11 TROUBLESHOOTING

MELSEC-Q

Error Code

Error Contents and Cause

Corrective Action

Corres-

ponding

(SD0)

1

 

 

CPU

 

 

 

 

 

 

Slot loaded with the QI60 is set to other than the Inteli (intelligent

 

QCPU

 

 

Make setting again to match the parameter I/O assignment with the

function

 

 

function module) or Interrupt (interrupt module) in the parameter I/O

 

 

actual loading status.

Ver. B

 

 

assignment.

 

 

 

or later

 

 

 

 

(1)In the parameter I/O allocation settings, an Inteli (intelligent function module) was allocated to a location reserved for an I/O

2100

module or vice versa.

(1)

Reset the parameter I/O allocation setting to conform to the

QCPU

(2) In the parameter I/O allocation settings, a module other than

 

actual status of the intelligent function module and the CPU

 

CPU (or nothing) was allocated to a location reserved for a CPU

(2)

module.

Rem

 

module or vice versa.

Delete the general-purpose switch settings.

 

(3)A general-purpose switch was set to the module with no general-purpose switches.

 

 

 

In parameter I/O allocation settings, a special function module was

Reset the parameter I/O allocation setting to conform with the actual

QnA

 

 

 

allocated to a location reserved for an I/O module. Or, the opposite

 

 

 

status of the special function modules.

 

 

 

has happened.

 

 

 

 

 

 

 

 

 

 

 

13 or more A-series special function modules (except for the QI60,

Keep the number of A-series special function modules that can

 

 

 

 

A1SI61) that can initiate an interrupt to the CPU module have been

QCPU

 

 

 

initiate an interrupt (except for the QI60, A1SI61) to 12 or fewer.

 

2101

 

installed.

 

 

 

 

 

 

 

 

 

13 or more special function modules (not counting the AI61)

 

Keep the number of special function modules that can initiate an

QnA

 

 

 

 

 

 

 

capable of sending an interrupt to the CPU module have been

 

 

 

interrupt (with the exception of the AI61 module) to 12 or fewer.

 

 

 

installed.

 

 

 

 

 

 

 

 

 

2102

 

7 or more A1SD51S have been installed.

 

Keep the number of A1SD51S to 6 or fewer.

QCPU

 

 

7 or more computer link modules (excludes A (1S) J71QC24) have

Keep the number of computer link modules (excludes A (1S)

QnA

 

 

 

been installed.

 

J71QU24) installed to 6 or fewer.

Rem

 

 

 

 

 

 

(1) Reduce the number of QI60/A1SI61 modules loaded in the

 

 

 

 

(1) Two or more QI60/A1SI61 modules are loaded in a single-PLC

single-PLC system to one.

 

 

 

 

(2) Change the number of QI60/A1SI61 modules set to the same

QCPU

 

 

 

 

system.

 

 

 

 

 

 

control PLC to only one in the multiple CPU system.

 

 

 

(2) Two or more QI60/A1SI61 modules are set to the same control

function

 

 

 

(3) Reduce the number of A1SI61 modules to only one in the

 

 

 

 

PLC in a multiple CPU system.

 

Ver. B

 

 

 

 

 

multiple CPU system.

 

2103

 

(3) Two or more A1SI61 modules are loaded in a multiple CPU

or later

 

 

When using an interrupt module with each QCPU in a multiple

 

 

 

 

system.

 

 

 

 

 

 

 

CPU system, change it for the QI60. (Use one A1SI61 module +

 

 

 

 

 

 

 

 

 

 

 

 

 

 

max. three QI60 modules or only the QI60 modules.)

 

 

 

 

Two or more QI60, A1SI61 interrupt modules have been installed.

Install only 1 QI60, A(1S)I61 module.

QCPU

 

 

 

The QI60 is loaded.

 

Remove the QI60.

Rem

 

 

 

Two or more AIS61 interrupt modules have been installed.

 

Install only 1 AI61 module.

QnA

 

2104

 

At the MELSECNET/MINI auto refresh parameter settings, the

Reset the parameter MELSECNET/MINI auto refresh unit module

QnA

 

 

module allocation that was set is different from the actual module

allocation setting so that it conforms to the station number of the

 

 

 

models at the station numbers in the link system.

 

module that is actually linked.

 

 

 

 

There are too many special function modules that can use

 

 

 

 

 

 

dedicated instructions allocated (number of modules installed).

 

 

 

 

 

(The total of the figures indicated below is above 1344.)

5)

 

 

 

 

 

 

(Number of AD59 modules installed ×

 

 

 

 

 

 

(Number of AD57 (S1)/AD58 modules installed ×

8)

 

 

 

 

 

 

(Number of AJ71C24 (S3/S6/S8) modules installed ×

10)

Reduce the number of special function modules installed.

 

 

2105

 

 

(Number of AJ71UC24 modules installed ×

10)

QnA

 

 

 

: When the expansion mode is used.

 

 

 

 

(Number of AJ71C21 (S1) modules installed ×

29)

 

 

 

 

(Number of AJ71PT32-S3/AJ71T32-S3 modules installed × 125)

 

 

 

 

 

 

(Number of AJ71QC24 (R2, R4) modules installed ×

29)

 

 

 

 

 

 

(Number of AJ71ID1 (2)-R4 modules installed ×

18)

 

 

 

 

 

 

(Number of AD75 modules installed ×

12)

 

 

 

 

 

 

Total > 1344

 

 

 

 

 

• Five or more MELSECNET/H modules are loaded in a whole

Reduce the number of modules to four or less in the whole multiple

QCPU

 

 

 

 

multiple CPU system.

 

function

 

 

 

• Five or more Q series Ethernet interface modules are loaded in a

CPU system.

Ver. B

 

 

 

 

whole multiple CPU system.

 

 

or later

 

 

 

(1) 5 or more MELSECNET/H modules have been installed.

 

(1) Keep the number to 4 or fewer.

 

 

 

 

(2) 5 or more Q series Ethernet interface modules have been

 

QCPU

 

 

 

 

installed.

 

(2) Keep the number to 4 or fewer.

 

 

 

 

 

Rem

 

 

 

(3) Identical network numbers or station numbers exist in the

 

(3) Check the network numbers and station numbers.

 

2106

 

 

MELSECNET/10 network system.

 

 

 

 

 

 

(1) 5 or more AJ71QLP21 & AJ71QBR11 modules are installed.

 

 

 

 

 

(2) 3 or more AJ71AP21/R21 & AJ71AT21B modules are installed.

(1) Install 4 or fewer modules.

 

 

 

 

(3) The total number of installed AJ71QLP21, AJ71QBR11,

 

 

 

 

 

 

(2) Install 2 or fewer modules.

 

 

 

 

 

AJ71AP21/R21, and AJ71AT21B modules exceeds 5.

 

 

 

 

 

 

 

(3) Reduce the total number of modulees to 4 or less.

QnA

 

 

 

(4) Identical network Nos. or identical station Nos. exist at the

 

 

 

 

 

(4) Check the network Nos. and station Nos.

 

 

 

 

 

MELSECNET/10 network system.

 

 

 

 

 

 

 

(5) Check the station Nos.

 

 

 

 

(5) 2 or more master or load stations exist simultaneously at the

 

 

 

 

 

 

 

 

 

 

MELSECNET(II) or MELSECNET/B data link system.

 

 

 

 

2107

 

Head X/Y set in the parameter I/O allocation settings is also the

Reset the parameter I/O allocation setting to conform with the actual

 

 

 

head X/Y for another module.

 

status of the special function modules.

Rem

 

 

 

 

 

 

 

(1) Network module A1SJ71LP21, A1SJ71BR11, A1SJ71AP21 ,

 

 

 

 

 

 

A1SJ71AR21, or A1SJ71AT2B dedicated for the A2USCPU

Change network module to QJ71LP21 or QJ71BR11.

QCPU

 

2108

 

 

has been installed.

 

 

 

(2) Network module A1SJ71QLP21 or A1SJ71QBR11 dedicated for

 

 

 

 

 

 

the Q2AS has been installed.

 

 

 

 

 

 

 

 

 

 

 

 

 

A(1s)J71LP21 or A(1s)J71BR11 for use with the AnUCPU network

Change network module to A(1s)J71QLP21 or A(1s)J71QBR11.

QnA

 

 

 

module has been installed.

 

 

 

 

 

 

 

 

2109

6

The control system and standby system module configurations are

Check the module configuration of the standby system.

Q4AR

 

different when a redundant system is in the backup mode.

 

 

 

 

 

 

 

1 Characters in parentheses ( ) indicate the special register numbers where individual information is being stored. 6 This can only be detected in the redundant system standby system.

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