Mitsubishi Electronics manual 197

11 TROUBLESHOOTING

MELSEC-Q

Special Register List (Continued)

								Set by	Corresponding	Corresponding
Number	Name	Meaning			Explanation			(When	ACPU
										CPU
								set)	D9
			• Indicates memory card B models installed
			B15	B8 B7	B4 B3	B0
			0<----------- >0			Drive 1	0: Does not exist			Q2A (S1)
SD620	Memory card	Memory card						S (Initial)	New	Q3A
	B models	B models				(RAM) model	1: SRAM			Q4A
						Drive 2	0: Does not exist			Q4AR
							2: E2PROM
						(ROM) model
							3: Flash ROM
			• Drive 3 capacity is stored in 1 kbyte units.					S (Initial)	New	QCPU
	Drive 3	Drive 3								Q2A (S1)
SD622	(RAM)									Q3A
		capacity	• Drive 3 capacity is stored in 1 kbyte units					S (Initial)	New
	capacity									Q4A
										Q4AR
			• Drive 4 capacity is stored in 1 kbyte units.					S (Initial)	New	QCPU
	Drive 4	Drive 4								Q2A (S1)
SD623	(ROM)									Q3A
		capacity	• Drive 4 capacity is stored in 1 kbyte units					S (Initial)	New
	capacity									Q4A
										Q4AR

•The conditions for usage for drive 3/4 are stored as bit patterns. (In use when ON)

•The significance of these bit patterns is indicated below:

B0:

Boot operation (QBT)

B8:

Not used

Drive 3/4 use

Drive 3/4 use

B1:

Parameters (QPA)

B9:

CPU fault history (QFD)

S (Status

B2:

Device comments (QCD)

B10: SFC trace (QTS)

New

QCPU

conditions

conditions

change)

B3:

Device initial value (QDI)

B11: Local device (QDL)

B4:

File R (QDR)

B12: Not used

B5:

Trace (QTS)

B13: Not used

B6:

Not used

B14: Not used

SD624

B7:

Not used

B15: Not used

• The use conditions for memory card B are stored as bit patterns

(In use when ON)

• The significance of these bit patterns is indicated below:

B0:

Boot operation (QBT)

B8:

Simulation data (QDS)

Q2A (S1)

Memory card

Memory card

B1:

Parameters (QPA)

B9:

CPU fault history (QFD)

S (Status

Q3A

B use

B use

B2:

Device comments (QCD)

B10: SFC trace (QTS)

New

change)

Q4A

conditions

conditions

B3:

Device initial value (QDI)

B11: Local device (QDL)

Q4AR

B4:

File R (QDR)

B12: Not used

B5:

Sampling trace (QTS)

B13: Not used

B6:

Status latch (QTL)

B14: Not used

B7:

Program trace (QTP)

B15: Not used

SD640

File register

Drive number: • Stores drive number being used by file register

S (Initial)

New

drive

SD641

• Stores file register file name (with extension) selected at parameters

SD642

or by use of QDRSET instruction as ASCII code.

SD643

B15

to

B8

B7

to

B0

SD641

Second character

First character

SD644

File register

File register

SD642

Fourth character

Third character

S (Initial)

New

SD645

SD643

Sixth character

Fifth character

file name

file name

SD644

Eighth character

Seventh character

SD645

First character of extension

2EH(.)

SD646

SD646

Third character of extension

Second character of

extension

SD647

File register

File register

• Stores the data capacity of the currently selected file register in 1 k

S (Status

New

capacity

capacity

word units.

change)

SD648

File register

File register

• Stores the currently selected file register block number.

S (Status

D9035

block number

block number

change)

SD650

Comment

Comment

• Stores the comment drive number selected at the parameters or by

S (Status

New

drive

drive number

the QCDSET instruction.

change)

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