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12. Appendix E: Profibus-DP Data and Diagnostics
The various elements presented here are detailed in the documentation of the Profibus-DP master you will have
to use. In the case of the TSX PBY 100 coupler of the Premium automatic controls, for example, these elements
are detailed in the
Implementation Manual – TSX PBY 100 – PROFIBUS-DP (ref.: TSX DM PBY 100E), and in
the PL7 PRO on line help (help path: Communication
Æ Profibus-DP).
However, the most important elements are reproduced here in order to make the LUFP7 gateway easier to use.
12.1. Gateway Profibus-DP Diagnostics
These diagnostics are the gateway's response to a specific command generated by a Profibus-DP master. This
command enables the master to check the status of one of its slaves.
In the case of the LUFP7 gateway, the response length is equal to 6 bytes, i.e. the minimum standard and
mandatory length for a response to a diagnostic command.
Under PL7 PRO, this response can be viewed in two different ways:
• In the “Debug” screen of the TSX PBY 100 coupler, when the slave
whose address corresponds to the gateway's is selected. The
gateway Profibus-DP diagnostics are then displayed in the
"PROFIBUS-DP diagnostic data". An example is given on the right.
It is an excerpt from the screen represented in chapter 4.2.13 Using
and Monitoring the TSX PBY 100 Coupler Configuration, page 36.
• Using the SEND_REQ function, the 16#0031 command code, and requesting specifically a diagnostic from
the slave concerned.
The table below describes the structure and content of the gateway response to a Profibus-DP diagnostic
command sent to it:
Bytes Structure Description
0
x0: not_reachable
x1: not_ready
x2 : config_fault
x3 : ext_diag
x4 : not_supported
x5 : invalid_rsp
x6 : param_fault
x7 : master_lock
x0=1 if the slave is non connected or switched off
x1=1 if the slave is not ready for data exchange
x2=1 if there is a slave configuration error upon test request
x3=1 if extended diagnostic (bytes 7-255); x3=0 for the LUFP7 gateway
x4=1 if the function is not supported by the slave
x5=1 if there is an error in the slave's first response
x6=1 if there is an error in the slave's last setting message
x7=1 if the slave is already set up by another master module
1
x0: prm_required
x1 : diag_data_rdy
x2 : is_slave_diag
x3 : wdt_active
x4 : freeze_mode
x5 : sync_mode
x6 (non utilisé)
x7 : inactive
x0=1 if the slave should be configured and set up again
x1=1 if the slave generated a diagnostic to be processed by the master
x2=0/1 if the diagnostic was created by the master / by the slave
x3=1 if the slave's watchdog is active
x4=1 if the selected slave inputs are frozen
x5=1 if the selected slave outputs are frozen
——
x7=1 if the slave is inactive (excluded from the processing)
2
x0..x6 (unused)
x7: diag_overflow
——
x7=1 if the number of diagnostic bytes exceeds the size of the reception words
3
master_address Address of the master module that sets up the slave
4-5
PNO_identifier
Slave's identification code
6-244
specific_diag (unused) Optional specific diagnostic data (none for the LUFP7 gateway)