10 TROUBLESHOOTING

10.1.6 How to read the current operation status

MELSEC-Q

This section explains how to read the current operation status of the Q series C24. When GX Configurator-SC is used, check the status in the "Transmission control and others monitor/test" screen (see Section 8.6.3).

REMARK

The status of the switch settings by GX Developer can be checked by performing read operations as described in Section 10.1.5.

Refer to Section 4.5 for the switch settings.

(1) Operation mode status storage area

The current operation status of the Q series C24 is stored into the following buffer memory areas.

1) Station No. storage area (address: 24FH)

b15

to

b0

Buffer memory address 24FH

0 to 31

(Station No.)

2) Communication protocol status storage area (addresses: 252H and 262H)

 

b15

to

b0

Buffer memory address 252H

1 to 7

 

(Information on the CH1 side)

 

 

 

 

(Information on the CH2 side)

262H

1 to 7

 

Mode number currently operating

Buffer memory address 253H 263H

3) Transmission status storage area (address : 253H, 263H)

b15 b14 b13 b12 b11 b10

b9

b8

b7

b6

b5

b4

b3

b2

b1

b0

0

0

0

0

1/0

1/0

1/0

1/0

1/0

1/0

1/0

1/0

1/0

1/0

1/0

1/0 (Information on the CH1 side)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

0

0

0

0

1/0

1/0

1/0

1/0

1/0

1/0

1/0

1/0

1/0

1/0

1/0

1/0 (Information on the CH2 side)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Communication rate setting

Operation setting

 

Data bit setting

 

Parity bit setting

 

Even/odd parity setting

 

Stop bit setting

 

Sum check code setting

 

Write during RUN setting

 

Setting modification allow/prohibit

10 - 13

10 - 13