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12-6
12-3 Storage of error code
When an error occurs in the JW-21MN, it stores the occurred error’s code to system memory #160,
#170 and error history storage register of each station's PC.
- In some cases, error code 23(H) or 2A(H) is stored when inputting power. This is not an error.
- Error code 60(H), 6E(H), C1 to FF(H) are special error codes unique to the JW-21MN.
01 ROM error, upper CPU
02 RAM error, upper CPU
03
2 port RAM error against PC, upper CPU
04 2 port RAM error against
communication CPU, upper CPU
11 ROM error, communication CPU
12 RAM error, communication CPU
18
Communication LSI error, communication CPU
1F No response
20 More than one token detected
21 Doubled address detected
22 Fault of sending section
23
Token does not return within the rated interval
2A Over flow of receiving buffer.
2B Flame length error
30 EEPROM error
60 Switch setting error
6E BCC error
6F Parameter setting error
C1 Communication error
Error code stored to system memory
#170
#160
53(H)
Cause
Measure
Replace the JW-21MN
Replace the JW-21MN
Check the communication cable
and slave module
Error
code
(HEX)
Check the communication cable
Check the parameter setting
Check the switch setting
Replace the JW-21MN
FF
-
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)
- Check the communication
cable
- Check for doubled allocation
of station number
- Replace the JW-21MN
Check the parameter setting
Check the communication cable
to
1F (H)
20 (H)
21 (H)
22 (H)
23 (H)
2A (H)
2B (H)
30 (H)
60 (H)
6E (H)
6F (H)
C1 (H)
to
FF (H)