Sharp JW-21MN manual Errors and Countermeasures, Indication lamps, 12-1, Details Measure

Chapter 12: Errors and Countermeasures

The operating condition of the JW-21MN can be monitored using its indication lamps, flags, and the system memory of a PC.

12-1 Indication lamps

ME-NET

COMM

RD

LT

COM.E

LED

Details

Measure

name

SD

CD

T

UNT.E

CM

Lights during data link operation

80

40

20

10

8

4

2

1

SD

Lights while sending data

RD

Lights while receiving data

CD

Lights when detecting carrier

LT

Lights when turning ÒONÓ the termination resistance

T

Lights during testing (TEST)

- Check disconnection of the communication

Lights at a communication error

cable

COM.E

- Check the set contents of switches

(COM. E)

- Cheek the set contents of parameters

- Check the power voltage of PC

UNT.E

Lights at time up of the watchdog timer

Replace the JW-21MN

LED "1" to "80" indicate error codes when an error occurs. Error codes, their

causes, and measures are as shown in the table below.

LED name

Error

Cause

Measure

80

40

20

10

8

4

2

1

code

(DEC)

○

○

○

○

○

○

○

●

01

ROM error, upper CPU

○

○

○

○

○

○

●

○

02

RAM error, upper CPU

○

○

○

○

○

○

●

●

03

2 port RAM error against PC, upper CPU

Replace the JW-21MN

○

○

○

○

○

●

○

○

04

2 port RAM error against communication CPU, upper CPU

○

○

○

●

○

○

○

●

11

ROM error, communication CPU

- Check the communication

○

○

○

●

○

○

●

○

12

RAM error, communication CPU

cable

- Check for doubled allocation

○

○

○

●

●

○

○

○

18

Communication LSI error, communication CPU

of station number

○

○

○

●

●

●

●

●

1F

No response, communication CPU

- Replace the JW-21MN

○

○

●

○

○

○

○

○

20

More than one token detected

Check the parameter setting

○

○

●

○

○

○

○

●

21

Doubled address detected

○

○

●

○

○

○

●

○

22

Fault of sending section

Replace the JW-21MN

○

○

●

○

○

○

●

●

23

Token does not return within the rated interval

Check the communication cable

○

○

●

○

●

○

●

○

2A

Over flow of receiving buffer.

○

○

●

○

●

○

●

●

2B

Flame length error

Check the communication cable

○

○

●

●

○

○

○

○

30

EEPROM error

Replace the JW-21MN

○

●

●

○

○

○

○

○

*60

Switch setting error

Check the switch setting

○

●

●

○

●

●

●

○

*6E

BCC error

Check the parameter setting

○

●

●

○

●

●

●

●

6F

Parameter setting error

●

●

○

○

○

○

○

●

*C1

Communication error

Check the communication cable

- After converting into octal, the lower two digits

to

to

and slave module

represent the slave station number of the current

● ● ● ● ● ● ● ●

* FF

error. (Ex. C1(H) = 301(8) = slave station 01)

●: ON, ○ : OFF

* Error code 60(H), 6E(H), C1 to FF(H) are special error codes unique to the JW-21MN. Other codes are error codes specified by the ME-NET.

Prior to displaying the error code C1 to FF(H), the setting of the parameter addresses 007750 to 007757(8) is required. (See page 16-12.)

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