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3-10

- PROFIBUS DP Compatible Network Unit DL-PD1 User's Manual (GT-70A) -

Executing Communication

3-4 Diagnostic Function

Using the slave diagnostic function of PROFIBUS DP, the information of error caused on

the DL-PD1 or sensor amplifier can be sent to the master via PROFIBUS DP.

Slave diagnosis structure

The frame length of the DL-PD1 slave diagnosis is the maximum of 67 bytes. The slave

diagnosis consists of 6-byte standard diagnosis, 4-byte Identifier-related diagnosis, 9-

byte module status and maximum of 48-byte Channel-related diagnosis. The frame

length of the Channel-related diagnosis changes depending on the number of sensor

amplifiers connected. The minimum length is 3 bytes and the length increases 3 bytes

per sensor amplifier additionally connected.

Also, the diagnostic function can be set to Enable/Disable by slot at the parameter

setting for DL-PD1. When the diagnostic function is set to Disable, the slot information is

deleted from the diagnostic frame.

"Parameterization" (page 3-8)

Octet

Station status 1 to 3

PROFIBUS DP master address

Manufacturer ID

Identifier-related diagnosis

(Error information)

Module status

Channel-related diagnosis

Minimum 3 bytes

3 bytes increase per slot

Standard Diagnosis

Channel-related

Diagnosis

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