Mitsubishi Electric GT14, User Manual

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61. MICROCOMPUTER CONNECTION (SERIAL)
61.4 Device Data Area
61.4.1 D devices
The D devices are word devices into which GOT communication errors, clock data or other information are stored.
The user can also store data using the user area.

List of D devices
The following lists the D devices (virtual devices inside the GOT).
(Continued to next page)
Address Description Set side
D0 to 2 Unused -
D3
Communication error status
Stores the communication error details of GOT.
• b4 to 6 turn ON when an SIO error occurs, and turn OFF when a request message from the host is received successfully
after the error occurrence.
• b7 turns ON about 3 seconds after the host side DTR becomes OFF, and turns OFF when transmission is performed
successfully to the host after the error occurrence.
System
D4
Clock data (year)
D5
Clock data (month)
D6
Clock data (day)
b15 b0 – b3
Unused
– b4
SIO framing error
b5
SIO parity error
SIO overrun error
b6 b7
Communication timeout
error
Unused
b8
0: Normal
1: Error
b15 b0 –
Lower 2 digits of calendar
year stored as 2-digit BCD
–
b7
Unused
b8
b15 b0 –
Data of months 01 to
12 stored as 2-digit BCD
– b7
Unused
b8
b15 b0 –
Data of days 01 to
31 stored as 2-digit BCD
– b7
Unused
b8