8. TROUBLESHOOTING
MELSEC-A
8-8
8.2.2
Communication circuits
Following is shown the error code that is returned to the partner station via the communication circuit.
(1) Connection
control
(a) Initiate
Class Code
Cause
Initiate (0)
E_INIT_MAX_PDU_SIZE_INSUFF (1)
•
The number of maximum simultaneous
processing services is incorrect.
•
The support service setting is incorrect.
Initiate (0)
E_INIT_USER_DENIED (4)
•
A connection that has already been
established was specified.
(2) VFD control
(a) Status
Class Code
Cause
Access (6)
E_ACCESS_OBJ_INVALIDATED (1)
•
An error has occurred in the PC CPU.
(3) OD control
(a) GetOD
Class Code
Cause
Access (6)
E_ACCESS_OBJ_NON_EXIST (7)
•
An undefined OD was specified.
OD (7)
E_OD_OERFLOW (2)
•
An undefined OD was specified (the value
exceeded the maximum index value
registered in the specified index).
(b) PutOD
Class Code
Cause
OD (7)
E_OD_OERFLOW (2)
•
The OD was defined to a value that
exceeded the maximum number of
registrations.
•
The index value is not in the OD header
specification range.
DEFINITION (3)
E_DEF_OBJ_ATTR_INCONSIST (2)
•
An object that is not supported was defined.