11 TROUBLESHOOTING

MELSEC-Q

Special Relay List (Continued)

ACPU

Special

Special

 

 

 

Applicable

Special

Relay after

Relay for

Name

Meaning

Details

CPU

Relay

Conversion

Modification

 

 

 

 

 

 

 

M9036

SM1036

 

 

 

Always ON

ON

 

 

 

 

 

• Used as dummy contacts of initialization and application

 

 

 

 

 

OFF

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

instruction in sequence program.

 

 

 

 

 

 

 

 

ON

 

 

 

 

 

• SM1038 and SM1037 are turned on and off without

 

 

M9037

SM1037

 

 

 

Always OFF

 

 

 

 

 

regard to position of key switch on CPU module front.

 

 

 

 

 

OFF

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

SM1038 and SM1039 are under the same condition as

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

M9038

SM1038

 

 

 

ON for 1 scan

ON

 

 

1 scan

RUN status except when the key switch is at STOP

 

 

 

 

 

only after RUN

OFF

 

position, and turned off and on. Switched off if the key

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

switch is in STOP position. SM1038 is on for one scan

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

RUN flag(After

ON

 

 

1 scan

only and SM1039 is off for one scan only if the key switch

 

 

M9039

SM1039

 

 

 

RUN, OFF for 1

OFF

 

is not in STOP position.

 

 

 

 

 

 

 

 

 

 

 

 

scan only)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

M9040

SM1040

SM206

PAUSE enable

OFF: PAUSE disabled

• When RUN key switch is at PAUSE position or remote

 

 

coil

ON : PAUSE enabled

 

 

 

 

 

 

 

pause contact has turned on and if SM204 is on, PAUSE

 

 

 

 

 

 

 

USE status

OFF: PAUSE not in effect

 

 

M9041

SM1041

SM204

mode is set and SM206 is turned on.

 

 

contact

ON

: PAUSE in effect

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

M9042

SM1042

SM203

STOP status

OFF: STOP not in effect

• Switched on when the RUN key switch or RUN/STOP

 

 

contact

ON

: STOP in effect

switch is in STOP position.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

OFF: Sampling trace in

• Turned on upon completion of sampling trace performed

 

 

M9043

SM1043

SM805

Sampling trace

 

 

progress

the number of times preset by parameter after

STRA

 

 

 

completed

ON

: Sampling trace

instruction is executed.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

completed

Reset when

STRAR

instruction is executed.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

• Turning on/off SM803 can execute

 

 

/

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

STRA

STRAR

 

 

 

 

 

 

 

 

OFF

 

ON

 

 

 

instruction.

 

 

 

 

 

 

 

 

 

STRA

 

 

(SM803 is forcibly turned on/off by a peripheral device.)

 

 

M9044

SM1044

SM803

Sampling trace

 

 

 

Same as execution

When switched from OFF to ON:

STRA

instruction

 

 

ON

 

OFF

STRAR

 

When switched from ON to OFF:

STRAR

instruction

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Same as execution

The value stored in SD1044 is used as the condition for

 

 

 

 

 

 

 

 

 

 

 

 

 

 

the sampling trace.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

At scanning, at time → Time (10 ms unit)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

• The SM1015 relay is turned on to reset the WDT when

 

 

M9045

SM1045

 

 

 

Watchdog timer

OFF: Does not reset WDT

the ZCOM instruction and data communication request

 

 

 

 

 

(WDT) reset

ON : Resets WDT

batch processing are executed (used when the scan time

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

exceeds 200 ms).

 

 

M9046

SM1046

SM802

Sampling trace

OFF: Trace not in progress

• Switched on during sampling trace.

 

 

ON

: Trace in progress

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Sampling trace

OFF: Sampling trace

• Sampling trace is not executed unless SM801 is turned

 

 

M9047

SM1047

SM801

 

 

suspended

ON.

 

 

preparations

 

 

 

 

 

 

 

 

 

ON

: Sampling trace started

• Sampling trace is suspended when SM801 goes OFF.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Selection of

OFF: Output until NULL code

• When SM701 is OFF, characters up to NUL (00H) code

 

 

 

 

 

 

 

are output.

 

 

M9049

SM1049

SM701

number of

 

 

encountered

 

 

 

 

• When SM701 is ON, ASCII codes of 16 characters are

 

 

 

 

 

 

 

characters output

ON

: 16 characters output

 

 

 

 

 

 

 

output.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

CHG instruction

OFF: Enabled

• Switched ON to disable the CHG instruction.

 

 

M9051

SM1051

 

 

 

• Switched ON when program transfer is requested.

 

 

 

 

 

execution disable

ON

: Disable

 

 

 

 

 

 

 

Automatically switched OFF when transfer is complete.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

• When SM1052 is ON, the SEG instruction is executed as

 

 

M9052

SM1052

 

 

 

SEG instruction

OFF: 7SEG segment display

an I/O partial refresh instruction.

 

 

 

 

 

switch

ON

: I/O partial refresh

• When SM1052 is OFF, the SEG instruction is executed

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

as a 7-SEG display instruction.

 

 

M9054

SM1054

SM205

STEP RUN flag

OFF: STEP RUN not in effect

• Switched on when the RUN key switch is in STEP RUN

 

 

ON

: STEP RUN in effect

position.

 

QnA

 

 

 

 

 

 

 

M9055

SM1055

SM808

Status latch

OFF: Not completed

• Turned on when status latch is completed. Turned off by

 

 

 

completion flag

ON

: Completed

reset instruction.

 

 

 

 

 

 

 

 

 

M9056

SM1056

 

 

 

Main side P, I set

OFF: Other than when P, I set

• Provides P, I set request after transfer of the other

 

 

 

 

 

request

 

 

being requested

 

 

 

 

 

 

 

ON

: P, I set being requested

program (for example subprogram when main program is

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Sub side P, I set

OFF: Other than when P, I set

being run) is complete during run. Automatically switched

 

 

M9057

SM1057

 

 

 

 

 

being requested

off when P, I setting is complete.

 

 

 

 

 

request

 

 

 

 

 

 

 

 

 

ON

: P, I set being requested

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

M9058

SM1058

 

 

 

Main side P, I set

Momentarily ON at P, I set

• Turned ON once when the P, I set has been completed,

 

 

 

 

 

completion

completion

 

 

 

 

 

 

 

 

 

M9059

SM1059

 

 

 

Sub program P, I

Momentarily ON at P, I set

and then turned OFF again.

 

 

 

 

 

set completion

completion

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

OFF: Other than when P, I set

• Provides P, I set request after transfer of the other

 

 

M9060

SM1060

 

 

 

Sub program 2 P,

program (for example subprogram when main program is

 

 

 

 

 

I set request

 

 

being requested

being run) is complete during run. Automatically switched

 

 

 

 

 

 

 

ON

: P, I set being requested

 

 

 

 

 

 

 

 

off when P, I setting is complete.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

11 - 54

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

11 - 54