snap ethernet-based i/o units protocols and programming guide

Date and Time Configuration—Read/Write
Use this area of the memory map to view or change the date and time on SNAP Ultimate brains
or SNAP-ENET-RTC brains, which contain a real-time clock. On other brains you cannot set the
data and time; this area will show the elapsed time since the brain was last turned on.
Starting Address Length Type Description
FFFF F035 0000 17 S-ZT Set date and time. Format: YYYY-MM-DD HH:MM:SS.00
Last valid address for this area: FFFF F035 0023
Status Area Write—Read/Write
Although this area is read/write, you would normally write to it. When you write to this area, you
must write all four bytes, or you’ll receive an “invalid memory address” error. You can write to
this area using either a quadlet or a block write.
Starting Address Length Type Description
FFFF F038 0000 4 UI Operation code
0x00000001 – Send Powerup Clear
0x00000002 – Reset to defaults as follows:
Clears error information in the status area (error code,
transaction label, source address, error address).
Clears gains and offsets, counters (which are also
deactivated), latches, min/max data.
Turns off digital outputs.
Sets analog outputs to zero scale (0 counts).
Requires a Powerup Clear after resetting.
0x00000003 – Stores all configuration data to flash, so it is restored
when the brain is turned on.
0x00000004 – Erase configuration from flash
0x00000005 – Reset hardware, which is just like cycling power to the
brain. If point configuration information has not been stored to flash,
points will be reset to defaults. After a hardware reset, the brain waits
for a Powerup Clear.
0x00000006 – Clear digital event configuration.
0x00000007 – Clear alarm configuration.
0x00000008 – Clear PPP configuration.
0x00000009 – Clear email configuration.
0x0000000A – Clear timer configuration.
0x0000000C – Clear data log.
0x87654321 – Boot to loader.
FFFF F038 0004 4 UI Set brain to send bootp request when turned on.
0 (default) = Send bootp request only if brain’s IP address is 0.0.0.0.
1 = Always send bootp request when brain is turned on.
FFFF F038 0008 4 B Set degrees in F or C.
0 (default) = degrees C; non-0 = degrees F
FFFF F038 000C 4 -- Reserved
SNAP Ethernet-Based I/O Units Protocols and Programming Guide 107