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(1) System memory #170 to 177 (option module error code)
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-21MN recovers from the
error.
(2) System memory #160 to 167 (self diagnosis error code)
When any of errors "01(H)" to "18(H)" occurs among the error codes listed on the previous page, the
JW-21MN stores error code "53(H)" (optional error) in the system memory #160. It does not store any
error code in system memory #170.
(3) System memory #150 (monitor error switch number)
When you monitor the system memory #050 at the occurrence of error code "53(H)," you can check
the module No. switch setting value of the error causing option module with a bit pattern. (At normal:
OFF, at error: ON)
[Ex.] In the case below, an option module having the module No. switch setting value as "2" is an
error.
76543210
6543210
#050
Module No. switch
setting value
#050
76543210
00100000
6E 6F
6E
#177 #176 #175 #174 #173 #172 #171 #170
Occurrence of BCC error
Occurrence of parameter
setting error
Disappear