Yokogawa JUXTA VJ Series Limit Alarms Manual de usuario descargar pdf (Pagina 48)

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IM 77J01J11-01E 3rd Edition : Oct. 15, 2007-00

5.2.2 Response Error Code[Response]

● Message Format in the Event of Error

If there are any inconsistencies other than communication errors in a message, a VJ Series

signal conditioner does nothing, but returns the following message.

Number of bytes in RTU mode

Number of bytes in ASCII mode 2

Address

Number

(ADDRESS)

Element Function Code

(*1)

Error Code Error Check [CR] [LF]

None

050220E.EPS

*1: The function code contains a function code (hexadecimal number) + number 80 (hexadecimal number).

● Response Error Codes

Table 5-3 List of Error Codes

Error Code Meaning Description

02 D-register number error

Function code error

03 D-register count error

D-register number out of the range has

been specified.

No function code exists.

Number of D registers has been specified,

being out of the range.

050221E.EPS

● Even when a message is sent, no response returns if:

• Retransmission error (overrun, framing, parity, LRC, or CRC-16 error) was detected.

• Address in an instructed message is incorrect.

• Interval between data composing a message was 2 seconds or more.

• CRC-16 or LRC values are incorrect.

Note: As a countermeasure, provide a timeout process in the communication functions of a higher-level device or in the

communication program.

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Yokogawa JUXTA VJ Series Limit Alarms Manual de usuario Pagina 48