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6 F 3 B 0 3 6 4
70
(2) Down Information (02CDH: 1 word)
This register stores the cause of becoming the down mode when the DN211 turns down mode.
When this happens, some of the following down codes are displayed in the 7
-
segment LED on the
front panel.
Table 4.4 Down Information
Down information
(hex.)
Cause of down mode occurred
F0H Watchdog timeout occurred
F1H Memory bus abnormal occurred
F2H TRAP occurred
F3H ROM's BCC check error occurred (on DN211 startup)
F4H RAM's read/write error occurred (on DN211 startup)
F5H Read/Write error occurred for the DN211 communication memory (on
DN211 startup)
F6H DN211 node address setting abnormal
F7H DN211 network communication rate setting abnormal
F8H Configuration data EEPROM read error occurred
(3) Polling / Bit Strobe Scan Cycle (02C8H - 02CCH: 5 words)
This area stores the DN211's scan time in milliseconds for the polling mode or bit strobe mode
transmission.
When in asynchronous mode: The "scan cycle" means the time that the DN211 starts carrying out
data input/output with all slave devices until starting the next input/output.
• Only for the slave devices with the polling mode, the "scan cycle" means the time from
starting polling input/output until starting the next polling input/output.
• Only for the slave device with the bit strobe mode, the "scan cycle" means the time from
starting bit strobe input/output until starting the next bit strobe input/output.
• For the salve devices where the polling mode and bit strobe mode are intermingled, the
"scan cycle" means the time from starting bit strobe input/output, followed by performing
polling input/output, until starting the next bit strobe input/output.
When in synchronous mode: The "scan completion time" means the time from the T2/T2E/T2N's
writing "1" in the "bit strobe output data semaphore/polling output data semaphore" until the
DN211's writing "1" in the "input data semaphore."
Table 4.5 Scan Cycle Configuration
02C8H Scan cycle/Scan completion time
02C9H Asynchronous mode: Min. scan cycle value
02CAH Asynchronous mode: Max. scan cycle value
02CBH Synchronous mode: Min. scan cycle time value
02CCH Synchronous mode: Max. scan cycle time value
(4) Completion of module initialization (02C6H:1 word)
This register indicates the completion of initialization processing by switching ON the power or by
requesting resetting.
"1": Completion of initialization
"Value other than 1": Under initialization