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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 of receiving
2C Media error
30 EEPROM error
6E BCC error
6F Parameter setting error
C1 Communication error
Error code stored to system memory
(H)
#170 to 177
#160
53
Cause
Measure
Replace the JW-20CM
Replace the JW-20CM
Check the communication
cable and slave module
Error
code
(HEX)
Check the communication cable
Check the parameter setting
Replace the JW-20CM
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 slave station number
• Replace the JW-20CM
Check the parameter setting
(3) Error code
When an error occurs in the JW-20CM, it stores the occurred error’s code to system memory #170
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.
Check the
communication cable
to
1F
20
21
22
23
2A
2B
2C
30
6E
6F
C1
to
FF
6E 6F
6E
• The error code stored in the system memory #170 is shifted to #170 to #177 one after the other as new
errors occur. Thus, the system memory can store up to 8 errors. When the PC is operating by RAM,
these error codes do not disappear even after turning OFF the power.
The contents of system memory #170 to #177 are kept storing after the JW-20CM recovers from the
error.
#177 #176 #175 #174 #173 #172 #171 #170
Occurrence of BCC error
Occurrence of parameter
setting error
Disappear
Remarks