Mitsubishi Electronics manual 190

11 TROUBLESHOOTING

MELSEC-Q

Special Register List (Continued)

Number

Name

Meaning

Explanation

Set by

Corresponding

Corresponding

(When set)

ACPU

CPU

D9

SD220

• LED display ASCII data (16 characters) stored here.

B15

to

B8

B7

to

B0

SD221

SD220

15th character from the right

16th character from the right

SD222

SD221

13th character from the right

14th character from the right

SD223

LED display

Display indicator

SD222

11th character from the right

12th character from the right

S (When

New

SD223

9th character from the right

10th character from the right

SD224

data

data

changed)

SD224

7th character from the right

8th character from the right

SD225

SD225

5th character from the right

6th character from the right

SD226

SD226

3rd character from the right

4th character from the right

SD227

1st character from the right

2nd character from the right

SD227

SD240

Base mode

0: Automatic mode

• Stores the base mode.

S (Initial)

New

1: Detail mode

No. of

0: Main base only

1 to 7: No. of

• Stores the maximum number of the extension bases unit being

SD241

extension

S (Initial)

New

extension

installed.

bases

bases

Base type

B7

B2

B1

B0

Fixed to 0

to

differentiation

0: QA

B is

Main base unit

QCPU

A/Q base

installed

1st expansion

SD242

base

S (Initial)

New

Remote

differentiation

(A mode)

2nd expansion

base

When no expansion

1: Q

B is

to

base is installed, the

installed

7th expansion

value is fixed to 0.

(Q mode)

base

B15

B12 B11

B8 B7

B4 B3

B0

SD243

No. of base

SD243

Expansion 3

Expansion 2

Expansion 1

Main

No. of base slots

SD244

Expansion 7

Expansion 6

Expansion 5

Expansion 4

S (Initial)

New

slots

SD244

• As shown above, each area stores the number of slots being

installed.

Loaded

Loaded maximum

• When SM250 goes from OFF to ON, the upper 2 digits of the final

S

SD250

(Request

New

+Rem

maximum I/O

I/O No.

I/O number plus 1 of the modules loaded are stored as BIN values.

END)

Head I/O

Head I/O No. for

Q2A (S1)

• Stores the upper two digits of the first I/O number of an I/O module

Q3A

SD251

number for

module

U

D9094

that is removed/replaced in the online status.(default value : 100H)

Q4A

replacement

replacement

Q4AR

SD253

RS-422 baud

RS-422 baud rate

• Stores baud rate of RS-422.

2: 38.4kbps

S (When

New

QnA

rate

0: 9600bps

1: 19.2kbps

changed)

SD254

Number of

• Indicates the number of modules installed on MELSECNET/10 (H).

modules installed

SD255

I/O No.

• MELSECNET/10 (H) I/O number of first module installed

SD256

Network

• MELSECNET/10 (H) network number of first module installed

No.

SD257

Informa-

Group

• MELSECNET/10 (H) group number of first module installed

tion from

number

SD258

1st

Station

• MELSECNET/10 (H) station number of first module installed

module

No.

MELSECNET

Standby

• In the case of standby stations, the module number of the standby

S (Initial)

New

SD259

/10 (H)

informa-

information

tion

station is stored. (1 to 4)

SD260

Information from

to

• Configuration is identical to that for the first module.

2nd module

SD264

SD265

Information from

to

• Configuration is identical to that for the first module.

3rd module

SD269

SD270

Information from

to

• Configuration is identical to that for the first module.

4th module

SD274

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