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b) Acknowledgement
Acknowledgement area
02D0H Request code (0012H)
02D1H Completion status
See "4.7 Completion Status" for the above completion status.
c) Slave Device Parameters
For slave device parameters, refer to the description of the relevant slave devices except for
the parameters listed in the following Table 4.15.
Note the DN211 has the following restrictions in transmitting "0 byte" to a slave device.
Restrictions
When a slave device fails to communicate with the DN211 due to some reason (power of
the slave device side turned OFF, connector removed, etc.), the DN211 cannot identify
the slave device being malfunctioned.
Even after the cause of the failure is solved, no communication between the slave
device
⇔
DN211 can be resumed.
Note:
Though the present DN211 has the above-mentioned restrictions, an upgraded version
of the internal software will solve those restrictions.
Table 4.15 Slave Device Parameters
Parameter Description
San type Specifies the transmission system of a slave device.
0: Bit strobe
1: Polling
2: 2: Bit strobe and polling
No value other than 0, 1, or 2 can be
specified (reserved).
Poll background polling Specifies an access interval that the DN211 can have to a device.
00: Scan polling (accessing for every scan)
01: Background polling (accessing by the number of scan times
specified by the poll ratio)