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Appendices

A-30

CJ-series PROFIBUS Master Unit Operation Manual for NJ-series CPU Unit (W509)

 Channel Identifier Byte

 Error Identifier Byte

Bit Name Description

00 to 05 Channel number These bits contain the number of the channel, which reports the diagnostics. The

channel number ranges from 0 to 63.

06 to 07 I/O type Bit 6 and 7 indicate the type of I/O channel, from which the diagnostics data is

sent.

• 00: Reserved

• 01: Input

• 10: Output

• 11: Input/Output

Bit Name Description

00 to 04 Error number These bits contain the number of the error which occurred at the channel. The

error number ranges from 0 to 31, and can have the following meaning:

• 0: Reserved

• 1: Short circuit

• 2: Under voltage

• 3: Over voltage

• 4: Overload

• 5: Over temperature

• 6: Line break

• 7: Upper limit value exceeded

• 8: Lower limit value exceeded

• 9: Error

• 10 to 15: Reserved

• 16 to 31: Manufacturer specific

05 to 07 Channel size type Bit 5, 6 and 7 indicate the size of the channel, from which the diagnostics data is

sent.

• 000: Reserved

• 001: Bit

• 010: 2 Bit

• 011: 4 Bit

• 100: Byte

• 101: Word

• 110: 2 Words

• 111: Reserved

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