A-25
Appendices
CJ-series PROFIBUS Master Unit Operation Manual for NJ-series CPU Unit (W509)
A-7 Slave Diagnostics Message
App
Slave Diagnostics Byte 1
A layout of Byte 1 is shown below. This byte is mapped to the high-byte of Word D.
A-7-2 Standard Diagnostics Data Bytes
Bit Name Description
00 Diag.Station_Non_Existent This bit is set by the Master Unit if the slave does not respond to any of the
request messages sent by the master. If this bit is set the diagnostic bits contains
the state of the last diagnostic message or the initial value. The slave device sets
this bit to zero in case of a correct response.
01 Diag.Station_Not_Ready This bit indicates that the slave device is not yet ready for data transfer.
02 Diag.Cfg_Fault Set by the slave device, this bit indicates that the last received configuration data
from the Master Unit are rejected. The configuration data in the slave device dif-
fer from the configuration sent by the Master Unit.
03 Diag.Ext_Diag This bit indicates that the diagnostics message returned by the slave device con-
tains extended diagnostics, i.e. it contains more than the mandatory 6 bytes.
04 Diag.Not_Supported In case the Master Unit sent a message to the slave device, which is not sup-
ported by that device, this bit will be set by the slave device.
05 Diag.Invalid_Slave_Respon
se
This bit is set by the Master Unit if the slave has returned an invalid response to a
Master request message. The slave device will set this bit to 0.
06 Diag.Prm_Fault Set by the slave device, this bit indicates that the last received parameter data
from the Master Unit have been rejected. The parameter data in the slave device
differ from the parameter sent by the Master Unit.
07 Diag.Master_Lock This bit indicates that the slave device has been parameterized by another mas-
ter. The bit is set by the Master Unit, if the address in byte 4 differs from 255 and
from the Master Unit’s own address. The slave device sets this bit to zero.
Byte 1
Diag.Master_Lock
Diag.Prm_Fault
Diag.Invalid_Slave_Response
Diag.Not_Supported
Diag.Ext_Diag
Diag.Cfg_Fault
Diag.Station_Not_Ready
Diag.Station_Non_Existent
76543210
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