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3 Memory Allocations
CJ-series EtherCAT Slave Units Operation Manual (W541)
3-2 CIO Area Allocations
3
3-2-2 Details of the Allocated CIO Area Words
4 Unit Memory Error Unit ON:
Indicates an error in internal memory where the error log or
I/O communication area data is stored. The error occurs
when the Unit starts up or when the error log is written.
OFF:
Indicates that the error did not occur. Once this error
occurs, the bit will remain ON and will not return to OFF.
Default: OFF
5 ESC Error Unit ON:
Indicates an error in ESC.
OFF:
Indicates that the error has not occurred. Once this error
occurs, the bit will remain ON and will not return to OFF.
Default: OFF
6 to 15 Reserved --- ---
Unit Status 2 (n+11)
Bit Name Manipulated by Unit operation
0 Online Status Unit ON:
Indicates that the Unit is online and capable of commu-
nicating on the network.
OFF:
Indicates that the Unit is offline.
A Unit will go offline under the following conditions:
• Operation is stopped by the hardware/software
check at startup.
• An ESC Error has occurred.
Default: OFF
1 to 14 Reserved --- ---
15 Error Log Registered Unit ON:
Indicates that an error log was registered. Turns ON at
the first error log registration for the Unit.
OFF:
Indicates that no errors are registered in the error log.
Turns OFF when the Unit receives an error log clear
request.
Default: OFF
Bit Name Manipulated by Unit operation
Online Status
n + 11
Error Log Registered
14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
15
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