11 TROUBLESHOOTING

Special Relay List

MELSEC-Q

(10)For redundant systems (Host system CPU information 1) for Q4AR only SM1510 to SM1599 are only valid for redundant systems.

All off for standalone systems.

Number

Name

 

Meaning

 

 

 

Explanation

Set by

ACPU

 

Applicable

 

 

 

 

(When Set)

M9

 

CPU

 

 

 

 

 

 

 

 

 

 

SM1500

Hold mode

OFF: No-hold

• Specifies whether or not to hold the output value when a

U

New

 

 

ON

: Hold

range over occurs for the S.IN instruction range check.

 

 

 

 

 

 

 

 

SM1501

Hold mode

OFF: No-hold

• Specifies whether or not the output value is held when a

U

New

 

 

ON

: Hold

range over occurs for the S.OUT instruction range check.

 

 

 

 

 

 

 

 

 

 

OFF: Redundant

 

 

 

 

 

 

 

 

 

 

 

 

system backup

 

 

 

 

 

 

 

 

 

 

 

 

mode,

 

 

 

 

 

 

 

 

 

SM1510

Operation mode

 

independent

• Turns on when the operating mode is redundant system

S

New

 

 

 

system

separate.

 

 

 

(Each END)

 

 

 

 

 

 

 

 

 

 

 

 

 

ON : Redundant

 

 

 

 

 

 

 

 

 

 

 

 

system

 

 

 

 

 

 

 

 

 

 

 

 

separate mode

 

 

 

 

 

 

 

 

 

 

 

OFF: System A fixed

 

 

 

 

 

 

 

 

 

 

Start mode when

 

mode

• Turns on when the start mode for a redundant system

 

 

 

 

SM1511

ON

: Previous control

when the power is turned on is the previous control system

S (Initial)

New

 

 

power supply is on

 

 

 

 

 

system latch

latch mode.

 

 

 

 

 

 

 

 

 

 

mode

 

 

 

 

 

 

 

 

 

SM1512

Start mode when CPU

OFF: Initial start

• Turns on when the CPU operation mode is hot start when

S (Initial)

New

 

 

 

is started

ON

: Hot start

the redundant system is started up.

 

 

 

 

SM1513

Operation status when

OFF: Initial start

• Turns on when the CPU operation mode is hot start when

S (Initial)

New

 

 

 

CPU is started

ON

: Hot start

the redundant system is actually start up.

 

 

 

 

SM1514

Operation mode when

OFF: Initial start

• Turns on when the operation is hot start when the CPU

S (Initial)

New

 

 

 

CPU is switched

ON

: Hot start

operation is switched for a redundant system.

 

 

 

 

SM1515

Output hold mode

OFF: Output reset

• Turns on when the output mode during a stop error is

S

New

 

 

ON

: Output hold

output hold.

 

 

 

(Each END)

 

 

 

 

 

 

 

 

 

 

SM1516

Operation system

OFF: Control system

• Turns on when the CPU operation system status is the

S (Status

New

 

 

 

status

ON

: Standby system

standby system.

 

 

change)

 

 

 

 

 

OFF: Power supply

 

 

 

 

 

 

 

 

 

 

 

 

on startup

• Turns on when the CPU is started up by the operation

S (Status

 

 

 

SM1517

CPU startup status

ON

: Operation

system switch.

 

 

New

 

 

 

 

change) /U

 

 

 

 

 

system switch

• Reset using the user program.

 

 

 

 

 

 

 

 

 

 

 

 

 

starup

 

 

 

 

 

 

 

 

Q4AR

SM1518

Tracking execution

OFF: Batch operation

• When turned off when the tracking memory is in use during

U

New

 

 

 

mode

END, standby is executed until execution is possible.

 

 

 

mode

ON : Carryover mode

• When turned on when the tracking memory is being used-

 

 

 

 

 

 

 

 

during END, this is repeatedly executed until the next END

 

 

 

 

SM1520

 

 

 

 

SM1520

Block 1

 

 

 

 

 

 

SM1521

 

 

 

 

SM1521

Block 2

 

 

 

 

 

 

SM1522

 

 

 

 

SM1522

Block 3

 

 

 

 

 

 

SM1523

 

 

 

 

SM1523

Block 4

 

 

 

 

 

 

SM1524

 

 

 

 

SM1524

Block 5

 

 

 

 

 

 

SM1525

 

 

 

 

SM1525

Block 6

 

 

 

 

 

 

SM1526

 

 

 

 

SM1526

Block 7

 

 

 

 

 

 

SM1527

 

 

 

 

SM1527

Block 8

 

 

 

 

 

 

SM1528

 

 

 

 

SM1528

Block 9

 

 

 

 

 

 

SM1529

 

 

 

 

SM1529

Block 10

 

 

 

 

 

 

SM1530

 

 

 

 

SM1530

Block 11

 

 

 

 

 

 

SM1531

Data tracking

 

 

 

SM1531

Block 12

• Specified the blocks to trigger

 

 

 

 

SM1532

 

 

 

SM1532

Block 13

 

 

 

 

 

transmission link

OFF: No trigger

 

 

when the data is transmitted by

U

New

 

 

SM1533

ON

: Trigger

 

SM1533

Block 14

 

the data tracking instruction

 

 

specification

 

 

 

 

 

 

SM1534

 

 

 

SM1534

Block 15

 

S. TRUCK.

 

 

 

 

 

 

 

 

 

 

 

 

 

SM1535

 

 

 

 

SM1535

Block 16

 

 

 

 

 

 

SM1536

 

 

 

 

SM1536

Block 17

 

 

 

 

 

 

SM1537

 

 

 

 

SM1537

Block 18

 

 

 

 

 

 

SM1538

 

 

 

 

SM1538

Block 19

 

 

 

 

 

 

SM1539

 

 

 

 

SM1539

Block 20

 

 

 

 

 

 

SM1540

 

 

 

 

SM1540

Block 21

 

 

 

 

 

 

SM1541

 

 

 

 

SM1541

Block 22

 

 

 

 

 

 

SM1542

 

 

 

 

SM1542

Block 23

 

 

 

 

 

 

SM1543

 

 

 

 

SM1543

Block 24

 

 

 

 

 

 

SM1544

 

 

 

 

SM1544

Block 25

 

 

 

 

 

 

SM1545

 

 

 

 

SM1545

Block 26

 

 

 

 

 

 

1 Host system CPU information is stored.

 

 

 

 

 

 

 

 

 

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