Chapter 12: errors and countermeasures, 1 indication lamps, Chapter 12: errors and countermeasures -1 to 7 – Sharp JW-21MN User Manual

Page 82: 1 indication lamps -1, Me-net

12-1

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

LED "1" to "80" indicate error codes when an error occurs. Error codes, their
causes, and measures are as shown in the table below.

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.)

ME-NET

80 40 20 10

COMM

COM.E

UNT.E

Measure

LED

name

COM.E

UNT.E

Details

Lights during data link operation

Lights while sending data

Lights while receiving data

Lights when detecting carrier

Lights when turning “ON” the termination resistance

Lights during testing (TEST)

Lights at a communication error

(COM. E)

Lights at time up of the watchdog timer

- Check disconnection of the communication

cable

- Check the set contents of switches
- Cheek the set contents of parameters
- Check the power voltage of PC

Replace the JW-21MN

ROM error, upper CPU

RAM error, upper CPU

2 port RAM error against PC, upper CPU

2 port RAM error against communication CPU, upper CPU

ROM error, communication CPU

RAM error, communication CPU

Communication LSI error, communication CPU

No response, communication CPU

More than one token detected

Doubled address detected

Fault of sending section

Token does not return within the rated interval

Over flow of receiving buffer.

Flame length error

EEPROM error

Switch setting error

BCC error

Parameter setting error

Communication error

- After converting into octal, the lower two digits
represent the slave station number of the current
error. (Ex. C1

(H)

= 301

(8)

= slave station 01)

80 40 20 10 8 4 2

Measure

Cause

Replace the JW-21MN

Check the communication cable

Replace the JW-21MN

Check the switch setting

Check the parameter setting

Replace the JW-21MN

*60

*6E

Error

code

(DEC)

Check the parameter setting

Check the communication cable

and slave module

LED name

- Check the communication

cable

- Check for doubled allocation

of station number

- Replace the JW-21MN