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69
Table 4.3 DN21's Modes and Station statuses
DN211's mode Bit "1" Station status
a Down mode DOWN 8000H
b After switching ON the power or after issuing a reset
request from the T2/T2E/T2N
STBY
2000H
c No slave device is registered (or deleted) in the
DN211 in mode b).
STBY
NCOIN
2040H
d When a slave device is registered in mode c) by a
parameter setting request
STBY
2000H
e When "standby" is requested by a module control
request from the T2/T2E/T2N
STBY
2000H
f When "transmission enabled, polling mode
transmission, asynchronous mode" is requested by
a module control request from the T2/T2E/T2N and
transmitted normally
RUN
START
POLL
1210H
g When "transmission enabled, bit strobe mode
transmission, asynchronous mode" is requested by
a module control request from the T2/T2E/T2N and
transmitted normally
RUN
START
BITS
1410H
h When "transmission enabled, polling mode and bit
strobe mode transmissions, asynchronous mode" is
requested by a module control request from the
T2/T2E/T2N and transmitted normally
RUN
START
POLL
BITS
1610H
I When asynchronous mode is requested in a mode
within f) to h)
Bits from f) to h),
followed by SYNC
1218H
1418H
1618H
j While transmitting with a slave device in a mode
within f) to i), the slave device stopped responses.
The bits from f) to
i), followed by
TXERR
1230H
1430H
1630H
1238H
1438H
1638H
k When busoff occurs, the DIP switch of the DN211
(BUSOFF) remains OFF (when the DN211 has
control of restarting transmission)
Station status bits before busoff
occurring, followed by :BUSOFF
l When busoff occurs, the DIP switch of the DN211
(BUSOFF) remains ON (changing to standby mode
when busoff occurring)
STBY
BUSOFF
2004H
m An overlapped node address is detected when
starting transmission
STBY
DPADR
2002H