6-17
6 Message Communications
CJ-series PROFIBUS Master Unit Operation Manual for NJ-series CPU Unit (W509)
6-3 Acyclic Messages
6
6-3-2 PROFIBUS MESSAGE SEND (2809)
Error Decode Byte
In case the Error decode byte is 128, i.e. PROFIBUS DP-V1, the Error code 1 byte can have the
possible values defined in the table below.
Error Code 1 Byte
Error Code 2 Byte
This error code will always contain user specific error codes. If necessary, refer to the slave device’s
documentation for decoding the returned byte.
Bit Description
00 to 07 Error Decode The code determines the protocol type of the slave which returned the error code. Since this
error scheme can also be used in network applications containing protocol converters (i.e.
gateways), non-PROFIBUS protocols are also defined in this list.
• 0 to 127: Reserved
• 128: PROFIBUS DP-V1
• 129 to 253: Reserved
• 254: PROFIBUS FMS
•
255: HART®
Error Class Code Error Code Description
0 to 9 Reserved --
10 Application • 0: Read error
• 1: Write error
• 2: Module failure
• 3 to 7: Reserved
• 8: Version conflict
• 9: Feature not supported
• 10 to 15: User specific
Error codes related to the applica-
tion, i.e. the slave device it self or I/O
modules connected to this device.
11 Access • 0: Invalid index
• 1: Write length error
• 2: Invalid slot
• 3: Type conflict
• 4: Invalid area
• 5: State conflict
• 6: Access denied
• 7: Invalid range
• 8: Invalid parameter
• 9: Invalid type
• 10 to 15: User specific
Error codes related to accessing the
requested data area in the slave
device or I/O modules connected to
the slave device.
12 Resource • 0: Read constrain conflict
• 1: Write constrain conflict
• 2: Resource busy
• 3: Resource unavailable
• 4 to 7: Reserved
• 8 to 15: User specific
Error codes related to resources
inside the slave device which are
required to process the requested
data, e.g. functions required to
implement a requested action.
13 to 15 User Specific --
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