(Error code)

 

LED name

 

Error

Cause

Measure

S7 6

5

4

3

2

1 S0

code

(HEX)

 

 

 

 

 

 

 

 

 

 

 

○ ○ ○ ○ ○ ○ ● 01(H) ROM error, upper CPU

○ ○ ○ ○ ○ ● ○ 02(H) RAM error, upper CPU

○ ○ ○ ○ ○ ○ ● ● 03(H)

2 port RAM error against PC, upper CPU

Replace the JW-20CM

○ ○ ○ ○ ○ ● ○ ○ 04(H)

2 port RAM error against communication CPU, upper CPU

 

 

 

 

 

 

○ ○ ○ ● ○ ○ ○ ● 11(H)

ROM error, communication CPU

 

 

 

• Check the communica-

 

 

 

○ ○ ○ ● ○ ○ ● ○ 12(H)

RAM error, communication CPU

 

tion cable

○ ○ ○ ● ● ○ ○ ○ 18(H)

Communication LSI error, communication CPU

 

• Check for doubled allocation

 

of slave station number

 

 

 

○ ○ ○ ● ● ● ● ● 1F(H)

No response, communication CPU

 

• Replace the JW-20CM

○ ○ ● ○ ○ ○ ○ ○ 20(H)

More than one token detected

Check the parameter

○ ○ ● ○ ○ ○ ○ ● 21(H)

Doubled address detected

setting and switch setting.

 

 

 

 

○ ○ ● ○ ○ ○ ● ○ 22(H)

Fault of sending section

• Replace the JW-20CM

○ ● ○ ○ ○ ● ● 23(H) Token does not return within the rated interval • Check the communication cable

○ ○ ● ○ ● ○ ● ○

2A(H)

Overflow of receiving buffer.

 

Occurs when the upper CPU processing is delayed. Check the communication

 

 

 

 

 

○ ○ ● ○ ● ○ ● ●

2B(H)

Flame length error

• Occurs because of a media execution cable

○ ○ ● ○ ● ● ○ ○

2C(H)

Media error

error or noise from outside.

 

○ ○ ● ● ○ ○ ○ ○

30(H)

EEPROM error

 

Check the communication cable

 

Replace the JW-20CM

 

 

 

 

 

 

 

 

 

● ○ ● ● ● ● ● ○

BE(H)

BCC error

 

Check the parameter contents.

● ○ ● ● ● ● ● ●

BF(H)

Parameter setting error

 

● ○ ○ ○ ○ ○ ● C1(H) Communication error

 

 

 

 

 

 

 

 

 

• After converting into octal, the lower two digits

Check the communication

 

 

 

to

 

 

to

 

 

 

 

 

represent the slave station number of the current

cable and slave module

 

 

 

 

 

 

 

 

 

 

 

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

 

8

: ON, ○ : OFF

Remarks

Error codes “23” and “2A(H)” may occur when applying power. This is not an error.

To check the communication cable, remove both connectors and short the connector terminals at one end. Then measure the conductivity using a tester.

Check the parameter and switch settings for all stations. If the settings are correct, replace the JW-20CM or JW-20RS.

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