Appendices
A-32
CJ-series PROFIBUS Master Unit Operation Manual for NJ-series CPU Unit (W509)
The Error codes returned by a PROFIBUS DP-V1 slave device are defined in the PROFIBUS DP-V1
Extension to the PROFIBUS standard. This section lists the Error codes, which can be returned as a
result of a PROFIBUS DP-V1 MSAC1 services. From these codes, the user can determine the cause of
the failure.
The figure below shows the two of the three Error code bytes, returned by a PROFIBUS DP-V1 slave
device, in case an MSAC1 service resulted in an error. The third byte, Error code 2, which is not shown
below will always contain user specific error codes.
In case the Error decode byte is 128, i.e. PROFIBUS DP-V1, the Error code 1 byte can have the possi-
ble values defined in the table below.
A-7-4 PROFIBUS DP-V1 Error Codes
Bit Name 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 contain-
ing 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
®
76543210
Error code
Error code 1 byte
Error class
76543210
Error decode
Error decode byte
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