFF

setting

Stop bit

 

 

1 bit

 

07E2H

 

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

 

CH1

 

 

 

 

 

 

value

 

 

 

 

 

 

 

 

 

 

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

 

 

 

 

 

—

App. - 35

App. - 35