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29.4.11
UNIGATE fieldbus gateway for ProfibusDP V. 4.7
51
Deutschmann Automation GmbH & Co. KG
ProfibusDP
Supposing the DPV1 is activated and a master (which does not support the alarms and status
messages) is connected, then our gateway error number is presented as "external diagnosis"
with 4 bytes (see above), at which point the 4th byte contains the error number and the preceding
3 bytes (0x81, 0x00, 0x00) can be ignored.
15.3 Data exchange
After the Master, in the diagnostic, detects that the Slave is ready for data exchange, it sends
data exchange telegrams. Either the Master stores the data in the input/output direction in the
address area specified during project planning or the control program must fetch or retrieve the
data using specific function blocks.
Содержание UNIGATE RS232/422
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